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  1. #1

    Unhappy 1987 15 hp overheats

    I have changed the thermostat and cleaned the pee hole motor still over heats and shuts done after a few minutes of running at full throttle , while will idle for hours. Changed impeller is a two stoke motor
    Last edited by stumpjumper1121958; 08-27-2017 at 02:32 PM. Reason: additions

  2. #2

    Default Re: 1987 15 hp overheats

    Considering the engines age, there is good chance the cooling system has corrosion that is blocking the necessary passages needed for cooling the engine. Pull the head covers off and look at the condition of these passages. When you replaced the thermostat, what did the old stat look like? Because if it was in bad condition, such as corroded, that is a good indicator of how the cooling system looks.

  3. #3
    Join Date
    Aug 2017
    South Africa

    Default Re: 1987 15 hp overheats

    When last did you change the actual impellar?

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