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water temp rises and falls


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my water temp will sometimes rise to 200 and give it a little gas and it goes down. times you have to slow the boat down to cool the water temp wut do u guys think it is?

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Replace the impeller. I doubt your problem will exist after that. Check for debris in the strainer at the transmission cooler as well.

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I change the impeller every other year and carry a spair. A lot of guys do the impeller every year. For an '83 boat the tstat is not a bad idea either, just make sure you photograpy your way in to help get things together the correct way.

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