Lost starboard engine

Discussion in 'Sport Cruisers' started by davidmcd, Sep 15, 2019.

  1. davidmcd

    davidmcd New Member

    Apr 23, 2017
    Lake Erie
    2003 Sundancer 300DA
    350 MAG w/Bravo 3 drives
    We were cruising across the lake and starboard engine lost power and will not restart it cranks but will not fire does anyone have a idea of possible place to start we have a 2003 Sundancer 300DA
  2. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    Wont be able to help with that limited information. Could be a lot of things. If you are mechanically inclined, give us some more symptoms and what you have checked out so far. If you are not knowledgeable about engines/repairs, you would be better off having a marine mechanic look at it and figure it out. With a 300 you are likely in a marina? In my experience, giving your marina mechanic business and building a good relationship with them is a good thing.
  3. Espos4

    Espos4 Well-Known Member

    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    Are you missing fuel or spark? That's where I would start.

    Some possibilities:

    Crank sensor
    Fuel pump
    Ignition coil
    Fuel pump relay (in the bank of 3 relays on top of the motor)
  4. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    I believe that engine combination has a fusible link in the engine mounted circuit. It is probably located down near the starter. If it fails, the engine will crank but will not start.

    A quick test is to engage the emergency start switch, which ties the 2 engine electrical systems together. If the starboard engine starts and runs, release the emergency switch and the engine should die.
  5. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Check the 3 fuses and the 50 amp breaker at the top of your engine 1st
  6. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    safety lanyard? Got an engine serial number
  7. Todd320

    Todd320 Well-Known Member GOLD Sponsor

    Jul 21, 2016
    St. Petersburg, FL
    2007 Sea Ray 320DA
    Twin V-drive 5.7L 350 Horizon
    This issue happened to me, and it was the fuel pump relay. For me, it was diagnosed by turning the key to the on position (don’t crank). and listen for the fuel pump to turn on. One engine you could clearly hear the pump, the other, nothing. The engine serial numbers and exact model of the engine will be extremely helpful.

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