This is my first gas engine, I brought this new with a spring starter already installed. Started for the first time today, it appears when winding backwards on the spring it
appears to be scrapping or rubbing against something, but this does not happen when being rotated forwards, engine starts and runs beautifully. Does anyone know what this
could be or what is causing it to scrape? I have installed this engine into a World Models 1/3 scale Piper J3 Cub and I have a 22/6 propellor, is this suitable for this engine and model?