1961 Johnson Sea Horse 75hp V4SL-13 Still overheating

Clippership821

Petty Officer 2nd Class
Joined
Jun 26, 2007
Messages
103
Just finished putting in a whole new pump kit and motor is still overheating. Any ideas? It seemed to be pumping fine when I tested it on the trailer. I adjusted the slow speed idle. It was running fine and the water was spitting out the back. It's getting smokin' hot on the port side. At full throttle though the water is pouring out the back but still getting hot. It started knocking so I shut her down quick and got pulled back to the launch. Thanks in advance for your responses.. It cooled down pretty quick and started up but overheated like before.
 
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