This document is an instruction manual for O.S. engines, focusing on safety operation, installation notes, starting and adjustment, maintenance, and troubleshooting.
This manual provides comprehensive instructions for the O.S. MAX-21RG-M and MAX-21RG-MX, which are high-performance water-cooled marine engines designed for small radio-controlled boats. It covers essential topics including safety warnings, basic engine parts identification, and detailed installation notes for the recoil starter, glowplug, carburetor, flywheel, and exhaust header pipe.
| Displacement | 3.46cc/0.211cu.in. |
|---|---|
| Bore | 16.6mm/0.654in. |
| Stroke | 16.0mm/0.630in. |
| Practical R.P.M. | 3,000 ~35,000r.p.m. |
| Power output | 1.7ps/28,000r.p.m. |
| Weight (MAX-21RG-M) | 317g/11.18oz. |
| Weight (MAX-21RG-MX) | 389g/13.72oz. |
It is a high-performance water-cooled marine engine designed for small radio-controlled boats.
No, the manufacturer does not recommend running the boat on the sea or in any other saltwater environment due to corrosion risks.
The standard accessory is Glow Plug No.8, though the O.S. No.8 glowplug may be employed irrespective of the nitro content of the fuel.