O.S. Engines FS-40S-C & FS-40S-CX Owner's Instruction Manual

About this manual

This manual provides instructions for the O.S. Engines FS-40S-C and FS-40S-CX, which are overhead-valve four-stroke-cycle engines designed for 1:7 scale radio-controlled model cars. The FS-40S-CX model features a built-in recoil starter system, eliminating the need for a separate electric starter and battery.

What's inside

• Safety Instructions and Warnings
• Introduction and Basic Engine Parts
• Installation of the Carburetor
• Engine Installation
• Super Air Cleaner Type 102S
• Notes Concerning the Recoil Starter
• Starting, Running and Adjustment
• Care & Maintenance
• Parts Replacement
• Genuine Parts & Accessories

Frequently asked questions

What is the intended use of this engine?

This engine is intended for model cars and should not be used for any other purpose.

What type of screws are recommended for engine mounting?

The recommended screws for securing the engine are 3.5mm or 4-40 steel Allen hexagon socket type.

How should the starter cord be handled during starting?

Pull the operating handle straight out when starting the engine to prevent the cord from rubbing against the vehicle body or engine.