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Old 09-09-2010, 20:46   #1
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Yanmar 2GM20 Vibrating . . .

My Yanmar 2GM20F is vibrating above 1800rpm. My guess is that I should have a look at the motor mounts but I don'y know how much they vibrate anyway.
I realise that 2 cylinder diesel motors have to vibrate a bit but mine feels a bit much.
Any other suggestions out there on where to look???
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Old 10-09-2010, 05:02   #2
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Definitely check your motor mounts, your prop shaft is likely out of alignment. Also check that your prop isn't fouled.
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Old 10-09-2010, 06:00   #3
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Get you eye as close as possible, thoroughly clean off each mount and have someone move the engine side to side as far as possible. A broken mount will be clearly visible, and a partial crack will squirt bilge juice. You might look at a similar engine that doesn't vibrate [as much] first.
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