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Yanmar 1GM10 Mysterious Death/Failure
Whilst motoring out of the river a couple of days ago, engine was running fine. Just as I reached the end of the river, revs dropped and a few seconds later the engine died. My first thought was fuel, so after anchoring out of the channel I took a look. Sure enough, there was a layer of water at the bottom of the fuel tank so there was no diesel getting to the engine. I have emptied this out, and attempted to flush the system through by bleeding from the on-engine filter. Fresh diesel now comes out the top of the on-engine filter, and out of the next bleed point (the end of the pipe leading from the filter to the fuel pump/throttle housing?). No fuel comes out of either side of the injector, no matter how much I pump the little fuel pump lever.
Would this indicate some sort of breakage/failure/blockage in the throttle/fuel supply housing?
Secondly, when cranking the engine there is no evident "puff" from the exhaust. If the engine isn't firing, would you still expect to feel some sort of output? Maybe a stuck valve?
When the engine is cranked, it doesn't sound quite right to me, but that could just be me. Scratching my head with this one!
UPDATE: For anyone who searches and has a similar problem, check the retaining nut on the valves as in my case it had come completely loose. Ensure it's tightened to the recommended torque as given in the workshop manual of 54Nm or so.
Last edited by lorddevereux; 11-30-2015 at 05:04 AM.