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Where is the best source for the M25XPB heat exchanger gasket?

Sep 29, 2008
Catalina 310 #185 Quantico
West Marine has some Sierra ones, but not enough information on them; and they are 60 miles away in Annapolis.


Feb 14, 2017
Catalina 310 211 Lake Guntersville, AL
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Jul 1, 2009
Catalina 310 Sydney-Pittwater
Bought a long piece of the right thickness rubber and made them myself. Been doing it for almost 10 years with no problems. Very cheap.
Nov 18, 2010
Catalina 310 Hingham, MA
I've been getting mine from Mr. Cool (www.mrcool.us). Same place I got my replacement heat exchanger, zincs and upgrades brackets. They are a little thicker and softer than the ones I got from Hansen Marine. I like them better but they do get more surface memory than the Westerbeke ones.

Good luck and fair winds,

Sep 29, 2008
Catalina 310 #185 Quantico
The ones from Catalina Direct worked out very well. Thanks for all the tips.