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Thread: 496 HO Mag Mercruiser - can ANYONE help?

  1. #1
    ParkerRiverRat
    ok, our 2003 Cat is having problems... it's been in he shop for 8 months now and they STILL can't figure out what's wrong with it. So, if ANYONE has ever heard of this problem and has any solution, please let me know.
    Here's the problem...
    I have a 2003, 496 HO Mag Mercruiser Engine. The Engine stalls when run for approximately 10 minutes. Restarts but continues to stall. When the engine Analyzer is plugged in to ECM, engine will not stall but the screen of the analyzer will go blank when engine would normally stall. The screen will restart wen engine is shut off and restarted.
    We've already paid $3500 because it was supposidly a head problem, but that wasn't it...
    Also, we got a new computer because the Mercruiser people told us that might be the problem... and that didn't fix it either.
    If anyone can think of anything, or knows someone we could call who knows the problem it would help greatly! We've got a trip planned every weekend in June, so we really need it fixed by then.
    We're taking the boat to a new shop next week, but after talking to them on the phone they're not sure what's wrong either...
    Everyone's telling us they've never heard of this problem, but we're hoping in an engine that's 3 years old someone else has had the problem and can let us know how they fixed it!
    Thanks!

  2. #2
    phebus
    Check my response in the Sandbar

  3. #3
    buzzaro
    Loose wire, short or corroded connection somewhere maybe?

  4. #4
    USCFAN
    You would think that a Mercury Tech would have heard of the problem and be able to help you. Where is merc when you need them? :cry:

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