'71 Johnson running hot at idle

97fordrunner

Seaman
Joined
Jul 10, 2014
Messages
71
Howdy folks. I finally got my motor running great. Pushes the ole 14 footer about 30mph on choppy water. I rebuilt both carbs and set carb timing. I.also rebuilt the water pump but now after idling in gear thru a no wake zone it gets very hot bit as soon as you run it wide open again it drops about 50-60 degrees and will maintain that. It's got.me confused and it seams backwards like it should be getting hot at full throttle. Any ideas? I know the pump is working cause you can see water coming out the relief. Any chance the water system has a clog or something?
 

Will Bark

Lieutenant
Joined
Aug 1, 2010
Messages
1,470
Could be that your thermostat is not operating correctly and needs replacing. What is the model # of your engine?
 
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