Join Date: May 2007
Location: Glen Cove, NY
Thanked 68 Times in 63 Posts
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Re: Overheated my Yanmar 20gm20f
Sounds like you are fine. Will take more than a couple of minutes running hot to do any damage. Do keep an eye on the oil to see if it gets milky indicating water getting in like from a head gasket and/or warped head just to be sure.