Replacing Racor Fuel Filter: Step-By-Step Guide For Beginners

Racor fuel filters are commonly used in boats and sailing vessels. They are important for engine maintenance and ensuring the smooth operation of the vessel. Changing a Racor fuel filter is a straightforward process that can be done by boat owners themselves, although many opt to have a yard perform this task. This involves draining the filter, removing it, and replacing it with a new one. There are different types of Racor filters available, and the frequency of replacement depends on various factors such as engine hours, fuel quality, and personal preference.

Draining the filter

Before you begin, ensure you have a clean bucket or container to catch any fuel or residue that will be drained from the filter. Place this bucket underneath the filter to collect any spillage. The first step is to loosen the vent plug. This will allow you to drain the filter and access its contents. Depending on your setup, you may need to completely remove the vent plug or simply loosen it. Be cautious, as fuel may start to leak out once the vent is opened.

After loosening the vent plug, carefully remove the filter and the bowl. On some models, the bowl is made of clear plastic, so you can inspect the contents for any debris, sediment, or water. This visual inspection can provide valuable information about the condition of your fuel and engine. If you notice a significant amount of contaminants, it may be a sign that your fuel tanks need cleaning.

Once the filter and bowl are removed, it is important to properly dispose of the old fuel and any debris. Be mindful of the environment and local regulations when disposing of the drained fuel. You don't want to contaminate water sources or harm wildlife. It is recommended to have a separate container for the drained fuel and any sediment or water that has accumulated. This will make it easier to dispose of the waste responsibly.

After draining and inspecting the filter, it's important to clean the sealing surfaces and inspect the O-rings. Use clean paper towels or lint-free cloth to wipe down the area. Check the O-rings for any damage or wear and replace them if necessary. It is always a good idea to have spare O-rings and seals on hand, as they play a crucial role in maintaining a tight seal and preventing leaks.

Finally, before reassembling the filter, take the opportunity to clean the bowl and the centre turbine. This step will help ensure that your fuel filtration system is in optimal condition. Refer to a Racor maintenance manual or seek advice from a marine specialist if you're unsure about any aspects of the cleaning process.

Removing the filter and bowl

To remove the filter and bowl, start by draining the filter. Once it is drained, remove the filter and then the bowl. If you have a clear plastic bowl, you can shine a flashlight behind the glass to inspect for sediment, debris, and water in the fuel. If the bowl is not clear, you can remove it and inspect the fuel that drains out. After removing the bowl, oil the O-rings.

When removing the filter and bowl, it is important to place a clean bucket under the filter to catch any fuel or oil that may spill or leak. This will help to prevent messes and ensure that you don't lose any fuel or oil. It is also a good idea to have some rags or paper towels on hand to wipe up any spills or leaks.

If you are not sure whether to loosen or remove the vent plug, you can try loosening it slightly and then pumping to see if you are able to pick up any fuel. If you are still having trouble, you may need to consult the engine manual or seek advice from a professional or experienced individual.

It is also important to note that some people choose to fill the filter with fuel before removing it, as this can help to prevent air from getting into the system. This can be done by using a sports water bottle or an old-style oil can to squirt the fuel into the filter. However, be careful not to overfill the filter, as this can cause spills or leaks.

Overall, removing the filter and bowl on a Racor fuel filter is a relatively straightforward process, but it is always a good idea to be prepared and take the necessary precautions to avoid any messes or damage to your engine.

Oiling the O-rings

The O-rings in your Racor fuel filter play a vital role in creating a tight seal, preventing fuel leaks, and ensuring the proper functioning of your engine. Oiling them makes it easier to install or remove the filter, as it allows the O-rings to slide smoothly without bunching up, stretching, tearing, or getting pinched.

When it comes to choosing a lubricant for your O-rings, you have several options. Some people prefer using diesel oil, as it is readily available and effective. Simply dip your finger into the housing and rub a small amount of diesel oil on the O-ring. Alternatively, you can use other types of oil, such as engine oil, as long as it is compatible with the O-ring material. You can also use white lithium grease or vaseline, which are effective lubricants and protectants.

It is important to avoid using penetrating fluids like WD-40, as they may soften the O-ring material over time. Additionally, ensure that the lubricant you choose is suitable for use with fuel and oil, as the O-rings will be in constant contact with these substances.

When oiling the O-rings, apply a thin coat of the chosen lubricant evenly around the surface of the ring. This will help ensure that the O-ring can slide smoothly during installation or removal and maintain its integrity. Remember, the primary purpose of oiling the O-rings is to facilitate the installation process and prevent damage to the O-rings, rather than enhancing their sealing capabilities.

By following these instructions and tips, you can effectively oil the O-rings in your Racor fuel filter, contributing to the overall performance and longevity of your engine.

Replacing the bowl

To replace the bowl of your Racor fuel filter, you will first need to drain the filter. Once the filter is drained, remove it and then the bowl. If your bowl is made of clear plastic, as is common, you will be able to see the fuel inside. After removing the bowl, oil the O-rings. Then, replace the bowl and hand-tighten the filter.

At this point, you may be unsure about what to do with the vent plug. You can either leave it loose or remove it to get the primer to pick up the fuel from the tank. If you choose to loosen it, be sure to have a clean bucket underneath the filter to catch any overflow as the system charges.

If you are still unable to pick up any fuel, you can try using a primer bulb to suck all the air out of the filter and fuel it through the vent hole. This is a 1/4 pipe, which you can then replace with the vent plug.

Alternatively, you can take the top off the Racor and fill it with diesel. However, be aware that you will likely introduce air into the system, which will require bleeding at the injectors.

Tightening the filter

When tightening the filter, it is important to not over-tighten it. Hand-tightening is usually sufficient. If you are using a wrench, make sure to use a torque wrench to ensure you don't over-tighten. Over-tightening can damage the o-rings and cause leaks.

To ensure a proper seal, it is important to clean the sealing surfaces and inspect the o-rings before installing the new filter. If the o-rings are damaged or worn, they should be replaced. It is also recommended to oil the o-rings before installing the new filter. This will help to create a better seal and make it easier to remove the filter during the next replacement.

When tightening the filter, make sure that the vent plug is loose or removed. This will allow air to escape from the filter during the priming process. Once the filter is tightened, you can proceed with priming the filter and bleeding the system to remove any air bubbles.

It is also important to note that different Racor filters may have different tightening requirements. Some filters may have a T-handle on the top, while others may have a different design. Always refer to the manufacturer's instructions or a trusted source for specific instructions on tightening your particular Racor fuel filter.

Frequently asked questions