Impeller Housing Merc. brass seawater pump: Replacement needed?

[chriscor]

Hello!

Just coming back from disassembling my Merc. brass seawater pump (Part-No.: 862914) sitting on a 4.3 L MPI from 2005. While the impeller itself is in perfect condition the impeller housing plate is showing some concentric grooves (pic. enclosed).

Would you recommend a replacement?

Thank you
Christian

 

[water world]

Re: Impeller Housing Merc. brass seawater pump: Replacement needed?

Yes change impeller also.

 

[Pete104]

Re: Impeller Housing Merc. brass seawater pump: Replacement needed?

How does the housing itself look? If anything like the cover, replace the whole pump.

 

[chriscor]

Re: Impeller Housing Merc. brass seawater pump: Replacement needed?

Well, the housing itself looks fairly good (see pic). No mechanical damages. Same to the impeller!?

Maybe, just changing the housing?

Thx
Christian

 

[Pete104]

Re: Impeller Housing Merc. brass seawater pump: Replacement needed?

It may be OK this time. Hard to see without 3-D. The grooves don't look as deep as in the cover.

 

[scoflaw]

Re: Impeller Housing Merc. brass seawater pump: Replacement needed?

Mine looked the same with 200 hours on it. Took it down to the local machine shop, put it on his belt sander for a few seconds, looked almost like new when I left.

 

[chriscor]

Thank you - will try the belt sander first.

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[chriscor]

Re: Impeller Housing Merc. brass seawater pump: Replacement needed?

Just want to report back: Brought the housing to a local grinding shop (pic. enclosed). They put it on a precision grinding machine taking away all the groves and a nice flat surface is back. Of course, a few milimeters are gone but, housing will run one or two more seasons prior a replacement is needed. I paid 50 Euros which is around 65 US $ and 150 US $ less of the replacement part.