What temperature should I winterize my boat?

Asked By: Vannessa Alzola | Last Updated: 7th January, 2020
Category: automotive road side assistance
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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).

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Also, at what temp should you winterize your boat?

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).

One may also ask, do I need to winterize my outboard? Wrench and socket that fits screws on your engine's air box cover. If your engine has a fogging oil fitting, you do not need to remove the air box cover. Four-stroke outboards have a plastic air intake that you spray the fogging oil into. Fuel stabilizer in a size to treat your fuel tanks.

Also asked, how cold does it have to be for a boat engine to freeze?

If you are not using any anti-freeze, and you only have water in the engine and lines, then the water will begin to freeze at 32 degrees Fahrenheit and below. One other thing you need to keep in mind is the amount of time that the engine is sitting in freezing temperatures.

What happens if you don't winterize your boat?

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. Acidic and corrosive wastes, salt and corrosion buildup can damage delicate parts in engines.

29 Related Question Answers Found

Will an outboard motor freeze?

When the air temperature is below freezing, always keep the motor in its down position when it's not running. Water in the submerged portion of the motor will not freeze. If you pull your boat ashore, try to lift the stern with the motor lowered to drain as much water as possible from the outboard.

How can I keep my boat warm in the winter?

Electric boat heaters can be used in the cabin to warm the living space or in the engine compartment to keep the engine warm and dry. Just make sure to get the right one for the job, as cabin heaters and engine compartment heaters (also called bilge heaters) have different uses and features.

How do I winterize my boat myself?

Cheat Sheet on How to Winterize Your Boat
  1. Fuel Treatment. Treat your boat's fuel with a stabilizer.
  2. Fog the Engine Cylinders. Aerosol fogging solutions coat the inside of the engine to protect it until spring.
  3. Change the Oil. Change engine oil to eliminate moisture and prevent corrosion.
  4. Drain the Gear-Case Lubricant (and recycle it)

At what temperature will an engine block crack?

32 degrees is all it takes to freeze water with no additives like alcohol or antifreeze and, if in a confined space (engine block), eventually crack something.

Do all boats need to be winterized?


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.

Do Yamaha jet boats need to be winterized?

Winterization of Yamaha Jetboats. If you live in an area where you can't use your boat year-round, you may need to winterize it. If you have a lay-up period of perhaps 3 months or less, you probably don't need to worry about fuel treatment or fogging oil.

What happens if water freezes in engine?

When this happens, water can't circulate through the radiator and even in low temperatures the engine can overheat and damage can result. But when the radiator is frozen, there will be no steam and you won't know to shut the engine down until it seizes, by which time it is too late.

How do I keep my engine block from freezing?

To avoid causing damage, follow these simple steps.
  1. 1) Don't run the car. It's a reasonable idea: switch the car on and the engine will gradually warm up, loosening up the cooling system and helping to get the fluids moving again.
  2. 2) Allow time to thaw.
  3. 3) Check your coolant/antifreeze levels before winter arrives.

Will cold water crack engine block?


Do not pour cold water into a still-hot radiator — it could cause the engine block to crack due to the sudden change in temperature. If you absolutely have to add water while the engine is still warm, pour slowly while the engine is running in neutral or park.

How long does it take a boat motor to freeze?

It would take a hard freeze of about 20 degrees for a day. 30 degrees would not do it for 4 hours.

When can you Dewinterize a boat?

As soon as the weather gets below 32 degrees, water begins to freeze, with water with impurities or saltwater in it starting to freeze at 28 degrees. In most cases, the water will not freeze solid (leading to cracked engine blocks) until the temperatures stay below 32 for several days and nights.

How do you winterize an inboard outboard motor?

How to Fully Winterize Inboard Boat Motors in 4 Steps
  1. Prepare Your Inboard Boat Motor for Winterizing. Fill the tank with gas.
  2. Add Antifreeze and Spraying Fogging Oils. After your motor is cleaned and prepared as described above, the first real winterization step is applying antifreeze.
  3. Change the Engine's Oil and Replace Oil Filter.
  4. Do a Final Inspection.

Should I Fog my boat motor?

Before the engine runs out of fuel, spray fogging oil into the carburetor(s). Fogging oil is an anticorrosive that will protect the internal surfaces of the carburetor and the cylinders. As that happens, give the carburetor(s) a heavier shot of fogging oil to make sure internal surfaces are fully coated.

Do you have to winterize a 2 stroke outboard motor?


Winterizing a 2-Stroke Outboard Motor
Regardless of the season, you should winterize your outboard anytime it isn't going to be used for more than a month. You don't have to wait for snowflakes to fall to winterize an outboard.

How much does it cost to winterize a boat?

Now for the big reveal: The average cost of winterizing a boat is about $300.

Why do you have to winterize a boat?

Water expands when it freezes and not properly winterizing your engine can lead to a cracked block, necessitating engine replacement. Even a short freeze can cause expanding ice to crack a manifold. To circulate antifreeze through the engine: If the boat is in the water, close the intake seacock.