Boat Winterizing

A few pounds spent in autumn saves hundreds in spring. Our boat winterising collection gathers everything needed for a proper lay-up: non-toxic antifreeze for engines and water systems, fuel stabilisers and diesel bug treatments, dehumidifiers and moisture absorbers for the cabin, engine fogging and protection products, and covers and tarpaulins to keep the weather out.

The essentials of a good winterisation are simple: protect the engine's raw water system with antifreeze, stabilise and treat the fuel with a full tank, drain or protect the freshwater system, ventilate and dehumidify the interior, and cover the boat properly. Do those five things and the spring recommissioning becomes a pleasure rather than a repair bill. Ask in store for a checklist tailored to your boat.

Frequently asked questions

How do I winterise a boat engine?

Flush the raw water cooling system and run non-toxic antifreeze through it, change the oil while warm, treat and fill the fuel tank, and protect the cylinders per your engine manual. Inboard and outboard procedures differ, so follow the manufacturer's steps.

What antifreeze should I use in a boat?

Use non-toxic propylene glycol antifreeze for engine raw water circuits and freshwater systems - never automotive ethylene glycol in any system connected to drinking water or discharged overboard.

Should I leave a dehumidifier on my boat over winter?

Yes, where safe shore power allows - a small marine dehumidifier or moisture absorbers dramatically reduce condensation, mould and mildew in a closed-up boat over winter.

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