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Compass Marine How To | all galleries >> Welcome To >> Changing A Raw Water Pump Impeller > Removing The Screws
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Removing The Screws

Removing The Screws

As I said this job is very, very easy. If you can change oil or an air filter or clean a blender after making frozen "chick drinks" you can change an impeller.

Step 1: loosen the screws and remove them. If they are frozen or rusted use some PB Blaster but be VERY, VERY careful not to just spray it on! PB Blaster will eat pump seals, engine seals and engine gaskets for breakfast. If you need to use a penetrating oil I'd advise spraying it into the spray can cap and then dab it on the screws with a q-tip.

Tip: Buy yourself some spare face plate screws as one will always drop into the bilge, to never be seen again, and it will do it at the least opportune time. Murphy is always waiting for you...!

Nikon D200
1/60s f/4.0 at 24.0mm iso100 full exif

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Guest 23-May-2016 03:27
What about keeping the impeller flooded with antifreeze so that the entire impeller vanes stay supple durning the down months?? I have a 502 motor with a brass impeller housing there has to be a way to keep this impeller from being exchanged once a year, what do u think.