proper way to store boat for winter

i am new to boating. i have 4.3 mercruiser and need to know what all i should do to winterize the boat.
thanks

Perform a search on "winterize". What year? FWC or RWC?

Ayuh,... Drain ALL the water from it, 'n put 'er to bed...
After the fluid change, 'n Service of course...

Good link here:
http://www.mercstuff.com/winterizing.htm

Read the above info in the link, and don't do the quick winterizing kit, it's not full proof. I know someone that did, and it cost them $2,500 the next spring to replace the engine. Make sure you get ALL the water out of the engine, especially up there in South Dakota! Pull each plug on both sides of the engine block, a fair amount of water should come out. If not, poke a small wire up there and make sure no dirt/sand is blocking the water from draining out. Drain the water out of each exhaust manifold, and also from the front water circulating pump.