This manual introduces the operation, maintenance and maintenance of O.S. gasoline engine
This instruction manual covers the O.S. 120AX, a high-performance two-stroke engine designed for sport and scale model aircraft. It emphasizes strict adherence to safety warnings regarding fuel toxicity, carbon monoxide exhaust, and rotating propellers. The document details the use of methanol-based fuel with specific lubricant and nitromethane percentages.
| Engine Type | High performance two stroke engine |
|---|---|
| Design Purpose | Designed for sport and scale models |
| Crankcase Design | Aero-shape design |
| Recommended Fuel Base | Methanol based fuel |
| Minimum Lubricant Content | 18% volumetric castor oil |
| Recommended Nitromethane | 5-20% nitromethane |
| Recommended Fuel Tank Capacity | Approximately 350cc |
| Supplied Glowplug | O.S. No.8 |
The engine should be operated on a methanol based fuel containing not less than 18% castor oil or a top quality synthetic lubricant, plus 5-20% nitromethane.
No, this engine was designed specifically for model aircraft and should not be used for any other purpose.
Never touch or allow any object to contact the rotating propeller, and do not crouch over the engine when it is running to avoid serious injury.
A fuel tank of approximately 350cc capacity is suggested to allow around 10-12 minutes of flying time.