Quick Answer: How To Winterize A Mercruiser 5.7 Liter Engine?

Where are the drain plugs on a 5.7 Mercruiser?

Re: Mercruiser 5.7 Engine Block Drain Location



they are almost directly under the the manifold drains, about 6 inches down further, right where there oil pan meets the motor, basically in the middle of the motor from front to back.

How do you winterize an inboard engine?

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.

How do you winterize a 3.0 MerCruiser?

How to Winterize a Mercruiser 3.0

  1. Determine the amount of fuel you have stored in your tank by turning the key to the accessory position.
  2. Pour the proper amount of fuel stabilizer into the fuel tank by referring to the chart on the bottle.
  3. Remove the drain plug with a 9/16-inch wrench.
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How do I keep my inboard motor from freezing?

A similar snap-on cover or a heavy-mil plastic garbage bag slipped up over the outdrive and tied at the top will prevent the engine compartment heat from dissipating through the exposed metal. When a freeze is forecast, you can also put your boat back in the water, since water provides greater insulation than air.

How do you winterize a Mercruiser sterndrive?

Here are the other key steps to winterizing a sterndrive.

  1. Drain Residual Water. First, run the engine on a flusher and get it up to operating temperature so that the thermostat opens.
  2. Fill with Antifreeze Solution.
  3. Drain/Replace Gear Lube.
  4. Check the Prop Shaft.
  5. Inspect Everything.

Do I need to winterize my boat if I keep it in the garage?

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.

How do you winterize a MerCruiser 496 HO?

the 496 is easy to winterize. there’s a small air pump on the heat transfer tube on the top front of the engine. You remove a few plastic drain plugs and then pump air into the system and that pumps water out of the exhaust manifolds. The whole process takes about 5 minutes.

How many gallons of antifreeze do I need to winterize my boat?

Instead of using a winterizing kit, you’ll need a five-gallon bucket, and enough antifreeze for your engine and related plumbing (at least two gallons). If your engine takes a lot of antifreeze, you might also need a helper to add antifreeze to the bucket as needed.

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How do you winterize a fuel injected boat?

10 Tips for Engine Winterization

  1. Run 15 Minutes on Stabilized Fuel. “Run the engine at least 15 minutes with stabilizer in the tank to circulate the fuel completely throughout the system,” Meeler suggests.
  2. Pull Plugs to Fog EFI Engines.
  3. Seal Off the Engine.

What oil does a 5.7 MerCruiser take?

Engine Oil

Application Recommended Oil
All MerCruiser engines Mercury MerCruiser Full-Synthetic Engine Oil, 20W-40, NMMC FC-W rated

How do you drain water out of a boat engine block?

Locate and open the petcocks (some engines have bronze plugs similar to bilge plugs) underneath the manifolds and on the sides of the engine block. Remove the water-pump hose from the bottom of the water pump to let it drain completely.

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