This manual introduces the safe operation methods of O.S. engine, including starting, running, adjustment, cleaning, maintenance, checking, troubleshooting, etc.
The document is an instruction manual for the O.S. MAX-21TM model engine, specifically designed to power Traxxas T-Maxx or Revo vehicles. It emphasizes safety regarding fuel handling, carbon monoxide exhaust, and hot engine parts before detailing operation procedures.
Key sections cover starting the engine with glowplug ignition (using LC3 plugs), running-in procedures, carburetor adjustments for mixture control, and troubleshooting common issues like poor idling or starting difficulties. The manual also includes exploded views of the engine and carburetor along with a list of genuine O.S. parts and accessories.
| Displacement | 3.41cc (0.208 cu.in.) |
|---|---|
| Bore | 17.0mm (0.669 in.) |
| Stroke | 15.0mm (0.590 in.) |
| Practical P.P.M. | 3,000-35,000 r.p.m. |
| Power output | 1.8 ps/ 29,000 r.p.m. |
| Weight | 243g (8.57 oz.) |
The O.S. LC3 glow plug is supplied with the engine and is recommended for improved power, fuel economy, and durability.
As a starting point, a fuel containing 20% nitromethane is recommended.
Remove the glowplug, close the needle-valve, and apply the starter to pump out surplus fuel.
A plug may need replacement if the filament surface is roughened/white, the coil is distorted, foreign matter has adhered, or starting qualities deteriorate.