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Old 11-02-2008
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Westerbeke 20B Two Impeller change

I recently bought a boat with a Westerbeke 20B Two (18hp diesel) engine (1988).

I am in the process of winterizing it but am stumped at how to remove the impeller.

I have been unable to find any definitive info on how this is done for this engine, and I do not yet have the shop manual (on the way).

It seems, to get at the impeller, I have to remove the oil filter which makes no sense (can't imagine having to do this just to check the impeller).

Or, I have to remove the water pump...but in order to do that, I have to remove the oil filter!

Does anyone have experience with this engine? If so, any advice would be appreciated.

Also, assuming I can even get at the impeller once the cover is off, I am thinking of installing a Speedseal cover, as this would greatly facilitate impeller maintenance.

Thanks all for your help.
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