ZR450 Heater Winterization

[nautiqueobia]

Hello,

I have a 2015 Nautique G21 with a ZR450 (non coastal). I was reading this link winterizing as well as the pcm manual and owners manual for the 2015 G21. Is all I need to do to winterize the heater, is drain the heat exchanger both the fresh water drain as well as the water drain/zinc anode and spray 50psi worth of air around in there? Do I need to run antifreeze through any hoses to get to the heater or anything?

Additionally, should I remove all of the drain plugs on page 65 of the pcm manual figure 15-4 and leave them out all winter? All I did to the engine thus far was take off the intake hose by the batteries and run antifreeze through it and the ballast tanks. Is that sufficient?

Thanks in advance!

[nohlan_4]

Your heater has antifreeze running through it no need to worry about it. As far as winterizing the boat goes this is all I ever do and I live in Canada where the temps have gotten to -50C a couple times over my 7 years of ownership and never once had an issue and I store mine completely outside. Run boat on hose to operating temperature at idle for about 5 min. Disconnect hose and run roughly 25 litres of plumbers antifreeze through the cooling system by sucking out of 5 gallon pale. Then remove water pump impeller and set aside till spring. To make this easier I T into my fresh water pick up at the bottom of the boat with another valve and garden hose adapter. So much easier and faster then removing plugs.


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[nautiqueobia]

nohlan_4 so basically all you do is run engine for 5 min, run antifreeze through engine, then take out impeller?

[nohlan_4]

nohlan_4 so basically all you do is run engine for 5 min, run antifreeze through engine, then take out impeller?

5 min once it's already at operating temp to make sure the exhaust tstat is fully open. But other then that yes.


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[nautiqueobia]

Thanks