Join Date: Dec 2012
Location: Vancouver BC
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Re: Yanmar 2gm2f no start after fueling
A simple check is to use the primer pump to bleed the fuel from the tank to the filter head. Then use the primer to bleed the fuel to the injection pump. You will have ensured that fuel travels freely to your injection pump. That's good. Next, holding the injector bodies with a wrench, loosen the injector pipes one turn. With the seacock turned off have someone crank the engine until fuel begins to surge and run down the injectors, then, holding the injector, retighten the pipe. Open the seacock and the engine should start now. That doesn't mean it will though. If it's injecting water from the fuel system then it will run and die, so ensure, hopefully at a Racor filter or some such thing, that what you are feeding the engine is in fact clean diesel.
Some other things to note...
1.. make note of the oil and coolant level before you go on. If either rise or drop while you are figuring out your problem, the solution might be revealed by those changes.
2.. the amount of water exiting the boat through the exhaust while running could reveal plugged exhaust/water backing into cylinders.
I have confidence in you. You can do it!