since changng my reverse rotation lower unit, I am having engine over heat problems. It appears that the lwer unit quits pumping water at 2800-3000 rpm, changed impleller at 27 hrs, engine runs 25-30 degrees hotter thanit idid with old mercruiser lower unit. Any suggestions?
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Inspect the water passage way for any obstructions. If the old impeller broke up you will need to find where the pieces went. Verify that your temp gauge is working properly. I would again inspect the impeller and all the water pump components ( housing, base and gaskets ) to make sure there is no problem.
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