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post #17 of Old 12-20-2012
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Re: Full throttle needed to start Yanmar 2GM20F

Originally Posted by 73Morgan View Post

I agree about the injectors. The way I understand it the injectors are the only thing that could be allowing too much fuel to get in the engine and cause fuel knock. If the Injection pup was failing that would result in not enough fuel. Are my assumptions right?
That's been my experience.

On our last rebuild I ordered a full set of 'reconditioned' injectors. During the break-in period we got some fuel knock that scared the H out of me because it sounded like metal-to-metal contact.. gladly discovered eventually that one of the 'new' injectors was breaking over at under 500 psi = wet fuel = serious knock. Replaced injector and off to the races.


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