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  1. M

    Location of ECM fuse/breaker for Cummins 480CE engines on 390 Motor Yacht

    Cummins manual indicates that there should be two power wires for each ECM on 480CE engines. Each wire is to have a 10 amp fuse/breaker. Have looked and I can not find these two fuses/breakers anywhere. Also checked the Owner's manual and I can not find any mention of where fuses/breakers...
  2. M

    Small amount of coolant under cummins 450

    After a day of boating, I find about 3 tablespoons of coolant in the tray under the starboard Cummins 450 engine. Happened last 4 times I took boat out. Tried to see where this comming from without success so far. Anyone know of likely places coolant would leak? My next step will be to line...
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    ECM wiring on a Sea Ray 390 Motor Yacht with Cummins 480CE engines (engine quits as if turned off)

    Does anyone know how ECM's are wired on a 2005 Sea Ray 390 Motor Yacht with Cummins 480CE engines (ECM is the engine computer)? Cummins wiring diagram shows ECM should have 2 unswitched positive wires with 10 amp fuses and 2 negative wires from battery. On my boat I know power for ECM...
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    390 Motor Yacht batteries

    Getting ready to replace my batteries in a 390 Motor Yacht with 480CE diesels. Trying to decide if I should switch from Interstate 31P-MHD (commercial heavy duty) to Interstate SRM-31 (marine deep cycle). Reason I am considering deep cycle is that I expect to be anchoring out a lot this year...
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    Weighing Seafire extinguisher

    I would like to verify that a Seafire FH500 fire extinguisher is still good in our 2005 390 Motor Yacht. Dial is in green so pressure is ok, but instructions say to weigh it to verify no halon has escaped. My problem is that I am not sure how to disconnect the manual release cable so that I...
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