Re: Winterizing a Merc 470
is the FWS already have anti freeze in it?? If so thats fine!!
What I use to do was fill a bucket with RV antifreeze, set it on the rear of the boat, Bucket must drain from bottom. a hole drilled and a 1" pvc glued in is fine. Clamp with Vise Grips or something?
Then start the motor with the muffs on the lower unit. when you start let the anti freeze flow and when you see it coming out the excaust you can shut her down, now you have anti in both spots and you good for the winter.
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1986 V20 
Old Fishermen never die, we just SMELL that way!!
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