
05-27-2011
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Junior Member
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Join Date: Jan 2009
Posts: 5
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I know his thread is a couple months old, but just in case - The water pump can be had really inexpensively from ASAP-SUPPLIES in the UK. As can a great many parts for the W30. Its the same engine as the BMC1.5. Westerbeke added on a few marinized parts of their own design like the exhaust manifold, but most parts and internals are the same.
The water pump changed over the years. I found the best way to tell was by the number of bolts on the cap along with the diameter of the impeller. You can also look in the manual and there should be a list of changes and dates - from that you can figure it out as well. My '81 used the 4 hole 70mm impeller. Go to asap-supplies and then do a search on BMC 1.5 Water Pump - Currently out of stock, but they can get it for you.
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