Back by popular demand is this article from the October,

1999 BoatHouse. 

Dear Dr. Motorhead,

The surface of the lake, like a mirror, is reflecting the morning sun through ghost-like images as the mist rises from the warm waters in the cool morning air. The geese are beginning to gather and flock but a few yards from my dock. As the squirrels nervously scurry about the yard hoarding what appears to be a whole winters worth of acorns bulging their cheeks, fall is arriving to Minnesota. It seems like only yesterday, we were celebrating Spring’s first arrival, anticipating the long lazy days of summer. This time of year, we squander the sun-drenched autumn days with beautiful colors and long shadows. Only too soon, our boats will be tucked into their storage areas awaiting Spring’s return. 

My mind drifts from the splendor to the inevitable: yielding to mother nature and preparing for the winter ahead, hauling out and winterizing before the winter winds and freezing temperatures set their icy grip. As an ounce of prevention is worth a pound of cure, I so desire to perform all the necessary winterizing tasks that insures the safe hibernation of my beautiful craft. My recent Spring purchase has yet to afford me the experience and knowledge to perform such tasks. Anxiety ridden, I ask, will my beloved runabout fall victim to the Y2K winter? Can you share with me your insight, wisdom and advice as to the proper wintering techniques and correct storage? I am sure you and your trusted assistant, Piston, must be so very busy this time of year. In addition, your backlog of letters awaiting responses must be enormous. Could you find it in your heart to rejoinder and pontificate to this timely request? If I don't hear from you, I understand. However, my only recourse in that instance, is to ship my boat to Florida for the winter. Your insight and wisdom are beyond reproach. I am at your mercy.

Signed 
Prolific Pendocrast III

Dear Pro,
Yikes, get off your knees! It's not becoming to a gentleman of your apparent stature. I am encouraged that you have the desire not only to enjoy your beloved runabout, but maintain and preserve it as well. Working on your own boat is not only a money-saving adventure, it is also fun and rewarding. While Piston is looking up the words rejoinder and pontificate in our dictionary, I'll take this time to answer and give understanding to your query. Get out your pad and pencil, cause here's the skinny. 

1. Don't wait too long to get all this done. Winter can hit and hit hard as early as late October, making your job  miserable or even impossible.

2. You need to change the oil in your motor. Sometime in late September early October, when that warm sunny day arrives, get ready to do your work. Don't procrastinate, it will probably be the last. Go for a boat ride. This will warm up the engine oil. Warming your oil thins it out allowing you to remove the old oil with a marine oil pump. There are a number of different pumps that do the job. Buy one and enjoy it; this is one of life's little pleasures. The old oil contains acids that are corrosive and harmful to your engine during the many months of winter storage. Help your engine and change that oil. After the oil is changed, run your boat to the boat landing. This gives the new oil a chance to coat all the internal engine parts for the long winter ahead.

3. With your boat out of the water, add a few drops of oil to generator and distributor oil ports. Open up the distributor and spray WD40, or the like, into the lower part of the distributor. This will prevent the spark advance counterweights from getting rusty and stuck. 

4. Next, drain the engine of all its water. There are drain plugs on all engines. They all must be opened and drained completely of water. If not completed correctly, the result is a cracked block. Engine manufacturers are different, with varying locations to drain the water. If you need specific information for your particular motor, consult Steve Merjanian or Jeff Stebbins for the proper locations. Once you have opened these drains, especially the drains located on the engine block, probe a piece of wire into the hole. Many times a strand of seaweed or a chunk of sand gets lodged in the hole and won't let the water out. Another neat technique I have observed Jeff perform, is to start the engine while holding a board over the exhaust pipe. This forces  the exhaust gasses through the engine, thus blowing out all water and any debris from the engine. Try it,  it's slick.

5. Your next task it to fog the engine. There is only one way to perform this task. You will need to purchase a can of Stor-X. In my opinion, no other product does the job. It's just that simple. Start your engine and set the throttle at 2000 RPM. With the flame arrestor off the carburetor, slowly pour about half the can into the carb. The mixture must get sucked into the engine and not just poured into the carburetor itself. The engine will run rough and smoke a lot. This is good. Turn off your motor and pour the remaining amount of Stor-X into the gas tank.

6. Make sure your battery has a good charge, and disconnect the battery terminals. It's OK to leave the battery in the boat, but only if it has a good charge.

7. What to do with the gas in the tank? Some say that a full tank is best. This helps prevent the possibility of  corrosion. Some say an empty tank is best - less  hazardous materials in close-storage quarters. In addition, the gasoline today is much less stable; 
octane breakdown occurs much faster today. Six months of storage leaves you with a much weaker gasoline. I prefer the empty or near-empty scenario. Top off the tank with fresh gas in the Spring. This method has never created any problems for me.

8. It never hurts to stick a rag in the exhaust pipe and the carburetor openings. This helps keep moisture from entering the engine through any open or partially opened engine valves.

9. If you do not own a storage trailer, you should. Not only does it make your job easier, the support the trailer gives your boat is very beneficial. 

10. In conclusion, when you haul your boat earlier rather than later, you allow your boat to dry out. This is very important, especially for you who have opted to install a "west system" bottom.

Dr. Motorhead