05 21v overheating

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Originally Posted by PBWolf

Not the impeller itself, but the entire pump can be put on upside down so that the inflow hose is now hooked up to the outflow. Only an issue if you actually took off the entire pump, not just opened it up to take out the impeller.

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His engine has a different style impeller pump.

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Originally Posted by leetudor

His engine has a different style impeller pump.

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Oops! Disregard my statement then..

do you have a water strainer?

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Originally Posted by docdrs

do you have a water strainer?

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Not sure to be honest


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Check all your intake hose clamps, you could be sucking air. Remove your thermostat housing and check for corrosion or other deposits and assess your tstat to start

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Originally Posted by torch

Not sure to be honest


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That's pretty critical to know if you are winterizing your own boat. Unless it was removed, you should have a strainer...and if you have never checked/drained/ or cleaned it, that very well may be the problem. If it froze over the winter, it could have cracked. Then, being on the suction side of the pump, the pump may only be pulling air. And, of course, you may have lucked out and it is just clogged.

Only strainer I am aware of is for ballast and the scoop strainer under the boat. But I'm no expert and may be missing something


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