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Problem water pump Yanmar 2GM
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"Jeffrey P. Vasquez" wrote: I recently did a standard maintenance replacement of a raw water impeller on a Yanmar 2GM diesel. Everything seemed straightfoward, part for part, no leakage, everything went back together straight away and test runs at the dock were nominal. However, during a move to a new slip the engine alarm went off. A subsequent check revealed nothing. Try the impeller you took out -- it sounds like it was working before. Happened to us once. We got just enough flow for idle power. After that, I'd dismount the pump, leaving the input hose on, put the output into a bucket and power it with a drill. If you get good output, then it's downstream. We also found out that we have about 5 minutes' cruise power with no raw water flow: Takes that long for the fresh water loop to get hot. Probably takes longer if you have a domestic hot water tank in the loop. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
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