boat overheating

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   I have a 85 ski nautique 351/C. My boat started overheating one day. got to 200. we then ripped out the termistat and did not put a new one in. it still overheats. Then we bought a new water pump and impeller. I think I put it in ok and not upside down.I checked all hoses for air leaking all good. still overheating. any help

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kilowake66 Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote kilowake66 Thanks(0) Quote Reply Topic: boat overheating Posted: December-12-2004 at 8:09am
	I have a 85 ski nautique 351/C. My boat started overheating one day. got to 200. we then ripped out the termistat and did not put a new one in. it still overheats. Then we bought a new water pump and impeller. I think I put it in ok and not upside down.I checked all hoses for air leaking all good. still overheating. any help

jameski Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: May-18-2004 Location: United States Status: Offline Points: 368	Post Options Post Reply Quote jameski Report Post Thanks(0) Quote Reply Posted: December-12-2004 at 10:50am
	Your transmission fluid cooler might be stopped up - preventing water from making it to your raw water pump. Take the raw water hoses off and shine a light through it to check. You will probably have to remove the cooler mounting bracket, but you should not have to remove the transmission fluid lines. Also - if you have ever had an impeller loose a fin, then you might have a fin lodged in your cooling passages blocking flow to your engine.
	current boat 94 Sport Nautique previous boat 78 Martinique

Tim D Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-23-2004 Location: United States Status: Offline Points: 2641	Post Options Post Reply Quote Tim D Report Post Thanks(0) Quote Reply Posted: December-14-2004 at 4:29pm
	Is it running hot without a thermostat?
	Tim D

mrese Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: February-18-2004 Location: Al Status: Offline Points: 93	Post Options Post Reply Quote mrese Report Post Thanks(0) Quote Reply Posted: December-14-2004 at 5:40pm
	Did it start to "overheat" while the boat was idling or while running at forward speed. It is somewhat normal for the engine to "heat soak". That is after running for a bit, then shutting down the engine and then cranking it back up, it will read high (ie 200) Once you start circulating water, it should come back down to normal op temps. Otherwise, you can start trouble shooting useing the FAQ list at SKIDIM. See the link at the top of this page. Also check to see if the gauge is reading correct by measuring the water temp or block temp by alternate means.

boat overheating

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