Join Date: Feb 2008
Location: N. VA
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No, I do not think that is normal. I have Yanmar 2GMF and it doesn't do that. The transmission oil advice is good advice (and you should check it so you know the level) but probably is not the problem. It sounds to me like the clutch is not fully disengaging. I suspect the transmission cable needs to be adjusted. You can tell easily sitting at the dock with the engine off. With the transmission in neutral you should be able to turn the shaft by hand without much effort.
A cable adjustment is easy. Take a look at section 9-7, Remote control cable adjustment, in your engine manual to see how the shifting mechanism works. If you don't have a Yanmar engine manual and your engine happens to be a 1GM, 1GMF, 2GM, 2GMF, 3GMD, or 3HF, you can download this one
. Or, you can talk to a mechanic at your marina and have him do it.
Let us know how you get on with it! If you have questions, we'll help if we can.
T. P. Donnelly
S/V Tranquility Base
1984 Islander 30 Bahama
Last edited by dacap06; 07-14-2012 at 03:00 PM.