Model Engine Company of America


Sometimes rings get stuck from the engine just being stored for a long period of time. If you can get the engine running the ring will sometime free itself up just from the heat, movement, and lubrication from the fuel. If it does not start or resolve itself after 10 or 15 minutes of running the engine will have to be disassembled.

Remove the piston and gently try to move the ring. If you see a score on it CLICK HERE. It should be free in the entire groove. Pay special attention to a locating pin which may be present on some pistons. This is a little pin located in the ring groove.

If you have a stuck ring. DO NOT FORCE IT. The ring must be perfectly round and flat. Heating may help to loosen it. You can go up to 400 degrees F. in an oven or with a propane torch. Don't go hotter as it may start to change the structure of the aluminum.




The above information is provided as a guide. Since MECOA/K&B has no way of determining the ability of the individual using and understanding this information, we assume absolutely NO RESPONSIBILITY for any damage to person or property from the use of this information.