Winterizing a Mercury 4 stroke Outboard

[Dave Clifton]

So, I’m getting ready to buy a 16 ft. Tracker boat with a 40hp 4 stroke Mercury outboard and I’m a little shocked to find out how much Marinas charge to winterize the outboard motor. Do most of you winterize your outboards yourself and if so what steps are involved to get the job done without spending $300+. Thanks in advance for any suggestions!