This is an instruction manual for O.S. engines, which details the safety of O.S. engines, installation, maintenance and other contents
This manual provides operating instructions for the O.S. MAX-91HZ-R engine, which is designed specifically for 90 size helicopter models and integrates the O.S. fuel regulator system. The document details the engine's introduction, parts identification, and necessary tools for operation.
| Intended Use | Model helicopters |
|---|---|
| Fuel Type | Model engine fuel |
| Lubricant Requirement | At least 18% by volume |
| Nitromethane Content | 10% to 30% |
| Glow Plug Type | O.S. No.8 |
| Carburetor Type | 61E-R |
Never operate the engine in an enclosed space due to carbon monoxide exhaust, and do not touch rotating parts or the hot muffler.
Fuel containing 10% to 30% nitromethane and at least 18% lubricant by volume is recommended for best performance.
No, the engine was designed specifically for model helicopters and should not be used for any other purpose.
Installation requires hex drivers (1.5mm to 3mm), Phillips screwdrivers, socket drivers, and needle nose pliers.