My new boat has water in the 3.0 cylinders

Discussion in 'Sterndrives' started by malfar, Jul 2, 2007.

  1. malfar
    Joined: Apr 2007
    Posts: 5
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Ottawa, On

    malfar Junior Member

    Just bought a 2000 Starcraft with 3.0 merc with about 50 hours on it. Ran fine but poor idle. Figured year old gas was problem. Changed gas but still the same. Pulled plugs - water on the back plug. Compression test has all 4 cylinders at 150. Back cylinder sprayed water out plug hole when spinning over, No water in oil. I figure possiblity is cracked block, head or exhaust manifold or head gasket. Any one of those more likely given the symptoms.

    Thanks Mal
  2. longliner45
    Joined: Dec 2005
    Posts: 1,629
    Likes: 73, Points: 0, Legacy Rep: 505
    Location: Ohio

    longliner45 Senior Member

    your gonna have to pull the head ,,,,,,,,maybe it is just a gasket,,good luck,longliner
  3. redtech
    Joined: Feb 2007
    Posts: 253
    Likes: 3, Points: 18, Legacy Rep: 27
    Location: suger pine, ca

    redtech Senior Member

    check the exhuast manifold fold a crack found this often with 3.0L's
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