Ringed engines require a generous break-in period where the motor is run very rich to provide lots of lubrication while the ring fits itself to the cylinder. They are also more easily damaged if the engine is run too lean. The piston and cylinder are matched at the factory to give a perfect fit and provide optimum compression. ABC engines start easily by hand, give more power than their ringed counterparts, have a good lifespan, and are less susceptible to damage with a lean run. No extended break-in is required for an ABC type engine.
Tips Keep the fuel that enters the carburettor clean with the use of a fuel filter.
Put a filter on the output of your fuel bottle when filling your model and another between the fuel tank and the carburettor in your model. If you are flying from an area that is dusty, we recommend an air filter for your carburettor intake to keep dirt from scoring the inside of your engine. Glow engines for cars come with air filters as standard equipment and are a must. When finished operating your engine for the day, run the engine dry of fuel by pulling off the fuel line before shutting it down for the last time. This will ensure that no raw fuel is sitting in the crankcase.