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  1. Diesel
    I have a slight fuel leak in the top of my Yanmar 3JH4E near the injectors. This is a on a 2009 Catalina 375 with just under 900 hours. Trying to pinpoint the leak and resolve it. Could be the injectors, the return lines or hose clamps. Any other suggestions or ideas welcome. Has anyone had a...
  2. 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...
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