O.S. engine FS-70 Ultimate

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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 2-4 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.

2-4

7-8



13-14

SAFETY INSTRUCTIONS AND

WARNINGS ABOUT YOUR O.S. ENGINE

INTRODUCTION, INSTALLING THE GLOWPLUG

INSTALLATION

FUEL TANK & LINES

EXHAUST HEADER PIPE AND SILENCER,

THROTTLE LINKAGE,

NEEDLE-VALVE EXTENSION

CARE OF FUEL PUMP AND REGULATOR,

PROPELLERS

GLOWPLUGS, FUEL

PROPELLER AND SPINNER ATTACHMENT,

TYPE 60U CARBURETOR

STARTING

CONTENTS

RUNNING-IN

IDLE MIXTURE ADJUSTMENT

CARE AND MAINTENANCE (laying up)

VALVE ADJUSTING

HOW TO SET THE CAMSHAFT TIMING

CARE AND MAINTENANCE

CARBURETOR EXPLODED VIEWS &

PARTS LIST

ENGINE EXPLODED VIEWS &

ENGINE PARTS LISTS

O.S. GENUINE PARTS & ACCESSORIES

ENGINE THREE VIEW DRAWINGS

MEMO

16-17

20-21

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Summary

Safety Instructions and Warnings

Critical Warnings

Covers critical safety risks, including propeller hazards, fuel toxicity, and burn risks.

Important Notes

Addresses less obvious dangers like hearing impairment, propeller safety, and general care.

Engine Introduction

Glow Plug Installation

Details on how to correctly install the glow plug into the engine.

Engine Installation and Mounting

Mounting Screw Fastening

Explains the correct method for securely tightening engine mounting screws.

Radial Motor Mount

Details on how to properly install a radial motor mount.

Fuel Tank and Lines Setup

Exhaust Header Pipe and Silencer Installation

Throttle Linkage Connection

Needle-Valve Extension

Glowplugs

Fuel Requirements and Safety