Keep and eye on ebay. You can find lots of used parts for the 3HM. A machinist will probably have ideas about how to get yours to seal. After exhausting professional options, I'd try employing JB Weld epoxy putty. You could manufacturer a flat plate to bolt or press in place of the end bell. Use mold release so the plate isn't permanent. By using the plate, you create a flat face against which the JB Weld will form. Use a dremel to clean up the details once it is cured. Repeat for the end bell. Now with 2 flat surfaces you shouldn't have trouble getting a seal.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Yanmar 3HM35F Solomons, MD Apr 10, 2024 08:36:04 jacob fuerst via CnC-List <cnc-list@cnc-list.com>: > Good day, > > In the process of doing some much needed engine upkeep on a 3HM35 and I found > the heat exchanger case has some corrosion around the front seal and may not > reseal or at least not for very long. There is quite a bit of additional > corrosion around the front of the same case. The local yanmar shop said they > looked for a replacement to no avail. Perhaps someone here knows of a lead? > > That said I’m not entirely opposed to dropping a new engine in because the > heat exchanger isn’t the only issue and I don’t even know the serial number > because the ID plate fell off before I became the owner and who knows the > total hours. > > My understanding is these boats were originally fitted with the 3QM30 but at > some point a 3HM35 with 2 bladed folding prop was installed in mine. My > question is if a 3YM30AE would be a sufficient replacement. The local shop > points out the higher rpm of the 3YM and believes it would be underpowered > compared to the current 3HM and is suggesting a 3JH40. > > I’m interested to hear any thoughts or experiences you might have. Thanks in > advance! > > Jacob Fuerst > 303-520-4669 > 1978 C&C 36 > Ventura, CA
Please show your appreciation for this list and the Photo Album site and help me pay the associated bills. Make a contribution at: https://www.paypal.me/stumurray Thanks for your help. Stu
