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post #1 of Old 12-15-2005 Thread Starter
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Yanmar 2GM20F


My Yanmar 2 cylinder diesel with 800 hours on it is vibrating excessively (1/2 - 3/4 inch on each side) on minimum rpm in neutral or engaged even when it is warm. Once I raise the rpm just alittle (say 200 rpm) vibration stops and it runs nicely without vibrationat all. Engine foundation have very good rubber cushioning on each anchor point.

Any suggestions whay is this happening?

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