On my 3HM with a Sendure heat exchanger, I drain the fresh water side by disconnecting the hose to the fresh water pump driven off a belt on the front of the motor. It is the lowest point in the circuit and does not require disconnecting or draining the exchanger. My pump goes through impellers like breath mints, so change the impeller while you are in there. When refilling, top off the exchanger at the fill, run the engine for a minute with the cap off. And then fill the exchanger again once the air has been bled off. Tighten the cap and you should be good to go. 50/50 water antifreeze... Chuck Gilchrest Half Magic 1983 35 Landfall Padanaram MA
Sent from my iPhone > On Jul 30, 2020, at 11:36 AM, Rick Rohwer via CnC-List > <cnc-list@cnc-list.com> wrote: > > I am seeing a drawing on www.heatexchandeshop.com > There is also a website. Www.sen-Dure.com. Hope it helps. > > Sent from my iPad > >> On Jul 30, 2020, at 06:06, Tortuga via CnC-List <cnc-list@cnc-list.com> >> wrote: >> >> >> Hi. Is there anyone out there who has a diagram, instructions, or other >> information about a Sen-Dure heat exchanger, model 2827? I have one mounted >> on my Yanmar 2QM15 engine. >> I'm eager to change the antifreeze in the unit, but where it is mounted, I >> have very little access to it. It's difficult even to see where the heat >> exchanger begins and ends. I would rather not detach it if I can avoid that. >> I'm sure there must be a drain somewhere that I can't see. >> I'd appreciate any guidance. >> Thanks >> Derek Kennedy >> SV Tortuga, 1979 C&C 30 mk1 >> Ballantyne's Cove, NS >> >> _______________________________________________ >> >> 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 >> > > _______________________________________________ > > 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 > _______________________________________________ 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
