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.