Quote:
Originally Posted by stuffinbox
I'm also surprised that they change the oil as part of the winterizing. I think I read somewhere that you're better off changing oil in the spring. Some condensation may collect during layup periods and so if you change oil after the layup, you will also pump out the water with the oil.
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Oil is changed in the fall so that the acids that form from as a result combustion don't sit there etching and damaging the innards of the engine all winter long.
As for condensation forming inside the engine that usually only happens during a cold start or if you don't seal off the intake and exhaust manifolds. If you don't feel like sealing off the exhaust manifold at least drain the water lift muffler so that the antifreeze is not evaporating and condensing inside the exhaust valve side of the engine.
Visual condensation on the exterior of an engine block is normally caused by a boat stored with a wet bilge and what happens on the out side is not necessarily what happens on the inside of the engine. Always store your boat with a dry bilge and things will be much fresher in the spring. Solar vents help too unless your cover is too dark for them to work..
Quote:
Originally Posted by Pamlicotraveler
Maine Sail (still Halekai in my mind) 
Why do you need to remove the impeller if you've pumped anitfreeze through? |
Because anti-freeze is bad for many impeller compounds and can shorten the life span. I replace my Impeller yearly anyway and use the one I took out as a spare for the next season. I'd rather not have my spare exposed to a winters worth of antifreeze.