Stus-List Re: 36-1 Repower or 3HM35 heat exchanger?
Jacob, Like Josh suggested, a good machine shop can probably help. Failing that, I'd take the exchanger to a good radiator shop. I had corrosion and leakage on the sealing surface of a side plate of the Atomic 4 that was in Touche' when I bought it. Repaired it with JB Weld and a flat file. Sealed up great and didn't leak for years until I repowered it. Is this it? https://www.dam-marine.com/gb/home/32570-yanmar-3hm35-cooling-fresh-water-cooler-75b8dbdd.html BTW, there's a complete 3HM35F on eBay for $5000. -- Dennis C. Touche' 35-1 #83 Mandeville, LA On Wed, Apr 10, 2024 at 7:35 AM jacob fuerst via CnC-List < cnc-list@cnc-list.com> wrote: > 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 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
Stus-List Re: 36-1 Repower or 3HM35 heat exchanger?
Hi Jacob To second what Josh said. I repaired a SB8 Yanmar cooling system with JB weld 6 or 7 years ago. It is still holding with no leaks. Douglas Mountjoy 1988 C LF 39 Mexico at large 1984 Sabre 34 Port Orchard, WA On Wed, Apr 10, 2024, 05:35 jacob fuerst via CnC-List wrote: > 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 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 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
Stus-List Re: 36-1 Repower or 3HM35 heat exchanger?
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 37+ Yanmar 3HM35F Solomons, MD Apr 10, 2024 08:36:04 jacob fuerst via CnC-List : > 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 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
