Re: antifreeze or leave dry???
More of my .02 worth.<br />Warm the engine to operating temperature on the Muffs with the garden hose. Switch to the 60/40 antifreeze using the gravity or my sump pump preferred method. Run the Temperature back up to operating+ temp.<br /><br />Fog the engine dead, open all drains, drop the lower circulating pump hose. into each drain hole insert a pipe cleaner to help get any particle out. I remove the drain set from the manifolds to make sure the larger particles come out. I leave the drains open and the hose removed for a few days to let the moisture evaporate. The heated engine helped get a lot of the moisture out also.<br />remove sparkplugs, squirt in some fog oil.<br /><br />In a few days close up the drains, reinstall the hose, and be done. This assumes you have already changed the oil and filter on the engine and the OD.<br /><br />Also be sure to lower the OD to it's lowest point to relax the bellows and to drain off any mix. I tie wrap my through the hull exhaust closed. you might consider if your exhaust has large openings you might consider sealing them also. (Pesky varmits)<br /><br />From
http://www.vanagon.com/info/articles/coolants.html <br /><br />it's clear that coolants will ultimately breakdown or are continually breaking down and will contribute to corrosion. Dry Iron will corrode less.<br /><br />1969 Kaikheafer Mercrusier TypeII, 327 cu. in. 225HP all original minus a few wear parts. Dryblock winterized every year since it was new in out family. 34 years on a pair of LOG style manifolds is quite good.
