Boat Winterization for Duxbury boat owners

Schedule winterization between mid-October and mid-November, before the first hard freeze. Once nighttime temperatures consistently drop below freezing, water left in the engine has already had time to do damage. Earlier is fine; later is risky.

Yes. Most outboards drain their cooling water when stored upright, but water trapped in a powerhead left tilted up, or water that got past a seal into the lower unit, can still freeze and crack parts. Four-strokes also need clean, stabilized fuel through the winter. Skipping winterization is one of the most common causes of spring no-start calls we see.

Some of it. Fuel stabilizer and disconnecting the battery are within reach of most owners. Engine fogging, lower-unit gear oil service, and pushing antifreeze through the cooling system require marine-specific procedures and the right tools. Mistakes here are expensive: a cracked block or a frozen lower unit is usually a total component replacement.

Shrink-wrap is a heat-shrunk plastic cover applied tightly over the boat with vents to allow airflow. It is the standard outdoor-storage cover in New England because it sheds snow, keeps the weather out, and gives mice fewer ways in. If you are storing outdoors, you need it. Our storage is outdoors, so every boat we store gets wrapped.

Much simpler. Install the battery, change the engine oil and filter if you held it for spring, run the boat on the hose, check for leaks, and launch. A properly winterized boat starts and runs the way it did the day you parked it. Spring commissioning on an un-winterized boat starts with a full diagnostic and often a fuel system rebuild.