I have a 25hp Mercury 2 stroke engine serial number OD191822. The prop that is currently installed needs to be replaced but local shops can't seem to cross the numbers on the prop. The number stamped on the outside housing of the prop is 1964OA4OP13. Inside the prop on the shaft housing is...
There is water leaking around what appears to be a gasket surrounding the top cylinder spark plug. Is this gasket for a water jacket? How difficult is the repair?