A Craft Winterisation Checklist

1. Engine and Mechanical Systems:

Engine Oil and Filters: Change the engine oil and replace the oil filter to remove contaminants.

Cooling System: Drain raw water from the cooling system or add antifreeze (non-toxic, marine-grade) to prevent freezing.

Fuel System: Fill the fuel tank to prevent condensation and add a fuel stabiliser to prevent fuel degradation.

Impeller: Inspect and replace the impeller, if necessary.

Batteries: Disconnect and remove batteries. Store them in a warm, dry place and keep them charged with a maintenance charger. Check all connections and test with a MultiMeter unit to record charge in each battery.

Propeller and Shaft: Inspect the propeller and shaft for any damage. Apply marine grease (acid free type) to the shaft to prevent corrosion. Consider similar best practice for stern drives.

2. Water Systems:

Freshwater System: Drain the freshwater tank and all associated pipework. Use compressed air to blow out any remaining water or add antifreeze (potable water-safe).

Water Heater/ Calorifier: Drain the water heater and bypass it, if necessary.

Heads Toilets and Holding Tanks: Pump out and rinse the holding tank with requisite treatment. Add antifreeze to the toilet system to prevent freezing.

Bilge Pumps: Ensure bilge pumps are operational and free of debris. Add antifreeze to the bilge to prevent freezing.

3. Exterior and Hull:

Hull: Clean and wax the hull to protect it from ice and debris.

Through-Hull Fittings: Inspect and lubricate all through-hull fittings. Ensure seacocks are closed and drain plugs are removed.

Deck apertures: Make sure they are clear of debris at all times; otherwise, water ingress may occur internally as the water cannot flow away smoothly.

Anchors and Chains: Clean and store anchor(s) and galvanised chain in a dry place. Ensure striker plate/anchor aperture hole is clear of debris.

Canvas and Covers: Remove and store canvas covers, tonneaus, biminis, and dodgers. Use a fitted boat cover to protect the cruiser.

4. Interior:

Cabin: Clean and dry the interior thoroughly to prevent mould and mildew. Use moisture absorbers, or a dehumidifier. Rig it to work on 220 volts and empty the humidifier collection tank via a tube that drains into the sink.

Cushions and Upholstery: Remove cushions, and store them in a dry, ventilated area. Avoid potential for mildew.

Electronics: Disconnect and remove sensitive electronics. Store them in a warm, dry place.

Ventilation: Ensure all vents are open to allow airflow and prevent condensation.

5. Plumbing and Drainage:

Sinks and Drains: Pour antifreeze into sinks, showers, and drains to protect traps and pipes.

Air Conditioning System: Drain the system and add antifreeze, if necessary.

6. Safety Equipment:

Fire Extinguishers: Check and recharge fire extinguishers, if needed. This is not critical. However, if a new extinguisher unit was fitted it comes with a 5-year warranty. From 6th year onwards it needs to be tested annually.

Life Jackets and Safety Gear: Inspect and store life jackets and safety gear in a dry place.

7. Documentation:

Logs and Manuals: Update maintenance logs and store manuals in a safe, dry place.

Insurance: Check over and verify that your insurance policy covers winter storage and potential cold-weather damage. Many boaters don’t check for this key need.

8. Storage Location:

Indoor Storage: If possible, store the boat indoors to protect it from the elements. If not, hard standing will suffice especially if protected from prevailing winds.

Outdoor Storage: If storing outdoors, ensure the boat is securely covered and in an elevated position to prevent snow accumulation on decks and canopy.

9. Final Checks:

Walkthrough: Perform a final walkthrough to ensure all systems are winterised and all items are secured.

Ensure the boat is locked and secure. Use a boat alarm system, if available. This will allow you to check on its state remotely.

Following this Checklist, you can ensure that your motor cruiser remains in excellent condition during the winter months.

Always refer to your owner’s manual for specific recommendations and consult a marine professional, if you’re unsure about any of the steps above.

Naturally, reverse the steps suggested when you re-commission the craft for spring, summer, and autumn usage.