How to Winterize Your Boat

As temperatures drop, safeguarding your boat for the winter becomes essential. Proper winterization prevents costly damage and ensures your vessel is ready for spring. Here’s how to prepare your boat for the cold months ahead.

Preparing the Engine

Start by cleaning the engine thoroughly. Flush the engine with fresh water using muffs to remove salt and residue. This step prevents corrosion and buildup. After flushing, drain any remaining water from the engine. Consult your owner’s manual for specifics to avoid missing crucial steps.

Once drained, add a winterizing antifreeze to the cooling system. Use an antifreeze that meets your engine’s specifications. This protects against freezing and corrosion. Use a funnel to pour antifreeze directly into the engine. You’ll typically do this from the intake hose or through valves.

Fuel System Care

Fill your boat’s fuel tank to prevent condensation. Add a fuel stabilizer to keep the fuel fresh. Run the engine briefly to circulate the stabilizer through the system. This step protects carburetors and fuel injectors from gum and varnish buildup.

Protecting the Battery

Remove the battery from the boat. Clean terminals with a mixture of baking soda and water. Rinse thoroughly and dry before storage. Store the battery in a cool, dry place off the ground. Use a smart charger periodically to maintain charge levels.

Interior and Exterior Cleanup

Thoroughly clean the boat inside and out. Remove all items that can be damaged by moisture. Check for any necessary repairs, addressing them before storage.

Wash the exterior with a mild detergent. Applying a high-quality wax will help protect the finish during storage. For the interior, clean vinyl, upholstery, and carpets using appropriate cleaners.

Drain and Antifreeze Plumbing Systems

• Drain all water tanks including freshwater tanks, water heaters, and any holding tanks. Open all taps and valves to ensure complete drainage.
• Pour non-toxic antifreeze into drains and toilets. This will prevent damage from freezing and protect pipes and hoses.
• Check bilge pumps and clean them. Add antifreeze to bilge areas to prevent freeze damage.

Outboard and Inboard Engine Storage

For outboards, ensure it is rinsed and dry. Change the gear lube and grease all fittings. Store upright or using a suitable mount.

For inboards, remove spark plugs and fog the cylinders with fogging oil. This step prevents rust in the engine. Use engine storage fogging oil specifically designed for storage.

Inspection and Maintenance

• Inspect the hull for scratches, dents, or issued. Make notes of any issues to fix pre-storage.
• Check propellers and shafts. Look for bends or damage. Address any minor issues before they become major repairs.
• Review safety equipment. Ensure all life jackets, flares, and first aid kits are current and in good condition.

Covering and Storing

Invest in a high-quality boat cover that fits properly. Ensure it provides complete protection from the elements. If possible, store the boat indoors or use a professional shrink-wrap service.

Make sure the boat is stored on blocks or a trailer. Support it to prevent warping. Cover the boat completely, securing the cover tightly to prevent wind damage.

Final Checks Before Storage

Double-check all electrical and mechanical systems. Ensure all water is drained and systems are secured. Verify that covers are tight and secured. Your boat will then be ready to weather the winter.