SERVICE BULLETIN Al-69 "AMENDMENT"

thru BO-13-4552 BO-13-4554 thru BO-13-4557 BO-13-4559 BO-13-4561 BO-13-4562 BO·13-4564 BO-13-4566 BO'13-4567 BO-13-4569 thru BO-13-4575 BO-13-4577 thru BO-13-4579 BO-13·4581 thru BO·13-4585 BO·13-4587 BO-13-4588 BO·13-4590 thru BO-13-4598 BO·13-4600 BO-13-4601 BO-13-4606 BO-13-4623 BO-13-4626 BO-13-4629 BO·13-4631 BO'13-4632 BO·13-4637 BO'13-4639 BO·13-4644 thru BO-13-4647 BO-13-4653 BO·13-4654 BO-13-4657 PART NO. AIO-4894 Serial No. BE-14-10218 (15) thru BE·14-10262 BE-14-10264 BE-I4-10265 BE-I4-10267 BE-14-10269 BE'I4-10271 thru BE·I4-10273 PART NO. AIO·4894 (Cont'd) Serial No. BE·I4-10275 BE·I4-10276 BE'14-10278 BE'14-10279 BE·I4-10281 BE-I4-10282 BE·I4-10285 thru BE·I4-10288 BE·I4-10290 BE·I4-10292 BE·I4-10294 BE-I4-10297 BE·14-10299 BE'14-10300 BE-I4-10302 BE-14·10303 BE·I4-10307 BE·14-10308 BE·14-10310 thru BE-14-10320 BE-14-10322 thru BE-14'10332 BE·14-10334 BE-14-10335 BE-14-10337 BE-14-10338 BE-I4-10340 BE-I4-10342 thru BE-I4-10344 BE-14-10346 BE-I4-10348 thru BE-14-10352 BE-14-10354 thru BE-14-10356 BE-I4-10358 thru BE-14-10361 BE-I4-10363 thru BE-I4-10367 BE-14-10369 BE-I4-10374 BE-14-10377 thru BE·14-10379 BE-I4-10381 BE-I4-10382 BE-I4-10390 BE·I4-10391 PAGE 3 SERVICE BULLETIN Al-69 PART NO. AlO-4894 (Cont'd) PART NO. AlO-4894 (Cont'd) PART NO. AIO-4894 (Cont'd) Serial No. BE-14-10393 Serial No. BE-14-10605 Serial No. BE-14-10709 BE-14-10395 thru BE-14-10712 thru BE-14-1061O BE-14-10713 BE-14-10408 BE-14-10612 BE-14-10716 BE-14-10410 thru BE-14-10718 thru BE-14-10614 BE-14-10722 BE-14-10412 BE-14-10616 thru BE-14-10414 BE-14-10618 BE-14-10730 thru thru BE-14-10732 BE-14-10469 BE-14-10622 thru BE-14-10471 BE-14-10624 BE-14-10740 thru thru BE-14-10742 BE-14-10486 BE-14-10627 thru BE-14-10488 BE-14-10629 BE-14-10747 thru thru BE-14-10749 BE-14-10491 BE-14-10633 BE-14-10750 BE-14-10494 BE-14-10636 BE-14-10752 thru BE-14-10637 BE-14-10755 BE-14-10498 BE-14-10639 thru BE-14-10501 thru BE-14-10758 BE-14-10502 BE-14-10644 BE-14-10760 BE-14-10504 BE-14-10646 thru thru thru BE-14-10772 BE-14-10527 BE-14-10651 BE-14-10774 BE-14-10530 BE-14-10653 thru thru BE-14-10657 BE-14-10776 BE-14-10533 BE-14-10659 BE-14-10779 BE-14-10537 thru BE-14-10780 BE-14-10539 BE-14-10661 BE-14-10782 BE-14-10544 BE-14-10664 thru BE-14-10546 BE-14-10665 BE-14-10784 BE-14-10549 BE-14-10667 BE-14-10786 BE-14-10550 BE-14-10668 thru BE-14-10552 BE-14-10671 BE-14-10806 BE-14-10554 thru BE-14-10808 BE-14-10557 BE-14-10674 thru BE-14-10559 BE-14-10676 BE-14-10831 BE-14-10561 BE-14-10677 BE-14-10833 BE-14-10563 BE-14-10680 thru BE-14-10565 BE-14-10682 BE-14-10844 thru thru BE-14-10849 BE-14-10572 BE-14-10684 BE-14-10851 BE-14-10574 BE-14-10686 BE-14-10852 BE-14-10575 thru BE-14-10857 BE-14-10579 BE-14-10688 thru BE-14-10582 BE-14-10690 BE-14-10862 thru BE-14-10692 BE-14-10865 BE-14-10585 thru thru BE-14-10588 BE-14-10694 BE-14-10875 thru BE-14-10696 BE-14-10877 BE-14-10592 BE-14-I0697 thru BE-14-10594 BE-14-10699 BE-14-10881 BE-14-10595 BE-14-10700 BE-14-10884 BE-14-10598 BE-14-10702 thru thru thru BE-14-10891 BE-14-10600 BE-14-10707 PART NO. A10-4894 (Cont'd) Serial No. BE-14-10893 thru BE-I4-10899 BE-I4-10901 BE-14-10902 BE-14-10906 BE-I4-10908 thru BE-I4-10912 BE-I4-10915 thru BE-14-10917 BE-I4-10919 BE-14-10921 BE-I4-10923 thru BE-14-10926 BE-14-10928 BE-14-10929 BE-14-10931 thru BE-14-10934 BE-I4-10936 BE-14-10938 thru BE-I4-10940 BE-14-10942 thru BE-14-10950 BE-14-10952 thru BE-14-10956 BE-14-10958 BE-14-10959 BE-I4-10962 thru BE-14-10969 BE-14-10971 BE-14-1 097 5 BE-14-10977 BE-14-10978 BE-14-10980 thru BE-14-10982 BE-14-10986 BE-14-10989 thru BE-14-10991 BE-14-10994 BE-I4-10996 thru BE-14-10998 BE-14-ll001 thru BE-14-11005 BE-14-ll 007 PAGE 4 SERVICE BULLETIN Al-69 PART NO. AlO-4894 (Cont'd) Serial No. BE-14-ll 008 BE-14-ll01O thru BE-14-ll012 BE-14-ll014 thru BE-I4-ll016 BE-14-ll018 thru BE-14-11021 BE-14-11023 thru BE-14-ll027 BE-14-11029 thru BE-14-ll032 BE-14-11035 BE-14-11036 BE-14-11038 BE-14-ll040 thru BE-14-ll043 BE-l4-11 045 thru BE-14-ll047 BE-14-ll049 BE-14-11050 BE-I4-ll052 BE-14-11053 BE-14-ll055 thru BE-14-11064 BE-14-11067 BE-14-ll070 thTU BE-I4-ll074 BE-14-11076 thru BE-14-ll078 BE-14-ll081 thru BE-14-11084 BE-14-ll086 BE-14-ll088 BE-14-ll090 BE-14-ll091 BE-14-11093 thru BE-14-ll096 BE-14-11098 thru BE-14-11100 BE-I4-11102 BE-I4-11105 [hru BE-14-11107 PART NO. AlO-4894 (Cont'd) Serial No. BE-14-11109 thru BE-I4-11112 BE-14-11114 BE-14-11118 thru BE-14-11125 BE-14-11127 BE-14-11131 thru BE-I4-11138 BE-14-11140 BE-14-11141 BE-14-11143 BE-14-11145 BE-14-11146 BE-I4-11149 BE-14-11150 BE-I4-11152 BE-I4-11156 BE-14-11 160 BE-I4-11161 BE-I4-11163 BE-14-11167 BE-I4-11169 BE-l4-11172 BE-14-11173 BE-14-11175 BE-14-11 176 BE-14-11179 BE-14-11180 BE-I4-11 182 BE-I4-11184 thru BE-14-11188 BE-14-11190 thru BE-14-11192 BE-l4-11 194 thru BE-14-11196 BE-14-11198 BE-l4-11 199 BE-I4-11201 BE-I4-11205 thru BE-14-11207 BE-14-11209 BE-14-11210 BE-I4-11213 BE-14-11215 BE-14-11216 BE-14-11218 BE-14-11219 BE-I4-11221 BE-14-11225 PART NO. AI0-4894 (Cont'd) Serial No. BE-14-11227 thru BE-14011231 BE-14011234 BE-14-11238 BE-14011240 BE-14011241 BE-14011245 BE-14011247 BE-14011249 BE-14011250 BE-14011252 thru BE-14011255 BE-14011257 thru BE-14011261 BE-14-11263 BE-14011264 BE-1401I266 thru BE-14011269 BE-14oll271 thru BE-14-ll275 BE-14-ll277 thru BE-14-ll308 BE-14011310 thru BE-14011312 BE-14oll314 BE-14-ll315 BE-I4-11317 thru BE-I4-ll321 BE-14-11323 thru BE-14011BO BE-14-11333 thru BE-14-llB 5 BE-14011337 BE-14oll338 BE-14-ll340 BE-14-ll343 BE-14-ll345 thru BE-14011354 BE-14-ll357 BE-14-ll359 thru BE-14011365 BE-14011368 BE-14-11369 PAGE 5 SERVICE BULLETIN AI-69 PART NO. AI0-4894 (Cont'd) Serial No. BE-14-11371 thru BE-14oll375 BE-140113 77 BE-14011378 BE-14-11380 thru BE-14-11390 BE-I4-11392 thru BE-14011399 BE-14-11401 BE-14-ll402 BE-14-11404 BE-14-11405 BE-14-11407 BE-14-11408 BE-14-l1fll thru BE-I4-ll415 BE-14-11422 thru BE-14-11436 BE-14011438 BE-I4-1l440 BE-14-11442 tiE- I 4-11444 BE-14-11446 BE-14-11447 BE-I4-11586 BE-14-11606 BE-14-11655 BE-14-11663 PART NO. AlO-4895 Serial No. BF-14-3598 (15 ) thru BF-14-3612 BF-14-3614 thru BF-J4-3616 BF-1403619 thru BF-1403623 . BF-14-3629 ... " BF-14-3631 BF-I4-3632 BF-14-3637 BF-1403640 BF-14-3642 BF-I4-3644 BF-1403648 BF-14-36H MARVEL-SCHEBLER PRODUCTS D I V I.S ION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. March 2, 1966 Aircraft SERVICE BULLETIN IIAl-56 Subject: AD #64-27-2 and revision to AD #64-27-2 per amendment 39-175, part 39, Federal Register, January 4, 1966. To: All registered outlets Subject AD and reV1Slon amendment specify the use of our rubber floats and long-loc safety features and positive retraction float valve and--- AW, THE HECK WITH IT! imy DON't YOU READ YOUR COPY OF THE AD'S AND THEN COt1E BACK HLRE. I'LL WAIT. THANKS! If you have a carburetor to service with a serial number higher than that shown in this list, it will mean that all new features were included at the factory. A short pause is now in order, while you read an important commercial from our Engineering Department: Part No. 10-3103-1 10-3346-1 10-3565-1 10-3678-32 "When referring to aircraft carburetor serial numbers, disregard the center number, as this is used for our internal blueprint control only." Example: Carburetor AIO-3965-12 may have a serial number like this: Now, Disr8e~ H ___ 6094 '----""":'-:--~---:---,--..-~Use this number only back to the list: Serial No. Part No. Y-7-2215 10-3859-1 B-7 -205 10-3878 C-7-228 10-3965-12 A-5-5206 10-4025-12 Serial No. i1-5-284 G-6-1921 H-1l-4118 Z-2-1384 /lAl-66 Page 2 14arch 2. 1966 Part No. Serial No. Part No. Serial No. 10-4057-1 AI-2-107 10-4404-1 AO-3-995 10-4115-1 AV-2-1164 10-4438 -1 AH-4-767 10-4164-1 K-3-1696 10-4439 S-5-5846 10-4171 L-4-691 10-4495 AE-6-244 10-4218-1 AK-2-367 10-4783 BB-0-99 10-4233 P-6-303 10-4809 BA-0-99 10-4240 AU-2-142 10-4865 BC-0-99 10-4252 Q-6-1226 10-4893 BD-0-99 10-4401-1 AC-3-1399 10-4894 BE-0-99 10-4404 R-6-3319 10-4895 BF-0-99 If the carburetor you must service does not appear on this list. it should be opened to determine if the required parts have been installed before it arrived in your capable hands. After updating. stamp a small "64" near the bottom of the nameplate. ~~~""'ales l4anager RTM:amk MARVEL-SCHEBLER PRODUCTS DIVISION TO: SUBJEcr: BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. Aircraft SERVICE BULLETIN #Al-64 July 27, 1964 All Outlets Positive Retraction Float Valve and Seat Assembly For Models MA-3A, MA-3SPA and MA-4SPA A positive retraction float valve and seat design is now available for subject models. It is similar in function to the unit we now use on the MA-4-5 and MA-6 Models as described in Service Bulletin #A6-63. positive attachment of the float valve to the float will assure the valve being pulled off the seat when the float drops to admit additional fuel. The new part number is A233-615 which includes a new valve, new seat and clip #A29 -184. This retraction clip is easily installed as illustrated on the reverse side of this Bulletin. mr A233-615 will replace in service the following part numbers: A233-605 A233-554 A233-555 A233-557 A233-583 A233-551 The List Price of A233-615 - - - - - '$5.75 each Available from your Marve1-Scheb1er Distributor Marve1-Schebler Products Division I I \ I \ I \ I '- ./ "- - ---' \ FLOAT VALVE ASSEMBLY F L o A29-184 CLIP A \. T \ , - . . MARVEL-SCHEELER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT SERVICE BULLETIN December 23, 1964 ttA2-64 TO: All Outlets SUBJECT: Aircraft Condensed Catalog Form # MS-37l, November, 1964. Please make the following change: Or, listing carbureter A1O-4115-l the nozzle should be A47-799 -- List Price $4.10 How this error slipped through all that proof reading we will never know ~~ Many thanks to Bill Kellogg of Airmotive Carbureter Company for bringing this to light. Marvel-Schebler Products Division MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S, A. AIRCRAFT December 20, 1963 SERVICE BULLETIN #A6-63 TO: All Out lets SUBJECT: New Float Valve with Mechanical Attachment to Float CARBURETERS AFFECTED: All MA-4-5 and 6 Series An improved float valve mechanism which attaches the valve to the float is going into production on all subject carbureters. Positive attachment of the float valve to the float will assure the valve being pulled off the seat when the float drops to admit additional f~el. Some sticking has been reported, due to deposits from evaporated fuel and other foreign materials. The attachment clip is easily installed and held in place by the float shaft, as shown in the illustrations on the reverse side of this bulletin. The new part number is A233-6l4 float valve, seat and clip assembly which will replace part number A233-606. A233-614 List Price $7.60 Available from your Marvel-Schebler Distributor. MARVEL-SCHEBLER PRODUCTS DIVISION mr (See Illustrations on Reverse Side) - - - .. - - -- - -- -~- - - -- , --FLOAT IN / -I LOCKOFF ) POSITION > I \ I ------- - - , '- A29-182 FLOAT CLIP BOTTOM VIEW OF THROTTLE BODY MS.---L.(J[,~~'l:~K/ / / ,/ J-S...J-L-..Jf:~, ,J _-- 0/ - ----------------A29-182 CLIP IN PLACE - - FLOAT IN OPEN POSITION Marvel-Schebler Products liivlslon, Borg-Warner Corporation, Decatur, Illinois, U. S. A. MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER' CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U, S, A. AIRCRAFT SERVICE BULLETIN IIA5-63 TO: All Outlets SUBJECT: Safety Wire Feature Added to Bowl to Body Screws Carbureters Affected: All Models We have received some report's that the throttle body to bowl screws can become loose in operation. I To prevent any possibility of these screws 'backing out, _lL-S_afety wire cross hole must be drilled in the screw head and the screws safety wired in the manner shown on the reverse side of this Bulletin-: Starting in October, 1963, all production carbureters will include the safety wired screws. MARVEL-SCHEBLER PRODUCTS DIVISION mr MA 4-5 & 6 SERIES ® § TO PREVENT INTERFERENCE WITH MIXTURE CONTROL DO NOT SAFETY BETWEEN THESE SCREWS, MA 3 & 4 SERIES 00 0 L o DRILL A liB HOLE IN THE CENTER OF THIS CASTING WEB, RUN SAFETY WIRE THRU THIS HOLE, o -,,--------------------------- Marvel-Schebler Products Division, Borg-Warner Corporation, Decatur, !!!i!'!ois, U. S. A. MARVEL-SCHEELER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT October 3, 1963' SERVICE BULLETIN #A4-63 TO: All Outlets SUBJECT: IMPROVED VENTURII FOR ALL MODEL ~~-4-5 CARBURETERS We have been producing our Model MA4-5 Carbureter for over twenty years for several models of Lycoming, Continental and Franklin Engines in a variety of airplanes. Horsepower has increased over a period of years and the resultant changes in vibration patterns as a result of higher compression, improved cams, etc., plus the softer engine mountings ,our carbu- reter has been getting the "shakeslf • The first change was from the all metal float to the shakeproof rubber version. Now it has become necessary for us to tlbeef up" our venturii. We are now casting the main and primary venturii in one piece. This will prevent any possibility of the primary venturi from vibrating loose. It is our recommendation that the next time the engine is being overhaule~d or the next time the carbureter is removed, that the new one piece venturi be installed. A Special Tool CM-512) is required. Three new venturii part numbers cover the entire application. Check this part or your parts list, locate the main venturi part number and replace it with the new assembly. Old Style Main Venturi 46-A30 46-A63 m6-49~ New One Piece Venturi 46-A228 46-A227 (46-A226) Since we are discontinuing the use of two piece venturii, they will no longer be available for service. It will be necessary to order the complete unit. Page 1. INSTALLATION PROCEDURE Disassemble the throttle body and clean thoroughly so that it can be inspected for cracks or excessive wear (throttle shaft· bushings may require replacement at this time). Use an Arbor Press (DO NOT USE A HAMMER). Place the throttle body in its normal position and press out the old venturi with the plain end of Tool M-512. Figure 1. PRESS OUT OLD VENTURI FROM THIS DIRECTION TOOL M-512 OLD STYLE VENTURI USE AN ARBOR . PRESS ONL Y DO NOT HAMMER FIGURE 1 Clean and inspect the press· fit area in the throttle bore. Invert the throttle body and position the new venturi so that the tang on one of the three legs will line up with the groove on the casting. Figure' 2. Page 2. MAKE SURE THIS TANG FITS IN FIGURE 2 Position the 3 slots on the machined e.ndlof Tool M-512 over the 3 legs of the primary venturi and press the assembly in firmly until the tool shoulders pn the casting. Figure 3. Reassemble the carbureter in accordance with standard procedure replacing all worn parts as needed. Use all new gaskets. It will no longer be necessary to use the Venturi Clips A29-113 with the new assembly. Stamp the nameplate near the bottom with a small "V" to show that this improvement has been incorporated. Page 3. r-----:--::-:-::---------------i'c,;. USE AN ARBOR PRESS ONL Y DO NOT HAMMER ,TOOL M-512 PRESS IN FIRMLY TO SHOULDER ON TOOL NEW STYLE' VE N T URI """'L.lU FIGURE 3 New venturii and Tool M-5l2 are available from your Marvel- Schebler Distributor. PART NO. M-5l2 Tool A46-A226 A46-A227 A46-A228 PRICE $21.50 Net 7.90 List 7.90 List 7.90 List 'All Production Units after October 15, 1963, will be equipped with the one piece venturi and will include the "Y" on the nameplate. MARVEL-SCHEBLER PRODUCT~ON / Page 4. MARVEL-SCHEDLER PRODUCTS DIVISION BORG-WARNER CORPORATION TO: SUBJECT: MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U.S. A. AIRCRAFT SERVICE BULLETIN IIA3-63 All Outlets Modifying the 0-360 Lycoming Carbureter Part IIA10-3878 into A10-3878-M. Application Piper Cherokee March 12, 1963 Improved performance can be obtained by modifying the above unit with kit number A666-660. The same parts and instructions apply as stated in Marvel- Schebler Bulletin A-ll-62. Please mark your records accordingly. MARVEL-SOlliBLER ~ s"e"y....""'-""'" Service Sale mr MARVEL-SCHEBLER PRODUCTS DIVISION TO: ;5UBJECT: BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. . AIRCRAFT SERVICE BULLETIN #A2-63 ALL MANUAL HOLDERS ECONOMIZER SETTINGS January 24, 1963 Please find enclosed, revised pages 13, 14 and 15 for your Overhaul Section of Model MA-4-5 and 6 in your Aircraft Manual." Up to date Economizer Settings, using M-94 Gage and using a Depth Micrometer are on Pages 14 and 15. Please remove the old sheets from your Manual and insert this new mailing. MARVEL-SCHEBLER PRODUCTS ION mr " Corrected sheets are inserted in this l"ianual. MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT SERVICE BULLETIN #Al-63 TO: All Outlets SUBJECT: NEW FLOAT VALVE ASSEMBLY A233':'606 (REPLACES A233-580) January 18, 1963 A vastly improved float valve and seat assembly for our MA-4-5' Series Carbureter has just been put into production. It incorporates a VITON TIP on the needle similar to the valve now used in our MA-3-4 Series. (A233-605 Bulletin A2-62) FLOAT VALVE & SEAT NYLON INSERT MODELS AFFECTED: M~-4-5, MA-4-5AA, plus all Repair Kits and Long- Lok Kits applicable to the above Models. Disposition of A233-580: Use until your present stock is exhausted. (Over) The list price of this new A233-606 is $5.10. Price List corrections as a result of this.new part: Repair Kit It New Price Long-Lok Kit It New Price A286-1209 $ 34.50 A666-651 $ 12.75 A286-950 31.85 A286-783 22.35 A286-939 31.85 A;"l86-815 21.15 A286-972 24.75 A286-1190 31.35 A286-1100 32.70 A286-1139 31.95 A286-1189 32.45 A236-l384 33.05 A286-l237 31.95 A286-l304 37.35 A286-l397 33.00 A286-l286 37.00 A286-1380 30.40 A286-1394 38.95 A286-1398 ·41.20 A;,86-l405 37.00 Please mark your records accordingly. MARVEL-SCHEBLER PRODU~~~~ION mr MARVEL-SCHEELER PRODUCTS DIVISION TO: SUBJECI: BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U.S. A. AIRCRAFT SERVICE BULLETIN ItA12-62 All Outlets Improved Seal for Manual Mixture Control November 7, 1962 We are improving the method of sealing the Mixture Control Valve in the throttle body of all our aircraft carbureters equipped with the Manual Mixture Control. In each gasket set (and/or) repair kit, we are replacing the A16-47l !!Jr A16-A28 fibre gasket with a "V" block rubber packing, part ItA44-190 installed in the manner shown on reverse side of this bulletin. Please incorporate this information into your repair procedure~ MARVEL-SCHEBLER PRODUCTS DIVISION See Reverse Side for Illustration ; I i / / / / TYPICAL CARBURETER WITH MANUAL MIXTURE CONTROL MIXTURE CONTROL LEVER MIXTURE CONTROL SPRING MIXTURE CONTROL WASHER MIXTURE CONTROL PACKING PAR T # A44-190 INSTALL IN THIS POSITION THROTTLE BODY HORSESHOE WASHER· MIXTURE CONTROL VALVE Marvel-Schebler Products Division, Borg-Warner Corporation, Decatur, iiiinois, U. S. A. MARVEL-SCHEBLER PRODUCTS BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. DIVISION AIRCRAFT July 2, 1962 SERVICE BULLETIN #All-62 TO: All Outlets SUBJECI: Field Modification of AlO-3878 Aircraft Carbureter into AlO-3878-M 'As Applied to Mooney Aircraft Only. Jmproved performance can be realized by field modifying the AIO-3878 carbureters used on the Lycoming 0-360-AlA and 0-360-AID Engines used in·Mooney Aircraft Models M20B and M20C, Serial Nos. 1701-2296. This conversion can be accomplIshed by any A & P with standard shop tools and kit #A666-660. A666-660 Kit Contains One Each .~. Part No. Part Name 1 2 3 4 5 6 7 8 9 10 A16-A31 A16-A30 A16-A56 A16-A42 A47-755 #9 Drill A60-A127 A229-589 A66-20 A298-1 Bowl Gasket Nozzle Gasket Economizer Gasket Power Jet Gasket Nozzle Assembly ( .196) Nozzle Vent Bushing Idle Tube Economizer Safety Wire Economizer Lead Seal INSTRUCIION SHEET All-62 • Due to changes in the casting, in some instances it will be necessary to bore nozzle vent channel as shown for the A60-A127 restriction bushing. drill (.196) is supplied in the kit for this purpose. (OVER) counter- A #9 Bushing A60-A127 (l] I Cross "ection view Bottom view of throttle t.oCI casting of nozzle vent channel Very carefully counterbore this channel to a depth of 7/16" using the #9 drill. CI¢an out all chips after drilling ~clean this channel by removing the economizer plug and blowout with compressed air with the throttle valve in a closed position). Very carefully press in place bushing #A60-AI27 flush with the casting face, avoid any burrs which could change this restriction. While the carbureter is down for modification be sure to comply with the long-10k safety features required in AD-62-4-2. Reassemble the carbureter using the new nozzle A47-755, Idle tube A229-589 and use the new gaskets supplied in kit. Re~et the economizer usinG M_lq plus l~ turns. St~mp a small "M" Thus: f\1(L~~i8-M on thE' na:ne plate to identify the conversion. Kit IIA666-660 is availablf'· from your Marvel-Schebler Distributor at $12.80jeach· list. MARVEL-SCHEBLER PRODUcr~-u~ISION mr MARVEL-SCHEBLER PRODUCTS BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. DIVISION AIRCRAFT June 14, 1962 SERVICE BULLETIN IiAlO-62 TO: All Outlets SUBJECT: Improved Installation of Long Lolc Type Screws It is recommended, when using long 10k type screws, that the tapped hole in the casting be chamfered. Use a countersink or large drill to chamfer (approximately 45 0 ) to the screw major diameter. COUNTERSINK OR DRILL 45 0 CHAMFER LONG-LOK SCREW Please advise all parties concerned. MARVEL-SCHEBLER PRODUCrS DIVIS ION Service Sales mr MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U, S, A. AIRCRAFT June 14, 1962 SERVICE BULLETIN #A9-62 TO: All Outlets SUBJECT: Aircraft Carbureter Overhaul Frequency During ou:: teardown and inspection of carbureters sent in to 'us for overhaul, we find that a large percentage of the units have very obviously been operated on an engine far more hours than a normal engine overhaul period. After engine overhaul in the field, it would appear that many stations are returning the carbureter to duty with little other than an exterior cleaning~ In many cases the throttle shaft has worn completely through the bushing, which of course scraps the casting. The old theory, "If the carbureter is working okay, don't touch , itt', cannot apply to aircraft. After overhauling and inspecting thousands of units at the factory, we see the need for the following recommendation: NO OVERHAULED ENGINE SHOULD BE RETURNED TO SERVICE WITHOUT COMPLETEL Y OVERHAULING THE CARBURETER IN ACCORDANCE WITH MANUAL PROCEDURE! MARVEL-SCHEBLER PRODUCIS DIVISION mr MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. A I R C R AFT SERVICE BULLETIN April 24, 1962 #A8-62 TO: All Outlets SUBJECT: Precautionary procedure to be used when installing Viton-tipped float valve assemblies - all models. After installing the float valve and seat assembly and setting the float to the required clearance, hold the throttle body in its normal position and observe the float valve to see that it is free in its seat and con- tacts the float lever when the float is down. Do not force the needle against its seat. OVER MARVEL-SCHEBLER PRODUCTS DIVISION ~ ~~kIV( ~: JM~ss'e;"'" Service Sales na r M-ARVE1-SCHEB1ER PRODUCTS DIVISION TO: All Outlets BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U, S. A. Aircraft SERVICE BULLETIN itA? -62 April 16, 1962 SUBJECT: Float Bracket Mounting Screw Holes - Refer to Bulletin ItA4-62 When complying with the mounting instructions of the aircraft carbureter float bracket screws as outlined in Bulletin ItA4-62, use a Bottoming Tap as shown in the diagram below. You may find in carbureters built previous to 1952 that a 4-36 screw was used to fasten this bracket in place; in this case, our Engineering Department has thoroughly tested and approved the procedure to retap the mounting holes with a 4-40 Bottoming Tap for the 4-40 Long-10k screws now used. j ",. , ",. o --- USE A 4-40 BOTTOM TAP, OR GRIND OFF A PLUG TAP TO MAKE A BOTTOMING TAP. -_Or ---, 9/32' - - _J._ FLOAT BRACKET MOUNTING HOLES MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U, S. A. April 9, 1962 Aircraft SERVICE BULLETIN #A6-62 SUBJECT: Aircraft Service Tools - Prices To become effective April 15, 1962 (supersedes prices on Bulletin #11-59) Ref. # Tool # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ;}5 26: 27 28 M-3 * M-7 * M-12 M-13 M-82 M-83 M-84 M-86 M-94 series M-95 M-96 M-98 (same as M-122) M-100 M-101 M-102 M-102A M-103 M-104 M-105 M-105A M-106 M-107 M-108 M-109 M-120 M-121 M-122 M-123 M-123A Tool Name Nozzle Wrench (9/16") Nozzle Wrench (1/2") Socket Extension Socket Extension Handle Main Venturi Extracting Sleeve Primary Venturi Assembling Tool Main Venturi Assembly Tool Throttle Shaft Bushing Driver Air Metering Pin Gage Tool Throttle Shaft Bushing Reamer Throttle Shaft Bushing Driver Throttle Valve Bolt Peening Arbor Primary Venturi Assembling Tool Main Venturi Extractor Main Venturi Extractor Yoke Float Valve Seat Remover Float Valve Seat Remover Throttle Shaft Packing Tool Throttle Shaft Packing Tool Arbor Main Venturi Assembling Tool Throttle Valve Bolt Peening Tool Throttle Shaft Bushing Reamer Throttle Valve Bolt Clincher Main Venturi Extractor Main Venturi Assembly Tool Throttle Shaft Bushing Remover Pump Stem Packing Stake Punch Pump Stem Packing Stake Pilot * See our Bulletin #A5-62 Net Price $16.00 16.00 11.50 5.00 12.50 8.50 9.50 7.00 18.50 14.50 9.00 10.50 ~.OO 24.00 9.50 18.50 18.50 9.25 6.00 9.00 6.75 14.50 38.00 9.00 6.75 11.00 23.00 8.00 THESE PRICES WILL BE IN EFFECT UNTIL A NEW BULLETIN IS ISSUED. (Illustrations with reference numbers on reverse side.) Aircraft Carbureter Service Tool.---- .. ~ ~ I I 1 ?I 9 ~1 17 2 I 23 10 I3 ~I 11 I 18 j I 4 ~ 19 I 5 ; ! 15 ,:-.. ~- ~I 12 © I 24 I20 I6 @)I 13 F o I25 I 21 I1 , 14 1l~Q~591 o I 26 I I n ~I I15 18 i- n 22 l I I21 MARVE1-SCHEB1ER PRODUCTS DIVISiON MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. Aircraft SERVICE BULLETIN #A5-62 April 4, 1962 TO: All Outlets SUBJECT: Aircraft Service Tools - M-3 and M-7 In order to save you a considerable amount of money, we recommend that the following commercial socket wrenches be used to replace our M-3 and M-7 Aircraft Tools: When you require the M-3, 9/16" Nozzle Socket for Models MA-4-5 and -6 series, use instead a commercial socket such as Snap-On #SF-181, or equivalent. When you require the M-7, 1/2" Nozzle Socket for the Models MA-3 and -4 series, use instead a Snap-On #SF-161, or equivalent. Please mark your purchasing and service records accordingly. MARVEL-SCHEELER PRODUCTS l!J.-"""'>-!..\,J J MARVEL-SCHEELER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY April 2, 1962 DECATUR, ILLINOIS, U, S. A. Aircraft SERVICE BULLETIN IIA4-62 TO: All Outlets SUBJECT: Float bracket mounting - All Models Please consider the following paragraph as a part of Bulletins A2-62, 15-60, and 9-60_ Also, as a part of the instruction' sheet included with Long-10k Kits; A666-651 and A666-652: j IMPORTANT Before installing the float bracket with the two Part IIA15-A21 Long-10k screws, retap both the mounting holes with a 4-40 tap, 5/16" deep. MARVEL-SCHEBLER PRODUCTS DIVISION Ch~~Service Sal MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. March 22, 1962 Aircraft SERVICE BULLETIN #A3-62 TO: All Outlets SUBJECT: New Parts Lists and Price Correction. Please add the two enclosed new parts lists, A10-4218 and A10-4218-l to the Lycoming Section of your Manual. These two tini ts are used on the Lycoming Model VO-540-B1A. Also, please change the price of A666-652 to read $9.65 each list. The price of $8.20 as shown in Bulletin #A2-62 is in error. This !cit includes the new Viton float valve and seat assembly A233-605. Thank you. j encl. MAR VEL-SQiEBLER PRODlJ8'5-lIW.[JS ION ssey Service Sales MARVE1-SCHEB1ER PRODUCTS BORG-WARNER CORPORATION MAUl OFFICE AND FACTORY DECATUR. ILLINOIS. U. S. A. DIVISION Airc raft March 15, 1962 SERVICE BULLETIN IIA2-62 TO: All Outlets SUBJECT: New Float Valve & Seat _ A233-605 A greatly improved float valve and seat assembly has just been put into' production, part IIA233-605. The valve portion incorporates a VITON TIP which gives much better lockoff, will improve the service life, and reduced inventory! FLOAT VALVE &: SEAT NYLON INSERT MODELS AFFECTED: MA-2, MA-3 series, MA-3SPA, and MA-4SPA, plus ALL Repair Kits and Long-10k kits applicable to the above models. The list price of this new IIA233-605 will be $4.50. #A233-605 will replace; A233-551 A233-554 A233-555 A233-557 A233-583 (over) Price List corrections as a result of this improved seat: Part II List Price A286-813 $13.35 A286-838 20.80 A286-839 13.10 A286-949 21.65 A286-970 23.55 A2S6-971 14.55 A286-974 19.50 A286-1035 23.30 A286-1036 22.70 A286-1063 18.65 A286-1070 23.20 A286-ll93 25.20 A286-1215 14.80 A286-1216 14.80 A286-1273 24.30 A286-1274 24.50 A286-1275 24.50 A286 -1285 18.65 A286 -1357 25.90 A666-652 8.20 Please mark your records accordingly. An improved float valve and seat assembly for the larger MA-4-5 and -6 will be available in approximately 90 days. MARVEL-SCHEBLER j MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT February 19, 1962 SERVICE BULLETIN IIAl-62 TO: All Outlets SlJBJECT: Part 1110-3339 - no longer available. The subject carbureter was one of our old automotive downdraft replacement units, modified for use on a jet engine ground starting device, powered with a Lycoming engine. This carbureter ~ ~ longer available. It will be necessary for you to advise the outlets who call on you for this carbureter to contact Lycoming, as they have a recommended replace- ment. We have one hundred eighty-eight (188) part IIA286-953 repair kits, as the total remaining service support stock. No castings ~ available. We will continue to supply repair kits only, until such time as the 188 kits are gone. No small parts ~ available. Please advise your purchasing department accordingly. MARVEL-SCHEBLER PRODUCTS DIVISION j MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY November 24, 1961 DECATUR, ILLINOIS, U. S. A. Aircraft SERVICE BULLETIN #A7-61 TO: All Outlets Please replace the two Catalog pages in the Overhaul Section with the two revised pages enclosed. Also, make the following changes in your Price List dated June 1, 1961: On page 1 under Throttle A12-982 priced at $1.50. listed correctly beneath Levers, please cross out part The correct price of $3.10 is the one in error. On page 2 under Gaskets, A16-222 is Nor replaced by A16-A17. A16-A222 IS replaced by A16-A17. On page 4 under Bellows Assemblies, part A293-524 should be changed to read: Use A666-640. Under Kits, A666-640 should show the new list price of $80.85. ---- Thank y~u for incorporating these changes. MARVEL-SCHEBLER PRODUCIS DIVISION j encl. **Revised Sections Inserted in this Catalog. MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A, October 25, 1961 Aircraft SERVICE BULLETIN .\IA6-6l TO: All Outlets SUBJECT: Change to solid Rubber Float on Models MA-3, MA-3SPA and MA-4SPA. All subject model carbureters are now being produced with the new Part #A30-628 solid rubber (closed cell) float. This inrrovement has been approved by Lycoming, Continental, and the F. A. A. Effective immediately, all service orders will be filled with the new version. The metal A30-628's are still suitable for service until present distributor's stocks are u3ed up~ j The same part number will be retained. The new list price for the new long lasting float will be $4.60 each. MARVEL-SCHEBLER PRODUCTS DIV. c MARVEL-SCHEELER PRODUCTS DIVISION' BORG-WARNER CORPORATION MAIN OFFICE AND S:ACTOlty DECATUR, ILLINOIS, U, S, A, NO. AS-61 October 9, 1961 SERVICE BULLETIN TO: ALL DISTRIBUTORS . SUBJECT: Model MA 4-5AA Automatic Altitude Bellows Ass 'y. CARBURETER, AFFECTED: Part No. AIO-3847 A change has been made in the design of our Altitude Bellows Assemblywhichaffects servieing subject carbureter. When it is neces sary to replace the old A293-5l8 assemblies in the above units - - USe Kit Number A666- 658 which contains the follow- ing parts: Sym. A B C Part # Part Name A83-479 Stud, Bellows A24-A126 Spring, Bellows A293-5l8 Bellows Assy Assemble as illustrated, turning in the bellows firmly against the "0" ring. USING FINGERS ONLY --CAUTION-- DO NOT DISASSEMBLE OR ATTEMPT TO ADJUST. THIS UNIT CAN BE SET ONLY AT THE FACTORY. All other overhaul instructions pertaining to this model are unchanged. Always check the float setting (13/64"). Use new gaskets when servicing any carbureter • . ~-.~R. T. MasseyUV Service Sales Manager MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. June 23, 1961 AIRCRAFT SERVICE BULLETIN A4-6l TO: ALL OUTLETS SUBJECT: Converting Part #A10-4401 into Part #A10-440l-l Some "rough engine" reports from the field on the Lycoming VO-540 series engines with dual carbureters as used by Hiller can be corrected by add- ing the parts in Kit #A666-657 to subject carbureter. This will change the calibration to a -1 setting now in current production. Kit A666-657 contains: 1 - A16-B12 Bowl Gasket 1 - A24-A30 Spring Metering Pin 1 - A49-l99 Metering Pin 1 - A60-A138 Bushing - Bowl Vent 1 - A173-l44 Jet - Metering Pin 1 - Instruction Sheet Separate castings, and with a soft hammer drive the A60-A138 bushing in bowl vent channel as shown (Figure 1). Replace the air metering pin jet and spring assembly with the A49-199 jet, A173-l44 pin, and A24-A30 spring; and set to the M-94 gage plus l~ turns (Figure 2). Re-assemble carbureter with new A16-A3l gasket, and stamp a -1 after the A10-440l. Kit #A666-657 is available from your distributor at $7.50 List Price. MARVEL-SCHEBLER PRODUCTS DIVISION Service Sales j (See Figures 1 and 2 on reverse side.) A60-Al3S o FIGURE 1 A24-A30 A49-199 FIGURE 2 MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AmCR.AF.r Mly 24, 1961 SERVICE BULLETIN # A3-6l TOI ALL ACCOUNTS SUBJECT I n-t Valve and Seat Assemblies for Mlrvel-Schebler Aircraft Carburetors. All part # A233-555 float valve and seat assemblies used on various models of MA-3 &-4 carburetors are being replaced with part # A233-583 which has a neoprene ineert in the Ha-t. All part Ii A233-556 float valve and seat assemblies used on various models of MA-4-5 and MA-6 models are being replaced in service with part # A233-580 which has a neoprene insert in the seat. Part # A233-59l which is used in various MA-4-5 and -6 models is identioal to part # A233-580 except that a rubber cure date has been added to the package. . ,.... " Please mark your records accordingly. Very truly yours. MARVEL-SCHEBLER PRODUCTS DIVISION MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S, A, Aircraft SERVICE BULLETIN #A2-6l Subject: Field Conversion of Model MA-4-5, part #AlO-4025-ll into part #AlO-4025-l2 Improved performance can be obtained by field converting the AlO-4025-ll calibration into the AlO-4025-l2, which is the current production calibration. This can be accomplished by any "A & P" with standard shop tools using the following kit and instructions: 119 CONVERSION KIT Part #A666-654 To convert AlO-4025-ll into part AlO-4025-l2 ~ • ~ 0 DRILL A229-599 A60-A137 IDLE TU[JE [JUSHINJ KIT CONSISTS OF: Part No. 1. #9 Drill.196 2. A60-A137 3. A16-A3l 4. A229-599 Part Name Bushing, Nozzle Vent Bowl Gasket Idle Tube A16-A31 GASKET It is necessary to disassemble the carbureter and counterbore the nozzle vent channel as shown, for part A60-A137 restriction bushing. Bushing A60-A137 m1I Cross section view 7/16" Bottom view of throttle body casting of nozzle vent channel Very carefUlly counterbore this channel to a depth of 7/16" using the #9 drill in the kit. Clean out all chips and foreign material after drill- ing. (Clean this channel by removing the economizer screw plug and blow out with compressed air with the throttle valve in a closed position.) Very carefUlly press in place bushing A60-A137 flush with the casting face. Avoid any burrs which could change the restriction. Reassemble the carbureter using the new idle tube A229-599, and gasket AI6-A31. Stamp a dash two (-2) over -ll, and the carbureter will be updated to the latest calibration. Kit A666-654 is available from your Marvel distributor at $ 6.00 each list. MARVEL-SCHEBLER l'ROpucr:::;:.;S~~V,I.S ION ~ss~e'~y~~~~ Service Sales '---- j MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OfFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. February 20, 1961 AIRCRAFT SERVICE BULLETIN #Al-6l TO: ALL MANUAL HOLDERS SUBJECT: Part #AI6-A31 Body to Bowl Gasket for all MA-4-5, 6 and AA Models. Several years ago a change was made in the subject gasket, both in material and in dimensioning. The material was changed from Ko~ko~~ to Lexide to assure better sealing and better storage charact~tics'; At the time of the change, two air passage holes were changed for additional coverage. (See view on reverse side.) Apparently some old surplus gaskets are being used for repair in the. field. These will not work and should be discarded. Use the new Lexide A16-A31 with the elongated pump clearance hole and nozzle air vent hole when repairing all the subject model car- bureters. Dispose of all of the old Korkoid gaskets. Please pass this information on to all members of your organization who are involved in the repair of our carbureters and the handling of our service parts. Very truly yours, MARVEL-SCHEBLER PRODUCTS DIVISION j o o o o o o 0° .),,~"" 0 0 o o o OLD STYLE KORKOID GASKET NEW STYLE LEXlDE GASKET DO NOT USE FOR ANY MA 4-5 REPAIRS "NOTE THE TWO AIR PASSAGE HOLE CHANGES" MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT December 22, 1 0 60 SERVICE BULLETIN 1118-60 TO: All Outlets SUBJECT: Seals on Model MA-4-S, MA-6 and AA Series Carburetors DUring the past few months we have had occasion to Tltrouble-shoot" and overhaul quite a few subject model carbureters. In many cases we found the "rough engine-lean" complaint to be worn out or neglected throttle shaft inner seals, or packings~ SEE THROTTLE VIEW ON REVERSE SIDE When operating at part throttle, a high vacuum condition exists above the throttle valve. If the "0" ring packing is worn out, this will allow the high manifold vacuum to be transmitted directly down through the pump linkage passage into the fuel [Jowl. In extreme conditions, this can hold fuel back from the nozzlp, creating extensive leanness! A worn out, outside "0" ring packing can cause a rich condition by allowing free air to counteract the economizer systc~. Always replace these two important seals whenever thp carburcter is serviced, and pass this information along to your "troublC'-shootcrs". Happy Holidays. MARVEL-SCHEBLER PRODUCTS DIVISION (. /~~ ~ /~ ~~ey~Service Sales M~ j (See reverse side) " \- Model MA-4-5 Sectional View 0,'1""" .... \ ... 5 ..'" ( ( aoj~G ." ...'\il!'l~:\ :::'O;;:>'J:I":" t 10 <; \~ § ? HIGH lvLANIFOLD VACUUM AREA ;' BUSHING L"\SlDE "0" RING u::::::::::::; -:::::;:::;; <I' PASSAGE TO FUEL BOWL r//1 PUMP LINKAGE OPERATES IN THIS SPACE. BUSHING OUTSIDE "0" RING THROTTLE SHAFT MODEL MA-4-5, MA-b & AA SZRIES THROTTLE BODY I RETAINERs! MARVEL-SCHEDLER PRODUCTS BORG-WARNER CORPORATION TO: All Outlets MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U, 5, A. Aircraft SERVICE BULLETIN 1117-60 SUBJECT: Bulletin 1113-60 "Servicing Automatic Altitude Carbureters in the Field" DIVISION NOV 10 1S60 Subject Service Bulletin 1113-60 recommended that Marvel- Schebler Aircraft Carbureters equipped with the bellows altitude control, be serviced at the factory when the bellows circuit is involved. This recommendation apparently imposed a burden on the operator using these models, as few can carry a spare carbureter in stock,. It is perfectly satisfactory for authorized service personnel. to replace the bellows during ovc'rhaul. The reason for issuing Bulletin 1113-60 was that we were notified that operators and their service people were altering the bellows settings in the fi('lLl. This cannot be done successfully in the field and still maintain tl,e fllel-air ratios established by the manufac- turer. Therefore, when the trouble in the carbureter has been pin~ pointed to the bel10ws, change the ill,it complete, don't attempt to disassemble and 'Jjust in the field. Thank you fqr your cooperation. MARVEL-SCHEDLlm PRODUCTS es MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. Aircraft SERVICE BULLETIN 1116-60 November 8, 1960 TO: All Outlets SUBJECT: "FAClDRY STANDARDS" There is a tremendous amount of hard work, sound research and testing performed to establish "FAClDRY STANDARDS". Altering the carbureter from standard in order to "improve" perform- ance can be a hazard to airworthiness, and also a costly practice. All that any A & E should ever do is to make the particular engine he is working on as good as the manufacturer intended it to be~ But, he can make it a lot worse. Fuel consumption of an engine is arrived at by careful research. While it is always desireable to use less fuel, mixtures must be main- tained within the detonation limits established for each particular engine- fuel combination. Some of our calibrations are built to deliver mixtures up to 15% richer than best power. On the surface this would appear to be bad carburetion ----, but there are sound reasons for this which cannot be changed without affecting such important factors as engine life, cooling, safety, etc. Marvel-Schebler is committed to supply carbureters to the engine manufacturers' specifications, using sealed tested masters as a guide. Any change in fuel delivery must be requested from and authorized by the engine, or airframe manufacturer. What generated this refresher bulletin on Factory Standards? An operator of two helicopters ---- upset about fuel delivery, when the engines were equipped with carbureters we developed for the Ranger inverted 6 cylinder engine in 1941. The right carbureter, but with the wrong engine and airplane attached. ~~RVEL-SCHEBLER PRODUCTS DIVISION Service Sal s es MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR",-ILLINOIS, U. S. A. November 3, 1960 AIRCRAFT SERVICE BULLETIN #15-60 TO: All Outlets SUBJECT: . Up-dating Aircraft Carbureters With further reference to our Aircraft Service Bulletin #9-60, we are pleased to announce the availability of Long-10k up-dating kits for all models. These kits will eliminate the need for solder safetying the float valve and seat to the float bracket screws. It will also eliminate the special safety washers, and necessity of cotter pinning the bowl cover screws. A considerable savings of time and trouble during inspection and overhaul periods. The kit will contain new Long-10k float valve and seat assembly, float bracket, washers, Long-10k float bracket screws, and bowl cover screws. Kit #A666-65l will service the Model MA-4-5 and -4-5AA series. Kit #A666-652 will service the Model MA-3SPA, MA-4SPA series. The above two kits will service about 95% of all the Marvel-Schebler Aircraft Car- bureters produced for the last 20 years. Kit #A666-65l List Price $ 9.80 Kit #A666-652 List Price $ 7.20 Available thru your Marvel-Schebler Aircraft Distributor. j MARVEL-SCHEBLER PRODUCTS DIVISION -"7 (over) Installation of Long",Lok safety features, In Marvel ... Schebler Aircraft Carbureters FLOAT VALVE & SEAT NYLON INSERT THE FLOAT VALVE AND SEAT ASSEMBLY, FLOAT BRACKET SCREWS, AND BOWL COVER SCREWS ARE NOW LONG-LOK TYPE AND REQUIRE NO ADDITIONAL SAFETY. DO NOT SOLDER THE VALVE TO THE FLOAT BRACKET. _ NYLON -= """""-INSERT LONG-LOK BOWL COVER SCREWS DO NOT REQUIRE LOCK WASHERS, SAFETY WASHERS, OR COTTER PIN. REFER TO BULLETIN #15-60 FOR APPLICATION. STAMP A SMALL "L" ON NAME PLATE AFTER INST ALLA TION_ MARVH·SCIHBLER PRODUCTS DIVISION BORG·WARNER CORPORATION DECATUR, ilLINOIS MARVEl-SCHEBLER PRODUCTS BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. DIVISION Aircraft October 3, 1960 SERVICE BULLETIN 1/13-60 TO: All Outlets SUBJECT: Servicing the Automatic Altitude Models MA-4-5AA and MA-6AA Carbureters in the field. Due to the lack of test equipment, it is very unlikely that proper overhaul of subject carbureter models can be accomplished in the field. It is, therefore, recommended that all Model MA-4-5AA and MA-6AA (Automatic Altitude) be serviced at the factory only, when the repair would involve the Altitude Bellows fuel metering circuit. Routine service not involving the Altitude metering circuit may be accomplished in the field. MARVEL-SCHEBLER PRODUCTS DIVISION S e!Ovice J MARVEl-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFIce AND FACTORY !lECATUm. ILLINOIS, U. S. A. Aircraft October 3, 1960 SERVICE BULLETIN 1112-60 To: All Outlets subJect: Cotter pin safety added to pump link. Models Affected: All Model MA-3 & 4 series. All the pump links used on subject Models with a safety hole drilled at both ends. be cotter pin safe tied at both ends. will now be supplied This link is now to COTTER PIN HERE j MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR. ILLINOIS. U. S. A. AIRCRAFT October 3. 1960 SERVICE BULLETIN 1111-60 TO: All Customers SUBJECT: Identifying Long-10k float valve and seat We have identified the Long-10k float valve and seats by stamping an "L" on the top in two locations. This will prevent the inadvertent solder safetying of this assembly. It is no longer necessary. MARVEL-SCHEBLER PRODUCTS DIVISION j MARVEL-SCHEDLER PRODUCTS DIViSION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY June 27, 1960 DECATUR, ILLINOIS, U, S, Ai AIRCRAFl' #10-60 SERVICE BULLETIN TO: All customers SUBJEcr; Long-10k Parts Refer to Service Bulletin #9-60 The Long-10k safety feature has also been incorporated on the Model MA-4-5 and 6 economizer jet. As the tolerances have been modified slightly to incorporate the Long-10k, we want all economizer jets in your stock sent to the factory for exchange. Part Numbers affected are #A49-l99 and #A49-267 . .Our records show that this is a slow-moving part, consequently, not too many are in the field stock. \ Don't go to the expense of issuing debits and purchase orders, just drop the parts in a mailing bag to us and we will exchange them by return mail. Thank you for your cooperation. MARVEL-SCHEDLER PRODUCTS DIVISION ~%ey~1IIlIL41Service Sale_~~~~ j MARVEL-SCHEELER PRODUCTS DIVISION TO: ALL CUSTOMERS BORG-WARNER CORPORATION June 27, 1960 MAIN OFFIcE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT #9-60 SERVICE BULLETIN SUBJECI: Up-dating Aircraft Carbureters with Long-10k features to eliminate the time and expense of safetying. CARBURETERS AFFECIED: All Models A modernizing program study has been conducted at Marvel to incorporate new develop- ments and features to improve our product quality and service life. Out of this research for you, comes the use of Long-10k on certain parts to reduce the cost of servicing the carbureter. Long-10k is a patented procedure for inserting a several threads of screws and screwed in parts. washers, safety washers, cotter pins, and safety nylon strip in a slot cut across It will eliminate the need for lock wire. Most important we have started to use Long-10k on our float valve seat and float bracket screws which will eliminate the necessity of solder safetying this assembly in the casting. This has always been a problem. (Three cheers for the engineers.) Insofar as existing stocks of the parts affected in the field are concerned, use until depleted. Safety in the usual manner. An up-dating kit of Long-10k, bowl cover screws, float valve assemblies, float bracket screws, etc., will be issued so that you can up-date the units in your stock, or as the carbureters come to you for overhaul. SAFETY SCREWS WITH LONG LOK INSER T Long-10k parts may be removed and reassembled many times and still retain safety torque. Parts affected: j Bowl Cover Screws Float Bracket Screws Float Valve Seats Economizer Jets All Models All Models All MOdels Models MA-4-5 & 6 only MARVEL-SCHEBLER PRODUCIS DIVISION Service Sales M:!J ~~~~~~~~~~~~~~~__----------~l MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION TO: All Outlets MAIN OFFICE AND FACTORY DECATUR, ILLINOIS., U. S. A. AIRCRAFT 118-60 SERVICE BULLETIN June 29, 1960 SUBJECT: NEW Serial Numbering System for all Models of Aircraft Carbureters EFFECTIVE: AT ONCE In addition to part number and model number, all of our aircraft carbureters have a serial number on the name plate which is registered at the factory. Our past method of numbering carbureters consecutively regardless of model is unsatisfactory, and a new system is being put into effect immediately. The last number used in the previous series is 114027135. The new serial numbering system will be a three part number: such as; EXPLANATION: A I 7 I 100 & up The prefix letter indicates the carbureter· part number which also appears on the name plate. A prefix letter will be assigned to each part number we produce. The middle number indicates the latest engineering change number. The last number will run consecutively from 100 for the first unit produced of that given part number 100, 101, 102, etc. Each part number will start with 100 and number 100, 101, 102, etc. The following is a list of the letter prefix assignments part numbers. Additional letter assignments will follow "A" 10-3678-32 fiR" 10-3965-12 "B" 10-3346-1 111" 10-4025-11 ne" 10-3565-1 "]" 10-4115 "DI1 10-3634 "Kit 10-4164-1 "E" 10-3847 "L" 10-4171 "F" 10-3856-12 "M" 10-4191 "Gil 10-3878 to current production on service units: "Nil 10-4206 "on 10-4218 uP" '10-4233 "Q" 10-4252 uRn 10-4404 I1SI1 10-4439 When reporting a carbureter problem always list the complete number: such as, "H - 17 - 1072". We believe this new system will be helpful to all in maintaining better car- bureter control in the field. MARVEL-SCHEBLER PRODUCTS DIVISION MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY May 16 J 1960 DECATUR, ILLINOIS, U. S. A. AIRCRAFT CARBURETOR SERVICE BULLETIN #5-60 TO: ALL AIRCRAFT DISTRIBUTORS SUBJECT: PROPER FLOAT DROP ON ALL MODEL MA-4-5, MA-4-5AA AND MA-6 SERIES CARBUREIERS During the assembly operation of subject carbureters check to see that the float has the full drop. With the throttle body held in an upright position, the float should drop down to 2 1/4 to 2 5/16" measured from the gasket to the tip of the float as shown. If necessary to lower to proper dimension, file or grind off the support tang as illustrated. Recheck original float setting which should be 13/64". 2 1/4 to 2 5/16" '-'rtm.l) OFF AT THIS POINT TO LOWER FLOAT MARVEL-SCHEBLER PRODUCTS DIVISION ~~~w~Servic e Sales ""I.!!J;l.Ioi'" j ~""'.'~, 'i\ >..c,,_ \.~ '~\\_- MARVEL-SCHEELER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. AIRCRAFT SERVICE BULLETIN January 4, 1960 #3-60 Subject: Field Conversion of Model 1;!A-4-5, part #A10-4l64 into part #A10-4l64-l Improved performance can be obtained by field converting the A10-4l64 calibration into the A10-4l64-l, which is the current production cali- bration. This can be accomplished by any nA & En with standard shop tools using the following kit and instructions: CONVERSION KIT Part No. A666-6S0 to convert AIO-4164 into AIO-4164-1 I~ , < :/ I - , . . ,,., ~~ 6 'Ji:~~ I !'":~.~ I :- "01r_.-'I ~I. ~_~ ..- ~.~ ,- 1Er~.. it'j) V ID 2 3 4 5 KIT CONSISTS OF Part No. Part Name /. #9 Drill. 196 2. A194-S91 Pump Assy. I7 3. A34-S16 4. AIS-A84 S. A60-A127 Pump discharge valve assy. Pump discharge valve screw Bushing, Nozzle Vent 6. A16-A31 Bowl Gaslcet 7. A229-S89 Idle Tube (over) It is necessary to disassemble the carbureter and counterbore the nozzle vent channel as shown, for part A60-127 restriction bushing. Bushing A60-A137 IDI 7/16" CrOlla .ection view Bottom view of throttle body casting of nozzle vent channel Very carefully counterbore this channel to a depth of 7/16" using the 119 drill in the kit. Clean out all chips and foreign material after drill- ing. (Clean this channel by removing the economizer screw plug and blow out with compressed air with the throttle valve in a closed position.) Very carefully press in place bushing A60-A127 flush with casting face. Avoid any burrs which could change the restriction. Reassemble the carbureter using the new pump A194-591, pump discharge valve assembly A34-516, pump discharge valve retaining screw A15-A84 and idle tube A229-589. Stamp a dash one ( -1) after the AIO-4164 and the carbureter will be up- dated to the latest calibration. Kit A666-650 is available from your Marvel distributor at $9.70 each list. MARVEL-SCHEBLER PRODUCTS DIVISION j MA.RVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. Aircraft SERVICE BULLETIN #12-59 September 9, 1959 Subject: Installing and. setting float #A30-629 inMA-4-5 Series carbureters e We have been advised a little difficulty is being encountered during the install- ation and setting subject floats. We recommend the following procedure: It is necessary to bend the float levers to establish the required 13/64" setting between the float and gasket surface. THE TOP OF THE FLOAT MUST BE PARALLEL WITH THE GASKET. WHEN BENDING LEVER TO ADJUST HOLD SECURELY AT THIS POINT WITH NEEDLE NOSE PLIERS An excellent toe1 to. check float clearance can be made from a scrap bowl. Cut or mill off the bottom at a point of 2" from the top. Cut off about 1/2 of the pump cavity. Install two A15-A17 screws, one on each side, and cut off the heads. These will act as locating pins for the throttle body. With this "gage" clearance can be observed through the entire float travel, and when tilted from one side to the other as well. We use this procedure on our assembly lines, and recommend you use it too. If you don't have a bowl available for this purpose, we can ship you one prepared as above for $5.00 each net. j Mar~~~~~e~r~~p~r~o~dAu/Clt~-~~.ion rJ? T .J Mats ey Service Sales MARVEL-SCHEELER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY December 1, 1959 SUBJECT: Ref. II 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 DECATUR, ILLINOIS, U. S. A. 1111-59 SERVICE BULLETIN Aircraft Service Tools - Prices Tool II M-3 M-7 M-12 M-13 M-82 M-83 M-84 M-86 M-94 series M-95 M-96 M-98 (same as M-122) M-lOO M-lOl M-l02 M-102A M-l03 M-l04 M-l05 M-l05A M-l06 M-l07 M-I08 M-I09 M-120 M-12l M-122 M-123 M-123A Tool Name Nozzle Wrench (9/16") Nozzle Wrench (1/2") Socket Extension Socket Extension Handle Main Venturi Extracting Sleeve Primary Venturi Assembling Tool Main Venturi Assembly Tool Throttle Shaft Bushing Driver Air Metering Pin Gage Tool Throttle Shaft Bushing Reamer Throttle Shaft Bushing Driver Throttle Valve Bolt Peening Arbor Primary Venturi Assembling Tool Main Venturi Extractor Main Venturi Extractor Yoke Float Valve Seat Remover Float Valve Seat Remover Throttle Shaft Packing Tool Throttle Shaft Packing Tool Arbor Main Venturi Assembling Tool Throttle Valve Bolt Peening Tool Throttle Shaft Bushing Reamer Throttle Valve Bolt Clincher Main Venturi Extractor Main Venturi Assembling Tool Throttle Shaft Bushing Remover Pump Stem Packing Stake Punch Pump Stem Packing Stake Pilot Net Price $16.00 16.00 11.00 6.15 12.50 8.'50 9.50 7.00 24.90 14.50 9.00 10.50 8.00 24.00 9.50 18.50 18.50 9.25 6.00 9.00 6.75 14.50 19.00 9.00 6.75 11.00 23.00 8.00 ABOVE PRICES EFFECTIVE AS OF JULY 15, ,1963 PRICES NOT TO BE USED AFTER 120 DAYS WITHOUT WRITTEN CONFIRMATION FROM THE FACTORY. (Illustrations with reference numbers on reverse side.) Aircraft Carbureter Service Tools m ~ I I1 2 3 ~e i • n ~ ? ,0I I . 9 10 11 .~r I 17 18 ~-- ~ c: =:I .." I I 4 5 ; i 15 @ @I I 12 JlL 19 © I 24 I20 13 o 25 I I6 7 :n I 14 15 21 o I I 26 27 I 8 ~. IIb " 22 j 28 . MAR VEL - SHE B L E R PRO Due T.5 D I V I S ION MARVEL-SCHEELER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U. S. A. SERVICE BULLETIN. # 10-59 June 1, 1959 June, 1963 (Revised) TO: ALL DISTRIBUTORS MarvelliSchebler Aircraft Carbureters are now available for Ii Ii Continental ARl 6S, A-75, CWlgO, 0.200A NEW REPLACES CARBURETER CONTINENTAL BENDIX ENGINE PART NO. PART NO. PART NO. LIST PRICE A65 & A75 A10 -4233 627365 NAS-3B $ 121.55 C-90 AlO -4252 627367 NAS-3lA $ 123.75 0-200A AlO-4115 627143 - - - - - $ 120.45 These carbureters are listed in the new manual and are available at your regular discount. A B c ! MARVEL-SCHEBLER PRODUCTS DIVISION BORG-WARNER CORPORATION MAIN OFFICE AND FACTORY DECATUR, ILLINOIS, U, S, A, NO.8-59 June 1, 1959 SERVICE BULLETIN TO: ALL DISTRIBUTORS SUBJECT: Model MA 4-5AA AutoH_atic Altitude Bellows Ass 'y. CARBURETERS AFFECTED: Part No. -AIO-4025 &, AIO-4025-1 '. -, "" "" '.~''\. " A change has been made in the design of our Altitude Bellows As s e mbly which affec ts servicing subject carbureters. When it is neces sary to replace The old A293-524 assemblies in the above units - - use Kit Number A666- 640 which contains the foll.ow- ing parts: Syrn. A B C Part # A83-479 A24-A126 A29 _3:-542 Part Name Stud, Bellows Spring, Bellows Bellows Assy Assemble as illustrated, turning in the bellows firmly against the "0" ring. USING FINGERS ONLY --CAUTION-- DO NOT DISASSEMBLE OR ATTEMPT TO ADJUST. THIS UNIT CAN BE SET ONLY AT THE FACTORY. All other overhaul instructions pertaining to this model are unchanged. Always check the float setting (13/64"). Use new gaskets when servicing any carbureter. ->:<'t.- /;?~M~( ;~~ M~SSey Service Sales Ma er /