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Re: yanmar 3gmf loss of power
Check where the throttle cable attaches to the engine. Maybe the throttle cable has streched or shifted and you are not really getting full throttle. Try pushing the engine mounted throttle lever to full throttle to see if it is at the end of its travel when remote lever is a full throttle.
You mentioned you just changed fuel filters. Maybe you have an air leak now. I would break and reseal the filter to be sure no air leaks and re-prime.
Bad fuel could give you problems, but I would not think it would suddenly appear- unless somthing is getting plugged (fuel pick up). BTW, when my fuel pick up was clogged, it led to engine stalling.
Last edited by casey1999; 09-05-2012 at 02:02 PM.