a solid gel at -8 degrees F.) There are two methods of winterizing a raw-water-cooled engine or the raw-water side of a freshwater-cooled engine: draining the system and leaving it dry, or filling it with winterizing antifreeze (propylene glycol).
The heat from the water will prevent the lower unit from freezing and conduct somewhat into the engine, lowering the temperature. A mechanic told me that it has to be below 32 degrees for the majority of the day for several days before any engine damage will occur.
Of course, as BOATUS states, the best winter storage space for your boat is “indoors, in a climate‑controlled facility with a backup generator.” This means that you need control over the temperature in your garage. A good garage door that seals out the cold will help keep your boat safe over the winter.
If you plan to use your boat year-round, and you live in a place where the temperature dips below freezing occasionally, you should winterize systems such as the water holding tank, showers, livewells, faucets and the head system — if your boat has them — and don’t use them during winter.
For the handy, self-sufficient boat owner, taking care of winterizing yourself is a great way to save money. Ironically, DIY can potentially even save you some time. Winterizing a boat can be done in less than an hour in many cases, less time than you’d spend just driving the vessel to and from the marina or shop.
Re: Need to winterize if storing boat indoors? Yes you have to winterize, just to much to risk for a couple of bucks.
If You Don’t Winterize Your Boat, Here’s What Happens. Water freezes and expands and can damage anything it’s trapped inside. Water may seep into unprotected spaces to do this. Mold and mildew take root, and you may come back to a boat in the spring that you can not use because of multiple system failures.
Thanks to an unusually mild December, it’s not too late to winterize your boat. Boats are no different. That’s why it’s prudent to have a winterization check list. Begin with the boat, motor and equipment manufacturer’s winter setup recommendations.
Follow these tips for staying warm while onboard this holiday season. Heaters. Do: Do get a heater—or many. Shrink Wrapping. Do: Consider creating a plastic cave. Oil Lamps. Do: Get a couple of oil lamps. Blankets, Christmas Sweaters & Slippers. Do: Do wrap up. Baking, Cooking & Drinking. Sharing Body Heat. Relocating.
Winter Outboard Freeze Protection Trim motor all the way down and let sit for a few seconds (you’ll see water draining from the motor ). When the draining slows trim the motor all the way up again. Trim the motor all the way down again and drain any remaining water. Stow motor as usual.
When you park the boat for the winter keep the motor trimmed or tilted down, especially if it’s outdoors. This will allow all of the water to drain out of the motor’s cooling system. If it’s tilted up, some water may remain in the motor, where it can freeze and cause a cracked block or a ruined water pump housing.
Winterization of a boat is a process by which all of the water is completely removed in any component that could have the potential to store even a few drops. This preventative effort will eliminate the possibility of water- what seemed like your boat’s best friend- causing serious damage to your beloved ride.
Temperatures of 25 degrees Fahrenheit (-3 degrees Celsius) can result in a boat engine block cracking if left unprotected.
Like inboards and sterndrives, outboard engines are also subject to potential damage from freezing and from being laid up in disuse for months at a time. So outboards demand winterizing too.
If you want your engine to start in the spring and last you many years and plan on not using your engine all winter, you do have to winterize an outboard motor. Winterizing the engine helps to prevent damage during disuse, which is the chief cause for engine failure. Failing to winterize may lead to complications.