# TCDS E00008SE: Merlyn Products Inc

- Type: Type certificate data sheet
- Status: Current
- Holder: Merlyn Products Inc
- Revision: 0
- Revised: April 30, 2008
- Product: Engine
- Certification basis: Part 1, Part 33
- Data sheet PDF: https://openairdocs.org/files/sha256/4c/3b/4c3b9991146614b93eea32ff366f26866a8dc2d617ec2770f88f086b6809a946
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/87992BF772D408DB862574440054BBD7.0001
- Page: https://openairdocs.org/tcds/E00008SE

## Models (1)

As the data sheet lists them.

- IO-540-MX1

## What the data sheet says

From the PDF's text layer, line by line; tables lose their columns. The PDF is the record.

```text
Page No. 1 2 
Rev. No. 0 0 
 
DEPARTMENT OF TRANSPORTATION 
FEDERAL AVIATION ADMINISTRATION 
 
TC E00008SE  
   
Revision Original 
 
  Merlyn Products 
 IO-540-MX1 
Original Issue Date: 
April 30, 2008 
 
TYPE CERTIFICATE DATA SHEET E00008SE 
 
This data sheet, which is part of Type Certificate No. E00008SE, prescribes conditions and limitations under which the product 
for which the type certificate was issued meets the airworthiness requirements of the Federal Aviation Regulations. 
 
Type Certificate Holder: Merlyn Products Inc. 
   7500 West Park Drive 
   Spokane, WA  99224     
 
I – Engine Model    IO-540-MX1 
 
Type:     6HOA Direct Drive 
 
Rating: 
Takeoff and Maximum   250 @ 2425  
Continuous hp, rpm, 
Full throttle at  
Sea level pressure altitude 
 
Fuel 
(Minimum grade aviation  
Gasoline)     100/100LL 
 
Injection     Lycoming Type FM250 
 
Pump Drive    See Note 3 
 
Oil Lubrication   
Oil, SAE Number, Above 80 deg F  60 
               Above 60 deg F  50 
               30 deg F to 90 deg F  40 
                0 deg F to 70 deg F  20 
  Below 10 deg F  20 
Oil Sump Capacity, Quarts   12 
 
Ignition, dual  
Magneto drive 1.500:1 – clockwise viewed from propeller end      
Magnetos      (2) Unison Slick Aircraft Products 6363 (Left) 
         6360 (Right) 
Optional Magnetos     (2) TCM Bendix                  S6LN-1208 (Left) 
         S6LN-1209 (Right) 
Timing (deg BTDC)   20 
Spark Plugs    Champion RHB37E 
     Champion RHB32E 
     Champion RHB-36S 
     Champion RHB-32S

E00008SE 2 
 
 
Compression   
Bore and Stroke, in    5.125 x 4.375 
Displacement, cu. in.   541.5 
Compression Ratio    7.3:1 
Weight (dry), lb    479 lb 
         
    
C.G. Location     See Note 5 
Propeller Shaft – Specification  Type 2, Flange Modified 
A.S. 127 
Crankshaft dampers (torsional)  One fi fth order and one sixth order damper. 
 
Certification Basis: 
 
FAR 33, Effective June 10, 1964 including amendments through amendment 21 
 
NOTE 1.  Temperature Limits (Maximum permissible) 
 
 Cylinder head (well type thermocouple) 500 deg F 
                Oil Inlet 245 deg F 
                Air inlet to injector 400 deg F 
 
Note 2.  Pressure Limits  
 Fuel     45 psi max, -2 psi min at inlet to fuel pump. 
 Pressure at inlet to fuel injector 
   Maximum  45 psi 
   Minimum  18 psi 
   Minimum Idle  12 psi 
   Max Injector in  65 psi  
   Idle cutoff 
 
Note 3.  Accessory Drive Provisions: 
 
Maximum Torque 
(in-lb) 
 
Accessory Rotation Facing  
Drive Pad 
Speed Ratio to  
Crankshaft 
Continuous Static 
Maximum 
Overhung 
Moment 
(in-lb) 
Starter CC 16.556:1 N/A 450 150 
Alternator C 3.250:1 60 120 175 
Vacuum Pump CC 1.300:1 70 450 25 
Hydraulic Pump C 1.385:1 100 800 40 
Tachometer C 0.500:1 7 50 5 
Prop Governor C 0.947:1 125 2200 25 
Fuel Pump CC 1.000:1 25 450 25 
 
“C” Clockwise, “CC” Counter-Clockwise (viewed from anti-propeller end) 
 
NOTE 4,  Accessories and Equipment 
Starters, generators and alternators approved for use on this engine are listed in the latest revision to Merlyn Products 
Specification No. MX1 
 
NOTE 5.  The engine center of gravity is located 18.25 inches from the front face of the propeller mounting flange, and 0.88 
inches below and 0.16 inches to the right of the propeller center line.  
 
NOTE 6.  This engine incorporates provisions for absorbing propeller thrust in both tractor and pusher type installations. 
 
NOTE 7.  Refer to Merlyn Products document MX1-01A, Section 1.4.3.6 for applicable inspection procedures for engines which 
have been operated above the specified maximum continuous RPM rating  (except momentary overspeed as defined in this 
document). 
 
-END-.
```

## ADs (2, in force first)

- [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026
- [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023

## STCs approved under this data sheet (1)

- [STC SE01211SE](https://openairdocs.org/stc/SE01211SE): Installation of the Merlyn Products Inc. turbocharger system. Merlyn Products Inc.

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