SERVICE INSTRUCTION M20-107
Mooney M20S Eagle · Maintenance Manual
Overview
This document is a service instruction from Mooney Aircraft Corporation specifically addressing engine setup procedures for the Mooney M20S Eagle and M20R Ovation2 models. Issued on July 12, 2001, it outlines necessary adjustments to the Teledyne Continental Motors (TCM) IO-550-G engine to ensure optimal performance. The instructions provided are crucial for maintaining compliance with updated engine setup values and are intended for use during the next scheduled maintenance action. The document emphasizes the importance of adhering to the specified adjustments to maintain engine efficiency and reliability.
- The document is specifically for the Mooney M20S Eagle and M20R Ovation2 models.
- Idle fuel pressure should be set at 9.0-11.0 psig after warming the engine.
- Idle speed should be stabilized at 700-740 RPM after warm-up.
- Full power fuel flow for the M20S should be 129 to 131 pph.
- Adjustments should be verified after initial setup to ensure compliance with specified limits.
Document
Source
Originally published by mooney.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Maintenance Manual
- Year
- 2001
- Pages
- 1
- File size
- 16 KB
- Publisher
- mooney.com
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- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
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In this document
Introduction
The introduction highlights the need for a re-evaluation of engine setup procedures by TCM, recommending a reset and verification of the low and high-end engine setup values as per the latest instructions.
Instructions
Detailed instructions for engine setup are provided, referencing Section 71-00-50 of the M20R and M20S Service and Maintenance Manuals. Key adjustments include idle fuel pressure, idle mixture, idle speed, and full power fuel flow.
Idle Fuel Pressure
Adjust the idle fuel pressure after warming the engine to maintain 700 RPM and set the idle unmetered fuel pressure at 9.0-11.0 psig.
Idle Mixture
The idle mixture should be adjusted to achieve a 40-60 RPM increase in engine speed when moved to idle cut-off.
Full Power Fuel Flow
For the M20S Eagle, the full power fuel flow should be adjusted to achieve 129 to 131 pph with a metered fuel pressure of 15.0 to 16.2 psig.
Safety notes
- Ensure all adjustments are performed after the engine has warmed up to avoid inaccurate readings.
Full document text
MOONEY AIRCRAFT CORPORATION M20 SERIES SERVICE INSTRUCTION M20-107 MOONEY AIRCRAFT CORPORATION Louis Schreiner Field, Kerrville, Texas 78028 tel: 830.896.6000 www.mooney.com Date: July 12, 2001 SUBJECT: TELEDYNE CONTINENTAL MOTORS (TCM) IO-550-G ENGINE SETUP PROCEDURES MODELS/ S/N AFFECTED: M20R, All S/N’s M20S, All S/N’s TIME OF COMPLIANCE: AT THE NEXT SCHEDULED MAINTENANCE ACTION INTRODUCTION: As a result of a re-evaluation of engine setup procedures by TCM, a re-setting and verification of the low and high-end engine setup is recommended in accordance with the following instructions. Please note the changes to the low and high-end setup values contained in the respective Service and Maintenance (S & M) Manuals and TCM's SID 97-3. INSTRUCTIONS: Perform engine setup in accordance with Section 71-00-50, Engine Set Up Procedure, of the M20R and M20S Service and Maintenance (S&M) Manuals, and TCM’s Service Information Directive (SID) 97-3 (3/24/97) with the following setup value changes: A. Idle Fuel Pressure – Adjust, after engine warm up, by maintaining 700 RPM (vice 650 RPM) and setting idle unmetered fuel pressure at 9.0-11.0 psig (vice 9.0 psig.) B. Idle Mixture – Adjust, after engine warm up, by stabilizing engine speed at 700 RPM (vice 650 RPM) and adjusting mixture to result in an engine speed increase of 40-60 RPM (vice 50+/-25 RPM), when mixture is moved to idle cut-off. C. Idle Speed – Adjust, after engine warm up, by reducing and stabilizing engine speed at 700-740 RPM (vice 750 RPM). D. Full Power / Full Rich Fuel Flow – Adjust, to achieve the following setup values: • M20R (Ovation2) – 136 to 138 pph (16.4 to 17.2 psig metered fuel pressure) • 20S (Eagle) – 129 to 131 pph (15.0 to 16.2 psig metered fuel pressure) E. Low Boost Pump – setup per specification should result in an indicated fuel flow of approximately 7.5 to 9.0 gph (engine off). Note: When full power fuel flow has been adjusted to the specified values, recheck the idle RPM unmetered fuel pressure and fuel / air mixture. If any values are not within specified limits, repeat the adjustment procedures. WARRANTY: Up to 2.0 hours labor, plus the cost of replacement parts (if needed), will be credited to the Mooney Service Center for compliance to the instructions contained in this Service Instruction, if the affected aircraft is still under warranty and warranty claim is received within 180 days of the date of this Service Instruction. Labor and/or replacement parts (if needed) will not be covered under Mooney Aircraft Corporation's warranty policy for affected aircraft that are beyond their respective warranty agreement. REFERENCE DATA: Teledyne Continental Motors Service Information Directive (SID) 97-3 (3/24/97) Mooney Aircraft M20R Service and Maintenance Manual #160 (revision 10/98) Mooney Aircraft M20S Service and Maintenance Manual #170 (11/98) PARTS LIST: None FIGURE/TABLE: None