RE: os max 25 part #s and rebuild info
We'd like to help you, but you did not identify which particular O.S. Max .25-size engine you have. They have made many different .25-size engines over the years, and we need to know which one you have before we can see how we can help you. Any identifying markings can help. Please give us as complete a description of the engine as possible. The numbers on the rear cover don't identify the particular engine.