Can any one comment on what transmission ration & prop size they used when re-powering their J/30 with a Yanmar 2YM? It has a different bell housing bolt pattern from the old engine.

On my 2GM I have a forward ratio of 2.62 and have stock 14" Martec propeller

Last edited by Rob Van Name; 09/11/20 11:17 AM. Reason: added ratio, prop size