Many C&C yachts with Yanmar 3GM and 3HM diesels we’re actually fitted with raw water cooled engines, outfitted at the C&C factory with a Fresh Water conversion kit made by Sendure. This was a cost savings for C&C. Those systems use the Yanmar belt driven water pump as a fresh water pump mounted low on the engine and have an added Jabsco belt drive pump for raw water system mounted higher up. Both use rubber impellers (not great). Factory Yanmar 3GMF and 3HMF use metal impellers on the circulation side and the pump mounts up at the thermostat. The rubber impellers are not ideal as a circulation pump as the coolant temperatures are significantly higher than experienced on the raw water side. I’ve also experienced bearing failures with the Yanmar pump which costs upwards of $600. Chuck Gilchrest Half Magic 1983 Landfall 35 Yanmar 3HM
> On Aug 3, 2020, at 10:54 AM, ALAN BERGEN via CnC-List <cnc-list@cnc-list.com> > wrote: > > > Mazen: I don't think you have a 3gm. Jon's pictures of a 3qm are more likely > what you have. > > Alan > > > >> On Mon, Aug 3, 2020 at 6:29 AM JP Mail via CnC-List <cnc-list@cnc-list.com> >> wrote: >> Upper is coolant pump. Lower is raw water pump. >> Go here for a pic: >> https://psyberspace.com.au/yanmar/anatomy.htm >> Jon >> 35-3 >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- >> https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!5GNaFYai5HjvmBs6CvRLww2EF4nl6Fqx0hEMhbaI2LCZGvRjoCGO1YnZD3qMlJb1pec$ >> >> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
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