Changing Inline Fuel Filter In Mercury Outboard: Step-By-Step Guide

Water in your boat's fuel system can ruin a day out on the water. Water can enter your boat's fuel system in several ways, including condensation in the fuel tank, an improperly positioned fuel tank fill or vent, or a contaminated supply at a filling station. To avoid this, it is important to routinely replace your engine's fuel filter. In this article, we will discuss the steps involved in changing the inline fuel filter on a Mercury outboard engine.

Locate the in-line fuel filter

To locate the in-line fuel filter on your Mercury outboard engine, you'll need to look for the filter assembly. This assembly typically has a small red clip that releases both sides of the filter. The filter itself may have a yellow handle, which makes it easier to find and retrieve from the lower pan.

The location of the filter may vary depending on the model of your Mercury engine. For example, some models may have the filter in the engine compartment, while others may have it in a remote location. If you're unsure where to find it, you can always refer to your engine's operation and maintenance manual, which will outline the specific steps for your engine. You can download or order a copy of the manual directly from MercuryMarine.com or from an authorised Mercury dealer.

It's important to locate the in-line fuel filter correctly as it plays a vital role in maintaining your engine's performance. The filter traps impurities such as dirt, debris, and rust particles, preventing them from entering the fuel system. Over time, these contaminants can clog the filter, leading to restricted fuel flow and potential engine issues. By locating and regularly replacing the in-line fuel filter, you can ensure optimal engine performance and protect its components.

If you're preparing to change the in-line fuel filter, make sure you have the necessary tools and replacements. You'll need a new Mercury in-line fuel filter, paper towels or rags, and a flathead screwdriver. Additionally, it's recommended to have an adjustable filter wrench, a catch pan, and a container for the fuel that will be drained from the filter.

Set a paper towel drip barrier

To set a paper towel drip barrier when changing a Mercury in-line fuel filter, follow these steps:

First, locate the in-line fuel filter. The filter assembly typically has a small red clip that releases both sides of the filter. Once you've found it, place paper towels or rags directly below the filter. This will catch any fuel that may drip and prevent spills during the filter removal process. Make sure you cover a wide enough area so that any dripping fuel will be safely absorbed by the paper towels. It's better to be generous with the paper towels and avoid any mess or spillage.

This step is important as it ensures that any excess fuel is contained and can be disposed of properly. It also keeps your work area clean and safe, reducing the risk of any accidental fires or spills. It is always important to be cautious when working with flammable liquids such as fuel.

Release the filter

To release the filter, you will need a flathead screwdriver. Place paper towels or rags directly below the filter to catch any fuel that may drip and prevent spills during the removal process.

The filter assembly will have a small red clip that you need to press with the flathead screwdriver to release both sides of the filter. Push the screwdriver in firmly, and then try to move the filter to pop it off. You may need to push it in and wiggle it a little to release the filter.

Once the filter pops out, carefully pull it out while keeping your thumb on it to contain any remaining fuel.

Catch excess fuel

To catch excess fuel when changing the inline fuel filter on a Mercury outboard engine, you will need to place paper towels or rags directly below the filter to prevent fuel spills during the filter removal.

• Place paper towels or rags directly below the filter. This will create a barrier to catch any dripping fuel and prevent spills during the removal process.
• Use a flathead screwdriver to press the red clip and release both sides of the filter. Push it in firmly and then try to move it to pop it off.
• Place your thumb over the filter to prevent fuel from spilling upon removal.
• Once the filter pops out, carefully pull it out while keeping your thumb on it to contain any remaining fuel.
• Dispose of the old filter properly and clean up any spilled fuel.

It is important to note that you should always consult your engine's owner's manual for specific instructions and information regarding the fuel filter change process. Additionally, make sure to wear appropriate protective gear, such as gloves and eye protection, during the fuel filter replacement.

Remove the old filter

To remove the old filter from your Mercury outboard engine, you will need a flathead screwdriver, paper towels or rags, and a catch pan to collect any excess fuel.

First, locate the in-line fuel filter. The filter assembly typically has a small red clip on both sides of the filter. Place paper towels or rags directly below the filter to prevent fuel spills during the removal process.

Next, use the flathead screwdriver to press the red clip and release both sides of the filter. Push the screwdriver in firmly, and then try to move the filter to pop it off. Once the filter pops out, carefully pull it out while keeping your thumb on it to contain any remaining fuel.

Before disposing of the old filter, inspect it for any signs of oil contamination. This will help you identify any potential issues with your engine.

Frequently asked questions