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1987 15 hp overheats

S

stumpjumper1121958

New member
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
 
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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.
 
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