How do you winterize an inboard motor?

How do I keep my inboard motor from freezing?

Propylene glycol will lubricate and coat the inside of your engine and hoses to prevent them from any corrosion over the winter. Marine anti-freeze is good for up to -50 degrees Fahrenheit.

Do you need to put antifreeze in an inboard motor?

Do you have to use antifreeze when you winterize your boat? You should use antifreeze to winterize your boat if you have an inboard engine or any systems with pipes or that carry water. You should also consider using it in your bilge. For outboard motors, you don’t have to use antifreeze.

Do you leave antifreeze in boat engine?

You do NOT want to leave puddles or buckets of engine coolant lying in the open, and it must be handled carefully and disposed of properly. Boat antifreeze is a tasteless and non-toxic blend of propylene glycol and water used for preventing freezing in boat systems.

Will my boat engine freeze?

At what temperature will a boat engine freeze? Unwinterized boat engines can freeze any time the air temperature is below 28°F (-2°C) – for an extended period. Freshwater cooled engines without proper coolant can freeze below 32°F (0°C). The good news is you can prevent freeze damage fairly easily.

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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.

How do I keep my engine block from freezing?

Freeze plugs (casting or core plugs) are designed to come out in the event of the coolant or water freezing in the engine block preventing the block or heads from cracking as the water turns into ice.

Can I leave my boat outside in the winter?

You can keep boats outside in the winter if you provide adequate protection against harsh weather. But you can’t simply park the boat on your driveway as most people do during the boating season. Leaving your boat outside during the cold season can damage the boat.

Can I winterize my boat myself?

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.

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