how to winterize 525 hp
 

i know its early but how do winterize 525hps fresh water cooled?

Re: how to winterize 525 hp
 

Seems like you only need to drain the exhaust risers, outdrive, and raw water cooling lines to heat exchanger.

Re: how to winterize 525 hp
 

Its in the book.

Short version:

First, warm the engine up to operating temperature.
Remove the Fuel Filter, drain half of the fuel out, and fill it with Mercury 2-Stoke Oil. Re-install filter.
Hook up your muffs or your engine flush fitting to 5-6 gallons of antifreeze, and let it idle its way through the antifreeze, and shut it off.

DO NOT spray fogging oil down the throttle body.

You're done.

Re: how to winterize 525 hp
 

Make sure and use that enviromantaly safe anti freeze, the stuff made by sierra that way you don't have to worry about dumping it down the storm drain next year when you start it up for the first time in the driveway.

Re: how to winterize 525 hp
 

Gee Paul, you have small bocks in that old Sonic of yours, why would you care about 525's???? :D :D

Re: how to winterize 525 hp
 

hi chris you haven't noticed matter of fact theres two.im going to use your old saying.will work for fuel.thanks for the offer the other night but we are in florida.be sunday am

Re: how to winterize 525 hp
 

ripped it up in Gloucester and flew back doing about 95 (ok it was about 65) down the Annissquam to Black Cow down the st from you, over did it and slept in boat @ town dock. so much for the vacation. Hope all works out down there, let me know when the bots home - we can race and I'll let you beat me. :cool:

Re: how to winterize 525 hp
 

That's what I do. The only concern i have ever had if if the thermostat is hanging up and hence a portion of the engine is not flushed with anti-freeze.

I always wondered if I should pull the stats ...but never did.
It's a small but present risk I think.

Re: how to winterize 525 hp
 

Brian, couple questions - is this recommended for other than 525's (I have 454mags) and why no fogging oil? Is it because injected?
Thanks

Re: how to winterize 525 hp
 

this post is out of synch in relation to a closed cooling system such as the 525

Re: how to winterize 525 hp
 

mercury now recommends either shooting fogging oil directly into the cylinders or hooking an aux tank to the fuel line and using a concoction of fuel and oil they do not want the dry air pendulum to have oil in it