This manual provides instructions for operating the O.S. engine, including safety issues, engine construction, installation and adjustment, and maintenance.
This manual provides comprehensive instructions for the O.S. MAX-55AX-BE internal combustion engine, which is designed exclusively for O.S. Bio-Ethanol fuel. It includes critical safety warnings regarding propeller hazards, carbon monoxide exhaust, and fuel flammability. The document details engine construction, basic parts identification, and specific notes on applying an electric starter to prevent hydraulic lock.
| Fuel Type | O.S. Bio-Ethanol fuel only |
|---|---|
| Intended Use | Model aircraft |
| Propeller Tip Speed Limit | 600 feet (180 metres) per second |
The engine is designed to use O.S. Bio-Ethanol fuel only and is not compatible with conventional methanol-based glow fuel.
Yes, a spinner assembly is desirable for centering the starter sleeve, but it must be a precision-made product that does not cut into the propeller blade roots.
Do not over-prime the engine, as this can cause a hydraulic lock and damage the engine. If over-primed, remove the glowplug and pump out surplus fuel.