Do you mean a 55 or 56 hp?
Tony,I have a feeling you are refering to the 56 hp Yanmar, 4JH3B series of motors. Ours is approaching 600 hours after a little over 3 years. My view is to always go with our local Yanmar dealer to do engine work. Too much is involved, and the confidence you get from going with authorized dealers is important. In Southern California, we use Boatswain's Locker. I'm sure you have someone similar on your end.John Richards/v Jack's Place