BarryJ
New Member
Hello this is my first year winterizing my new 340 searay Sundancer 1999 with twin 7.4 L Bluewater in board engines using raw water cooling... And the question I have is this: do I need to start up the engines using fresh water and let them warm up so the thermostat opens before I add the anti freeze red pop? I plan on using the plunger under the boat method with a 5 gallon bucket to suck in the antifreeze red pop but I'm a little concerned if the thermostat is not open right away it won't get all the redpop hrough the engine block... would it be sufficient if I started right off with the red pop until it came out the exhaust? Or do I need to run fresh water for 5 minutes?