Winterize 4 Stroke Mercury Outboard Motor

For many boat owners, winterizing a 4 stroke mercury outboard motor is an important task that should not be taken lightly. It is essential to prepare the engine before cold weather sets in, and to ensure that the motor runs smoothly and reliably when the weather warms up again. This process can be complex and time consuming, but taking the time to properly winterize your 4 stroke mercury outboard motor will extend its life and allow you to enjoy your boat for many years to come.

Winterizing a 4 stroke mercury outboard motor is a complex process that requires patience and attention to detail. It involves draining all of the fuel from the tank, adding stabilizers to the remaining fuel, changing the oil, flushing the cooling system, and much more. With so many steps involved, it is important to have a plan of action and take the time to do the job right. In this article, we will provide a step-by-step guide to winterizing your 4 stroke mercury outboard motor, so that you can get back on the water as soon as the weather warms up.

The first step in winterizing a 4 stroke mercury outboard motor is to drain the fuel tank. You will need to start by disconnecting the fuel line from the tank, and then draining the fuel into an approved container. Once the fuel is drained, you should add a fuel stabilizer to the remaining fuel in order to prevent it from going bad over the winter months. After that, you should reconnect the fuel line and run the engine for a few minutes in order to circulate the fuel throughout the system.

Next, you will need to change the oil and filter in your 4 stroke mercury outboard motor. This is an important step that should not be overlooked, as dirty oil can cause serious damage to the engine. You will need to warm up the engine for a few minutes before draining the oil, and then replace it with fresh oil of the same type and viscosity. Once the new oil has been added, you should also replace the oil filter.

Once the oil has been changed, you should flush the cooling system of your 4 stroke mercury outboard motor. This can be done by attaching a garden hose to the cooling system’s flushing port and running the engine for several minutes. This will help to clear out any dirt and debris that has built up in the system over the summer months. Once the flushing is complete, you should add a mixture of antifreeze and water to the cooling system.

Lastly, you should inspect your 4 stroke mercury outboard motor for any signs of damage or wear. Look for cracks in the powerhead, loose bolts, or other signs of wear. If any issues are found, they should be addressed before the engine is stored for the winter. Once the inspection is complete, you should apply a coat of storage oil to all external metal surfaces, such as the exhaust outlets, to help protect them from corrosion.

By following these steps, you can ensure that your 4 stroke mercury outboard motor will be ready to hit the water when the weather warms up. Winterizing your engine now will save you time and money in the long run, so don’t hesitate to take the necessary steps to keep your boat in top condition.

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