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Old 03-05-2021, 15:30   #1
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M3-20B raw water pump rebuild
Has anyone come across a rebuild procedure for a Westerbeke M3-20B water pump">raw water pump? Looks like i've blown a seal and engine oil is seeping in.
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Old 05-05-2021, 13:23   #2
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Re: M3-20B raw water pump rebuild
Here's the service manual. The raw water pump exploded view is on page 54 of the manual, which is actually page 60 of the PDF.

https://www.westerbeke.com/technical...hnical_man.pdf
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