The yanmar engines have an engine block drain. Most of the coolant should come out by gravity. If you have a fresh water heater that is heated by the engine you may find it convenient to disconnect or tap one of the lines running to it. You have glycol coolant which "should" be captured and disposed of properly - Even the "eco" friendly propylene glycol.
Once the majority of the coolant is out I would flush it with a fresh water supply "garden hose". They also make flush chemical additive which I would use after the freshwater flush. Then flush again with clean. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Thu, Jul 19, 2018, 6:27 PM Tortuga via CnC-List <cnc-list@cnc-list.com> wrote: > I have a Yanmar 2QM15 with a Sen-Dure heat exchanger. I'd like to change > the coolant. Can I pump out the old? > > Thanks > > Derek Kennedy > SV Tortuga > C&C30 mk1, #553 > 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
