10 HP Runnig Hot

[gfennen]

I have a 1976 SeaKing 10 HP (Chrysler)
I put it on the back of my 12' inflatable boat and ran it yesterday. After a short while, it got VERY hot. The paint on the head discolored and bubbled.
Today, after it had cooled down, I put it in a barrel of water and to my surprise, it started. It seemed to be spraying plenty of water out with the exhaust on the back of the engine. I then removed the lower unit to inspect the water pump impeller. Everything looked fine. I can't figure out why it got so hot. I had recently rebuilt the carb, and replaced the plugs, points and condensers. Any ideas?

 

[pwilke]

Re: 10 HP Runnig Hot

Sounds like the water isn't getting in the right places. It could have blockage around the head where the water travels, possible calcium build up, etc.. You might have to pull the head cover off and clean all of the water passages. You will probably need a new gasket when you are through. Make sure your water tube has no leaks in it and is attached up into the motor correctly, water going up then down doesn't always mean that it is all getting into the right places. It could be going up and then down and then blowing out the exhaust. You could test the back pressure by taking the lower unit off, attaching a small hose to a garden hose, (fuel line works great) hook the small hose onto the water tube, turn the hose on, start the motor and see what happens. Good Luck