yanmar 3gm

Hey, I have a Yanmar 3gm in my Hughes 36. At idle, I can rev the engine right up to 3000rpm with no abnormal vibration. The same can be said for when the boat is in reverse. However, when I shift into forward I can only get up to around 1100rpm before I notice significant vibration and engine...

I recently read a article in Sail magazine about tools you should have on a boat and it noted that the product Kopr Shield is a "conductive grease for battery connections and to seal engine zincs." I have a Yanmar 3GMD on my boat and it is a raw water cooled engine that has two plugs in the...

Does anyone know if a Yanmar 3GM30 will fit in a 1981 Hunter 30 as a replacement for the 2GM? Any problems I would need to know about? I have a chance to buy a low hour 3GM30 and am considering it. Thanks, Will

I recently bought a 1995 Hunter Legend 35.5 and on two occasions have experienced air in the fuel lines causing the engine to stall and not restart both times. I've done a lot of troubleshooting and research but before I settle on my final solution I'd like to get a few thoughts from this...