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Old 04-08-2017, 03:20 PM   #5
Edelweiss
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City: PNW
Country: USA
Vessel Model: 1976 Californian Tricabin LRC
Join Date: May 2011
Posts: 1,860
Is this the Sherwood pump? You used the gasket that came with the new impeller right and lubed the impeller when you put it in. And you're sure you got all the bits and pieces out of the system between the pump and heat exchanger.

It should pump a high volume of water right away. If all else is true, I would suspect you have wear inside the pump. The cam lobe and backing plate are replaceable and need to be replaced when there is wear or you will have suction issues getting the pump going.

They're easy to replace and you don't have to remove the pump and drive to do it.
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