I'm stumped. I have a 1989 Mercury 200 HP engine that is overheating while boat is underway (not so much when at idle). <br /><br />I have replaced the water pump and rebuilt the poppet valve. The timing is correct and the carburator is adjusted correctly. <br /><br />I have a large amount...
I'm stumped. I have a 1989 Mercury 200 HP engine that is overheating while boat is underway (not so much when at idle). <br /><br />I have replaced the water pump and rebuilt the poppet valve. The timing is correct and the carburator is adjusted correctly. <br /><br />I have a large amount...
