I fly a Baby Ace N30051 with a Continental A65-8 engine. This fall I had a problem with #2 piston having two soft compression rings. The oil ring seamed O.K. I have no mixture control. The piston and cylinder didn't look like they have over heated. Compared to a new ring. I would guess the bad rings were at least one half as stiff as a new ring. I have never heard of this problem. Any ideas on how this could happen?

Bernie F