2. Flush the cooling system. Also remove block plugs and drain all water. This removes sediment and rust flakes. Pump in anti-freeze to avoid trapped ice pockets. Use non-toxic stuff.
3. Fog the engine with oil to prevent rust. Make sure to spray some oil into the cylinders through the spark plug holes once the engine is cool. Good time to check spark-plugs also.
4. Replace oil and oil filter.
5. Change the lower unit gear case. Even a little water trapped in the gear case can cause damage.
6. Check props for nicks even slight damage can hinder performance. Worse yet blade damage can cause vibrationl damaging other engine parts.
7. Store outboards in up-right position. Consider having water pump impeller replaced every two or three years. The rubber will get stiff and break off.
8. Spray a moisture displacing lubricant onto electrical terminals and fuse panel. Read label and make sure it's safe for electrical components.
9. Inspect steering systems. Tighten if loose.
10. Clean the backfire flame arrester with carborator cleaner.
11. Clean boat inside and out and cover when stored even indoors, Allow air circulation to prevent mildew.
12. Drain water from the bilges and leave the transom drain plug out.
13. Hang life jackets up to air out.
14. Examine trailer tires and grease the wheel bearings, Check bulbs and electrical contacts on the plugs as well as sockets. Spray contacts with a moisture displacing lubricant and wrap electrical tape around the plugs to keep them dry.
15. Put the trailor on blocks and remove tires to prolong rubber live and HINDER BOAT THIEVES... <----h2o says biggie
16. CHECK THE OWNERS MANUAL FOR TIPS THAT ARE PARTICULAR TO YOUR OWN BRAND OF BOAT ENGINE AND TRAILOR.
Take the time to do this right, ONLY YOU CAN PROTECT YOUR INTEREST. Don't fall victum to a expensive start up season and worst of all a delay in getting that boat in the water next year.
H2o<-----------says do it right or don't do it at all......