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post #3 of Old 05-22-2010
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Join Date: Aug 2003
Location: Long Island, NY
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I went through something similar this year. I changed the raw water pump, had the heat exchanger boiled out, and changed the coolant. Put everything back together and test ran the engine, which worked great. Launched the boat and motored to my slip. After 5 minutes the temperature gauge was pegged. Got to my mooring and shut the engine down. Opened the bleed bolt on the thermostat housing and nothing but air. Bled and bled and bled. It took about 5 cycles of bleeding, running, venting, etc.

Once I got all the air out the engine runs right at 180 (I have a 180 thermostat), which is where I want it.

I bet you just need to get all the air out.


Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

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