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O.S. engine max-65ax - User Manual

O.S. engine max-65ax
23 pages
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It is of vital importance, before attempting to operate
your engine, to read the general 'SAFETY
INSTRUCTIONS AND WARNINGS' section on
pages 2-6 of this booklet and to strictly adhere to the
advice contained therein.
Also, please study the entire contents of this
instruction manual, so as to familiarize yourself
with the controls and other features of the engine.
Keep these instructions in a safe place so that you
may readily refer to them whenever necessary.
It is suggested that any instructions supplied with
the aircraft, radio control equipment, etc., are
accessible for checking at the same time.
1
2-6
7-8
9
10
20-21
22
27-30
33
15-16
SAFETY INSTRUCTIONS AND WARNINGS
ABOUT YOUR O.S. ENGINE
ENGINE CONSTRUCTION,
NOTES WHEN APPLYING AN ELECTTRIC STARTER
ABOUT THE ENGINE
BASIC ENGINE PARTS
BEFORE STARTING
INSTALLATION
INSTALLATION OF THE STANDARD ACCESSORIES
FUEL TANK LOCATION
MIXTURE CONTROLS
GLOWPLUG
STARTING
CONTENTS
RUNNING -IN, IDLING ADJUSTMENT CHART
MIXTURE CONTROL VALVE ADJUSTMENT
REALIGNMENT OF MIXTURE CONTROL VALVE,
SUBSEQUENT STARTINGPROCEDURE
SUBSEQUENT READJUSTMENT,
CARBURETOR CLEANLINESS
TROUBLE SHOOTING WHEN THE
ENGINE FAILS TO START
CARE AND MAINTENANCE
ENGINE EXPLODED VIEWS & PARTS LIST
CARBURETOR EXPLODED VIEWS& PARTS LIST
O.S. GENUINE PARTS & ACCESSORIES
THREE VIEW DRAWING
31
32
34-35
36-37
38-39
40-41
11-14
17-19
23
42-43
44
24-26

Questions and Answers

  • J
    Janice WestAug 2, 2025
    What to do if O.S. engine fails to fire?
    • S
      Susan WilsonAug 2, 2025
      If the O.S. engine fails to fire, it might be due to a burned-out glowplug element. In this case, replace the glowplug. Also, check glowplug heating using other leads if there is something wrong with battery leads. If the engine is flooded due to excessive priming, close the needle-valve fully, remove the glowplug, and flip the propeller to pump out excess fuel.
  • S
    Sophia PhillipsAug 10, 2025
    Why O.S. engine has a sluggish rotation?
    • W
      William HallAug 10, 2025
      If the O.S. engine experiences sluggish rotation, the glowplug battery may be discharged. Recharge the electric starter battery, or recharge the lead-acid cell or replace the dry battery. Note that an unused or almost discharged dry battery may sometimes be of insufficient capacity if it is 'old stock'.
  • C
    Christopher BurnettAug 16, 2025
    What to do if fuel is not reaching the O.S. engine?
    • J
      Jessica PearsonAug 16, 2025
      If fuel is not reaching the O.S. engine, ensure the tank is filled. Check the fuel line for kinks or splits. Also, verify that the carburetor isn't clogged with dirt.
  • W
    William PetersonAug 25, 2025
    What to do if there is a mismatch of glow plug and fuel in O.S. engine?
    • J
      Juan SandersAug 26, 2025
      If there is a mismatch of glow plug and fuel in your O.S. engine, change either the fuel or the glowplug to ensure compatibility.

Summary

Safety Instructions and Warnings

Warnings

Covers events involving serious, potentially fatal injury from misuse or neglect.

Engine Construction and Basics

Notes When Applying an Electric Starter

Important notes regarding the correct and safe application of an electric starter.

Pre-Operation Preparation

Before Starting

Essential checks and preparations required before attempting to start the engine.

Installation and Accessories

How to Fasten the Mounting Screws

Detailed instructions on securely fastening mounting screws for engine bearers.

Fuel System and Controls

Mixture Controls

Explains the function and adjustment of the engine's mixture control systems.

Starting and Break-in Procedures

Starting

Step-by-step procedure for safely starting the engine using an electric starter.

Running-In (Breaking-in)

Essential procedure for breaking in the engine to ensure performance and longevity.

Optimum Needle Setting

Guidance on finding the optimal needle valve setting for engine performance.

Troubleshooting and Maintenance

Trouble Shooting When the Engine Fails to Start

Identifies common issues and provides corrective actions for starting problems.

O.S. engine max-65ax Specifications

General IconGeneral
BrandO.S. engine
Modelmax-65ax
CategoryEngine
LanguageEnglish

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