Welcome! Need support, you got it. Or share you ideas and experiences.
with my 6.5 Johnson motor. First we checked the water pump, it was ok.. Then we checked the cooling lines, they were ok., so we decided to open the motor. The motor's gasket is bad, water was leaking into one of the piston chambers. That is why the motor was over heating and that is where all that vapor was coming from.I believe I can fix it with "Form A gasket sealent".
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