Might that require the thermostat to be open before it will circulate the water?Just wondering,Bruce Whitmore 1994 C&C37/40+"Astralis"Sent from Samsung tablet. -------- Original message --------From: Morgan Ellis via CnC-List <cnc-list@cnc-list.com> Date: 4/11/19 9:11 AM (GMT-05:00) To: cnc-list@cnc-list.com Cc: Morgan Ellis <mje.mjel...@gmail.com> Subject: Re: Stus-List Universal engine coolant drain plug Hi David, do you have engine heated hot water on your boat? If so, you could disconnect those hoses. Run one to an empty 5 gal bucket and the other to one with fresh water. Run the engine until the fluid coming out is clear. You could do this a couple of time to flush the system then refill with DH2O and glycol. I haven't tried this, but it is likely what I would attempt.
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