This document is an instruction manual for OS engines. It mainly includes safety instructions for operating the engine, engine construction, mixture control, glow plug start, etc.
The document serves as a comprehensive instruction booklet for the O.S. 55AX high-performance two-stroke engine designed for sport and aerobatic models. It emphasizes strict adherence to safety warnings regarding fuel toxicity, carbon monoxide exhaust, and propeller hazards before operation.
Key sections cover engine construction details, basic parts identification, pre-starting checks, installation of standard accessories like the glow plug and silencer, and specific procedures for starting with a glow plug or electric starter. The guide also includes instructions for running-in, idle adjustment, mixture control, troubleshooting failure to start, and care/maintenance routines.
| Engine Type | High performance two stroke engine |
|---|---|
| Fuel Requirement | Methanol based fuel containing not less than 18% castor oil or synthetic lubricant |
| Recommended Fuel Tank Capacity | Approximately 350cc |
Users must never operate the engine in an enclosed space due to deadly carbon-monoxide exhaust and should avoid touching hot parts like the muffler or cylinder head.
The engine should be operated on methanol-based fuel containing at least 18% castor oil or a synthetic lubricant, plus 5-20% nitromethane.
A fuel tank with a capacity of approximately 350cc is suggested for this engine.
A 12-Volt lead-acid battery is required when starting the engine.