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post #5 of Old 04-05-2014
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Re: Impeller replacement Merc 5hp

Originally Posted by jballou View Post
Great! Thanks. Anything else that could be preventing water flow through the pump that I should check out?
No experience with your motor. On mine the thermostat could get plugged up, but there was a small by-pass hole in the housing, allowing a small bit of water to pass, maybe not enough to flow out the pee hole. Checking the thermostat might be easier than changing the impeller. Or, if the motor is not overheating, the pee hole may be plugged? Pulling the head to check for plugged water passages may also be easier than changing the impeller.

I have changed a few impellers and found that getting the water feed tube back into the power head was challenging. Finally figured out that tipping the motor upside down made it a lot easier to see what I was doing.

Paul T
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