Mercury Outboard Oil Filters

Mercury Marine Engine Oil Filters Resources and Information

Changing your spent oil is critical for extending the life of your Mercury outboard motor. PartsVu.com offers a full line of certified Mercury and Mercruiser outboard oil filters. We also stock convenient outboard oil change kits to make your next oil change a snap. Unsure of how often your outboard oil needs changing? Check out our helpful Mercury Outboard Service Schedule.

PartsVu.com is happy to offer a wide selection of certified Mercury marine engine oil filters and strainers to match the exact specifications of your Mercury outboard motor. If you need assistance changing your Mercury outboard’s oil, follow along with this helpful guide over on our blog. We also stock convenient Mercury Oil Filter Multipacks– so you can save money by buying in bulk! Or, browse the rest of our Mercury outboard parts.

We also offer helpful resources to help you maintain your Mercury outboard motor, such as:

• Mercury Outboard Maintenance Parts Charts
• Mercury Outboard Engine Schematics
• Mercury Outboard 100-hour Service Guides

Mercury Outboard Oil Filters FAQs

How do I change my Mercury 4-stroke outboard engine oil?

As the old oil is draining, you can work on removing the engine oil filter. Depending on your specific Mercury model, your filter may have a drain lip that helps to keep the mess to a minimum when you unscrew the old filter. However, most older engines do not have this feature. We suggest being prepared with plenty of absorbent rags or placing a small cup that is cut to size below the filter before removal. Using a PartsVu Maintenance Essentials filter wrench is the best way to loosen the filter. Remember when you reinstall the filter, over-tightening will only make your life more difficult when you are ready for the next service. Some technicians puncture the old filter allowing trapped oil to drain back into the block before removal, but this will ruin your ability to take the filter apart for further inspection.

Several laboratories provide performance testing of used oils, allowing you to learn more about the health of your engine. Blackstone Labs is one such provider, and they have a convenient mail-in kit that includes everything you need to submit an oil sample. They can also test gear oils, hydraulic fluids, and oils from your other vehicles or toys. Oil test results can tip you off to an accelerated wear condition inside of your engine long before any other symptoms show up. If you still want to know more about your engine, purchase an oil filter cutter and open the spent filter to look for evidence of contamination and metal dust or shavings.

Once you have inspected your spent oil and filter, set them aside for proper disposal. If you removed the drain screw to empty your oil, carefully reinstall the drain plug. The new oil filter should be removed from its package and the o-ring lubricated with a thin coat of fresh engine oil. Spin on the new oil filter and gently tighten to seat the o-ring without over-torquing.

Mercury Marine offers a wide assortment of engine oil – both in blend and viscosity. If you are uncertain as to which oil is best for your application, consult your owners’ manual. Loosen the yellow oil fill plug on the top of the engine and pour in fresh oil. We recommend adding slightly less than the stated capacity. With the engine trimmed down, check the oil level on the dipstick after allowing a few minutes for the oil to drain into the oil pan properly. Filling the oil to the lower level on the dipstick will help you to measure if the oil level changes over time with the engine in operation.

How do I change my Mercury 2-stroke outboard engine oil?

Engine oil selection is critical to long life, so review the information in your owner’s manual to make certain you are using the correct products. Not all TCW3 oils are formulated the same, and different Mercury models do prefer specific oils. Mercury Marine offers a wide assortment of engine oil – both in blend and additives. If you are uncertain exactly which oil is best for your application, consult your owner’s manual.

If you do locate contamination in the oil tank, use a vacuum extractor to pull the remaining oil out of the tank for proper disposal. While good quality two-stroke oil is certainly expensive, running contaminated oil can lead to catastrophic failure. If you have never cleaned the bottom of your tank, prepare to be surprised by what you find.

Several laboratories provide performance testing of used oils, allowing you to learn more about the health of your engine. Blackstone Labs is one such provider, and they have a convenient mail-in kit that includes everything you need to submit an oil sample. They can also test gear oils, hydraulic fluids, and oils from your other vehicles or toys. Oil test results can tip you off to an accelerated wear condition inside of your engine long before any other symptoms show up. If you still want to know more about your engine, purchase an oil filter cutter and open the spent filter to look for evidence of contamination and metal dust or shavings.

How do I service my Mercury 4-stroke outboard fuel system?

Use a filter wrench to loosen the existing filter element and use caution when removing it as it will be filled with gasoline. A clear plastic or glass container is helpful to dump the filter and examine the contents. A small amount of debris is common, as is a small amount of water after the fuel has had a moment to settle. More significant amounts of water would warrant further investigation.

Move back to the engine and locate the filter element(s) on the engine. The scope of this service will only include the low-pressure fuel filter and fuel water separator if applicable by model. Mercury recommends that owners do not service their high-pressure fuel filters. Depending on your engine model, the water separator filter (or castle filter) may be removed by using a wrench, standard tools, and a little caution. Unplug the water-in-fuel sensor if applicable and spin the cap off of the housing. Replace the filter element with a fresh one, lube the o-ring with grease or oil, and carefully reinstall the cap.

Locate your Mercury engine’s primer bulb if applicable and use the primer to pump up the fuel system. You should feel and hear gasoline entering and filling the filter cup. Check for leaks and prime until the bulb becomes firm.

If you are not already regularly running Mercury Quickare and/or Mercury Quickleen through your Mercury fuel system, the 100-hour service interval is an excellent time for a “shock treatment.” Quickare is a fuel system cleaner and top-lube that will help to clean deposits from the tank, lines, carburetors, injectors, and pumps. It breaks up fuel system varnish and will help to prevent gumming.

Quickleen is a fuel system conditioner that also helps to remove carbon deposits. The standard dose is one ounce per ten gallons, but if you are not running the product regularly, you can double that ratio for more cleaning power. Pour the products into the fuel tank fill and run the boat. No additional work is needed. It is a great idea to inspect your fuel tank fill’s o-ring for damage when you add fuel or additives as a damaged o-ring can allow water from rain or boat washing into your fuel system.

How do I protect my Mercury outboard engine?

Cover it with Corrosion Guard. This rust inhibitor forms a water-resistant barrier on both painted and unpainted surfaces. We recommend using it at every service interval with a liberal application to all metal engine surfaces. You can also use it on outdrives, lower units, and power trim motors.

The marine environment is one of the harshest on the planet. This is why protecting your boat from corrosion is extremely important. For premium defense against rust, we highly recommend this product.

In order to maximize your engine’s performance, use this complete fuel treatment at every fill-up with any grade of gasoline. Quickare is an excellent defense against the problems associated with ethanol-blended fuels, including its corrosive effects on metals as well as the gum and varnish that result from fuel oxidation. See PartsVu’s Knowledge Center for our article on the problems of ethanol gasoline.

This product can also be used to clean up existing deposits in untreated fuel lines, tanks, carburetors, injectors, intake valves, and spark plugs. It will keep your fuel fresh for up to three months and can be used in all 2 and 4 cycle carbureted and fuel-injected gasoline engines. Use one ounce to treat every 10 gallons of fuel.

What tools are required for changing lower unit oil Mercury 2 stroke outboards?

The tools required for changing lower unit oil on Mercury 2-stroke outboards may vary depending on the specific model and year of the outboard, but generally, you will need the following tools:

1. Oil drain pan: to collect the old oil that is drained from the lower unit
2. Socket wrench or adjustable wrench: to remove the drain plug and vent screw on the lower unit
3. Oil pump: to fill the lower unit with new oil
4. Funnel: to pour the new oil into the oil pump
5. Lower unit gasket: to replace the old gasket when reinstalling the drain plug and vent screw

It's important to consult the owner's manual or a trusted mechanic for the specific tools required for your Mercury 2-stroke outboard.

Where can I buy Mercury oil filters?

Mercury oil filters can be purchased at authorized Mercury Marine dealers, marine supply stores, or online retailers that specialize in marine engine parts.

Who makes Mercury marine oil filters?

Mercury Marine produces its own oil filters under its own brand name. These filters are specifically designed to meet the high demands of Mercury outboard engines and are constructed using high-quality materials.

Can I reuse Mercury oil filters?

It is not recommended to reuse oil filters on your Mercury outboard. Oil filters trap dirt, debris, and other contaminants, which can cause engine damage if not properly filtered out. Reusing a filter can allow contaminants to remain in the oil, reducing its effectiveness and potentially causing damage to the engine. Always replace your Mercury oil filter with a new one during each oil change.

What is a Mercury outboard oil filter chart used for?

A Mercury outboard oil filter chart is used to help boaters and mechanics identify the correct oil filter for their specific Mercury outboard model. The chart provides information such as the model number, year of production, and engine size to ensure that the correct filter is selected. Using the wrong filter can result in poor engine performance, damage to the engine, and potential safety hazards while operating the boat. Therefore, it is important to consult the chart or speak with a knowledgeable technician to ensure the proper oil filter is used during oil changes.

How to add oil to Mercury outboard 2 stroke?

To add oil to your Mercury outboard 2 stroke, follow these steps:

1. Ensure that your outboard is in a vertical position.
2. Locate the oil cap, which is usually on the lower part of the engine's casing.
3. Unscrew the cap and wipe off any debris or dirt around the cap and the area.
4. Use a funnel to add the recommended type and amount of oil to the engine. The recommended oil level should be between the "minimum" and "maximum" marks on the dipstick.
5. Screw the oil cap back on and tighten it securely.

Do 2 strokes have oil filters?

Not all 2-stroke outboards have oil filters. Some older models may not have oil filters, and oil changes are performed by draining and refilling the oil tank. However, newer 2-stroke outboards may have oil filters, and it's important to consult your owner's manual to determine if your engine has an oil filter and how to properly maintain it.

How long do Mercury engine oil filters last?

Mercury engine oil filters should be replaced every 100 hours of use or annually, whichever comes first. However, if the engine is used in harsh conditions or is run for extended periods, more frequent filter changes may be necessary. It is important to consult the manufacturer's recommendations and follow a regular maintenance schedule to ensure the engine operates at its best.

What are Wix oil filters for Mercury outboards?

Wix filters are a brand of oil filters that are compatible with Mercury outboard engines. They are designed to meet or exceed OEM specifications for filtration and performance. Wix filters are made from high-quality materials and have a reputation for reliability and durability. They are widely available and can be purchased from a variety of retailers or online outlets. If you are looking for an alternative to Mercury brand oil filters, Wix filters are a popular choice among boaters and mechanics alike.

Where can I learn more about Mercury Oil Filters?

PartsVu understands that boaters want to learn how to perform their own Mercury outboard maintenance. From maintaining your Mercury outboard, Mercury sterndrive, and MerCruiser engines, there’s always something new to learn and save money. That’s why PartsVu offers our comprehensive blog, The PartsVu Xchange. 

Read up on the latest developments in boating, as well as search for everything you need to know about Mercury oil system maintenance.

To get you off to a good start, these are some of the most important articles on changing lower unit oil, Mercury 2-stroke performance tips, and much more:

• Mercury 4-Stroke Oil Change - 100-hour Service
• Mercruiser Oil Change In 8 Easy Steps
• Mercury Outboard and Mercruiser Resources Collection
• How to Select the Right Mercury Outboard Parts

What is the difference between a boat oil filter and a automotive oil filter?

Boat oil filters and automotive oil filters have some differences due to the different operating environments in which they are used. Boat engines typically operate at higher RPMs for extended periods, and boats can be exposed to saltwater and other harsh conditions, leading to more wear and tear on the engine. As a result, boat oil filters need to be able to filter out smaller particles and maintain their filtration efficiency for longer periods compared to automotive oil filters. Boat oil filters are also designed to resist corrosion and withstand exposure to saltwater. Additionally, boat oil filters may have a different thread size or shape compared to automotive oil filters, requiring specific filters for each application.

Comparing Sierra to Mercury oil filters - what's better?

Both Sierra and Mercury produce high-quality oil filters for their outboard motors. The choice of which one to use ultimately comes down to personal preference. Some users prefer sierra Mercury oil filters have a larger filtration surface area, which can increase the filter's lifespan and effectiveness. However, others prefer Mercury filters because they are specifically designed for use with Mercury engines and may offer better compatibility and performance. It is important to note that both brands are reputable and reliable and will provide adequate protection for your engine. Ultimately, it is recommended to consult your engine's owner manual to determine the recommended type of filter and brand for your specific outboard model.

What are the risks of purchasing Mercury oil filters on Amazon?

The risks of purchasing Mercury oil filters on Amazon include receiving counterfeit products that are not made to the same standards as genuine Mercury parts. These counterfeit filters may not fit or function properly, leading to potential engine damage and voiding any warranties. Additionally, purchasing from Amazon may result in longer shipping times, limited availability, and poor customer service. For these reasons, it is better to purchase Mercury oil filters from a reputable dealer like PartsVu. PartsVu only sells genuine Mercury parts and Mercury oil filters for outboard, inboard, and sterndrive engines. PartsVU offering fast shipping, easy returns, and expert customer service to ensure that customers receive the right parts for their needs.

What are the Mercury oil filters that end in 205?

There are several Mercury oil filters that end in 205, including the 35-8M0065104, 35-8M0065103, and 35-877761K01 models. These oil filters are compatible with various Mercury outboard engines and are designed to effectively filter out impurities and contaminants from the engine oil.

What are the Mercury oil filters that end in q05?

Mercury oil filters that end in "q05" are high-capacity oil filters designed for use in various Mercury outboard engines. These filters feature a large capacity, allowing them to capture and hold more contaminants than standard filters, resulting in improved engine protection. They are typically used in four-stroke outboards with a horsepower rating of 75-115, Verado outboards, and some MerCruiser sterndrives. Some examples of Mercury oil filters that end in "q05" include the 8M0065104, 8M0065103, and 8M0065108.

What are the options are available for Mercury Quicksilver oil filters for MerCruiser V6?

There are several options available for Mercury Quicksilver oil filters for MerCruiser V6, including the 35-866340Q03, 35-866340Q02, 35-866340K01, and 35-802885Q4. These filters are designed to meet or exceed OEM specifications and provide excellent filtration for your engine. It is important to choose the right filter for your engine based on its make and model, as well as the specific requirements of your boating environment. Consult with a qualified mechanic or refer to your owner's manual to determine the best oil filter for your MerCruiser V6.

Can I used Mercury outboard lower unit oil as a substitute for my outboard engine oil?

No, you should not use Mercury outboard lower unit oil as a substitute for your outboard engine oil. Lower unit oil is designed specifically for lubricating the gears and bearings in the lower unit of the outboard, while engine oil is designed to lubricate the internal components of the engine. These are two separate and distinct applications, and using the wrong type of oil can result in poor engine performance, increased wear and tear, and even engine damage. It's important to always use the correct type of oil specified in your outboard engine's owner's manual.