I like to winterize my boat when it is 25 degrees out, freezing rain with a good gale breeze. Last year it took a blizzard to get me to winterize my boat. Snowed about 29" the next day.
1. Wax Boat and polish all aluminum and chrome.
2. Change lower unit oil.
3. Buy spark plugs now so you have on hand to install after the first start
in the spring. Plugs will foul in spring when the remaining fogger is burned up on the first start.
4. Run freshwater through the engine for 10-15 minutes with rabbit ears.
5. Pull water seperator and fill with marvel mystery oil, screw back on.
6. Buy a water seperator for replacement after first Spring start.
7. Fill Gas Tank and add Stabil, Ezorb or enzymes
8. Fill oil tank if applicable-I have oil injection.
I fill both fuel and oil tanks to shrink the amount of space in the tanks to avoid condensation. I fill the gas tank with a higher octane too. Filling the tank vs leaving it low is a a subject of controversy.
8. Run the engine again. When you notice the difference in engine smoke
from the Marvel Mystery oil spray fogger into the carbs via the air filters
. I have 4 holes to stick the spray can hose on the cover to my carbs. Engine should stall out. I take off each spark plug and spray extra fogger into the cylinders after engine cools
. Do not replace spark plugs with new ones untill after the spring start (in driveway).
FYI. In the last few years, I always have one or two NGK Spark plugs that are bad so you may want to buy a few extra or use a different brand. Make sure to check the spark with a spark tester in the spring after replacing. It really sucks going to the water in the spring and finding out the hard way. The simple way to do this is to pull the plug wire while the engine is running and listen for a change in sound. If there is no change in rpm or sound, then you most likely have a bad plug. Switch the plug to another cylinder to see if problem migrates. If it doesn't migrate to the other cylinder, it isn't your plug, consult your manufactures repair book for the multitude of problems it could be.
8. Grease trailer bearings and spray wd40 or a rust inhibitor all over all trailer bolts, nuts, rollers, leafs. I clean the electrical connections for the trailer lights with a contact cleaner and then spray them down with white lithium greese.
9. I read a post above that said to tilt your motor up. I disagree, I spray the pistons with white lithium and I place my motor fully down so there cannot be any corrosion to the tilt pistons. I also do the same for the steering. I turn the wheel all the way to one side to hide the steering mechanism.
Also, grease fittings are located on your engine and steering pivot points and should be greased.
10. Take out batteries and charge fully. I never left mine on trickle in the boat. Store it indoors-NOT on cement floor.
By taking out your batteries it enables you to clean all your connections with a wire brush. Vaseline
all wire endings/connections. You will never corrode by doing this.
11. I spray down any mold within the holds with bleach then I place a few moisture catching buckets inside the enclosed holds.
I am sure there is more but thats all I can remember from the top of my head.
oh yeah, cover your boat!