overheats at idle

Discussion in 'Propulsion' started by capslovak, Apr 24, 2006.

  1. capslovak
    Joined: Apr 2006
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Long Island NY

    capslovak New Member

    i have a 260 mercruiser that overheats at idle. once rpms turn up to about 1500 engine cools to normal operating temp. also runs cool at cruise speed

    water pump impeller in drive was changed, thermostat was changed. did not correct problem.

    engine runs cool when flush (muffs) are attached to a hose on land but overheats when splashed

    the motor has an aftermarket alpha I drive

    thoughts about where the trouble could be?

    thanks
     
    capslovak, Apr 24, 2006
    #1
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