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Cannot remove water pump cartridge b94 Merc 5hp

B

Bob P

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"I am trying to replace the im

"I am trying to replace the impeller on my Mercury 5hp outboard made in 1994. The water pump impeller on this engine sits inside a metal, cup-shaped "cartridge". The problem is, I cannot remove the metal cup to replace it. The cup is deeply scored around the opening for the driveshaft and so must be replaced. I have tried tugging on it at the one spot I can grab with needlenose pliers, but it will not budge. I have been dousing it with Liquid Wrench, but still it won't move. The black water pump housing which the cartridge sits in appears to be a hard plastic similar to bakelite.

Can anyone recommend a method on how to dislodge it?"
 
Bob.
I'm not sure just wh


Bob.
I'm not sure just what you have but the pump housing needs to be removed to get the impeller out.
Remove all bolts / nuts holding the pump housing in place and remove the housing.
 
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