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    • Cummins Marine Forum Topics
    • Cummins Onan Generator MDL3 fuel shut off solenoid?

      This topic has 2 replies, has 2 voices, and was last updated byKevin Wood 2 years ago

      July 7, 2021 at 10:11 am Shot in the dark – thanks in advance. I’m not a mechanic. model 12 5 MDL3A 31150A, serial A890 200 886 Symptoms – Will not shut down: stop switch / emergency switch, remote panel. Fuel must be cut in ER. Data – Generator runs properly. Oil, temp & voltage OK. AC voltage OK in all load conditions. There is minor RPM hunting when larger loads [heat pump/AC] are imposed. Throttle lever can be moved 1-2mm between har…

      Started by: Kevin Wood in: All Other Marine Diesels


      2 Replies
      July 11, 2021 at 6:18 pm 1989 freshwater. 1500 hours. Otherwise working perfectly. Injector pump is Stanadyne model DB2-4323, RPM 1800, serial # 6282566, Nameplate part # 147-0101-03 but OEM parts manual shows 147-0461-03. Since my original post the gen will now shut down w/ Stop switch. Perhaps exercising the solenoid as I noted above freed up some gunk. It *looks* like the top part of the pump is field serviceable [but I’m no mechanic] without removing the pu…

      Last Post by: Kevin Wood posted: 2 years ago

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