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  1. Diesel
    I found my Yanmar 3GM30F, with only 120 hours, with a crankcase full of diesel mixed with oil, as in gushing out the dipstick hole. Many thanks to @marcjsmith for pointing me to my mechanical fuel lift pump as the likely culprit. A diaphragm failure will directly dump diesel into the crankcase...
  2. Diesel
    Hey friends - have a puzzle I'm trying to solve and would like some help......my engine starts up easily and runs great in neutral - smooth and quiet and will rev to 3,000 RPM easily; in reverse runs smooth and will rev to about 2,800 RPM; in forward, however, will only rev to a little under...
  3. Diesel
    the GM 30 in my Catalina 30 has always been hard to start. I thought I took care of the problem last year when I replaced the mixing elbow and removed the fuel injectors and had them repaired and re calibrated. One of them had a totally broken spring. It still takes around 30 seconds or so on...
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