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water inside cylinder yamaha 70 hp

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  • water inside cylinder yamaha 70 hp

    i rebuild a yamaha 70 hp engine and can not
    get rid of problem,
    water inside cylinder No' 1 the other cylinder are ok i replaced 2 new head gasket.
    and still have water on plug .
    where can i look for leakage other then head gasket ?
    Noam N

  • #2
    Check the cylinder head and the inner exhaust plate, they will get holes in them from corrision on the water passage side and corrode through into combustion chamber.
    Regards
    Boats.net
    Yamaha Outboard Parts

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