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  1. R

    mercruiser 5.00ltr efi manifolds and headers

    I was hoping that someone could help me, I have a 5ltr Mercruiser in a Searay Weekender, year 2000. I think I have water leaking headers, I am having lots of misfiring problems at low revs and the oil pressure was low. I have just changed the oil and changed the spark plugs. I am getting better...
  2. R

    Mercruiser5.0 ltr ECM Problems

    I wondered if any one can help me. I have a Mercuiser 5ltr EFI, year 2000, Serial number L694472. Basically the engine will not start. I have found that I have 12V to the + side of the ignition coil but - side is open circuit. I have traced this white wire to the ECM (I think the ECM is a...
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