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Fuel Filters

      Product Listing

      • Mercury 35-802893T Water Separating Fuel Filter
        $18.59
        $15.49

        Mercury 35-802893T Water Separating Fuel Filter This OEM Fuel Filter is designed to separate water and other impurities from your fuel with its unique filtration system. This filtration system screens particles smaller than 1/1000th of an inch from your...

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      • Sierra 18-7845 Mercury MerCruiser Fuel Filter
        $14.99
        $12.49

        Sierra 18-7845 Fuel Separating Fuel Filter for Sterndrive and Inboard Engines Sierra 18-7845 is a replacement fuel filter for sterndrive and inboard engines including MerCruiser, Mercury, and Yamaha. Sierra canister fuel filters are designed to be an...

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      • Quicksilver 35-802893Q01 Water Separating Fuel Filter
        $16.99
        $15.49

        Quicksilver 35-802893Q01 Water Separating Fuel Filter  This 25 micron Mercury filter separates water and other impurities from the fuel to increase engine performance. Fuel contamination can result in poor engine performance, stalling, and...

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      • Sierra 18-7866 Fuel Filter Replaces MAR-FUELF-IL-TR
        $22.99
        $16.99

        Sierra 18-7866 Fuel Water Separator Filter for Yamaha Outboards Sierra replacement fuel water separator for use with Yamaha engines. Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline. Sierra's 10 micron filters are...

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      • Sierra 18-7844 Fuel Filter Replaces 35-802893Q01
        $14.99
        $12.49

        Sierra 18-7844 Water Separating Fuel Filter for Sterndrives and Outboards Sierra replacement water separating fuel filter for use with Mercury and MerCruiser engines. Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline...

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      • Sierra 18-7789 Fuel Filter
        $11.99
        $9.49

        Sierra 18-7789 21 Micron Water Separating Fuel Filter for Volvo, OMC Cobra EFI Sierra high quality replacement Water Separating Fuel Filters are designed to be direct replacements of OEM filters. This fuel filter is specifically designed for the marine...

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      • Mercury 18458T-4 Water Separating Fuel Filter Kit V-6 OB Image
        $35.39
        $29.49

        Mercury - Mercruiser 35-18458T-4 Water Separating Fuel Filter Kit V-6 OB Keep your Mercury or Mariner V6 EFI/DFI outboard running smoothly with the Mercury 18458T4 Water-Separating Fuel Filter with Blue Sensor. Designed for 1996 and newer two-stroke...

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      • Sierra 18-7846 Fuel Filter Replaces 502905
        $15.49
        $11.99

        Sierra 18-7846 21 Micron Fuel Water Separator Filter Sierra high quality replacement Water Separating Fuel Filters are designed to be direct replacements of OEM filters. This fuel filter is specifically designed for the marine environment and today's...

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      • Quicksilver 35-879885Q In-Line Fuel Filter
        $17.39
        $14.49

        Quicksilver 35-879885Q In-Line Fuel Filter This under-cowl inline fuel filter offers essential protection by removing fuel-borne contaminants before they reach your engine. With a translucent body for easy inspection, it fits a wide range of Mercury and...

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      • Mercury 35-8M0106635 Water Separating Fuel Filter w/ Packing
        $65.99
        $54.99

        Mercury 35-8M0106635 Water Separating Fuel Filter Genuine OEM replacement Mercury 35-8M0106635 Water Separating Fuel Filter. Mercury fuel filters are constructed of the highest quality materials and are made specifically for marine applications. This...

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      • Mercury 35-879885K In-Line Fuel Filter
        $18.59
        $15.49

        Mercury 35-879885K In-Line Fuel Filter Genuine OEM Mercury replacement in-line fuel filter. Fits 25-40 HP EFI 4-Stroke Outboards 4-Cylinder (996cc) 40/50/60 HP EFI 4-Stroke Outboards 75-115 HP 4-Stroke Outboards (s/n 1B366823 and up) 135-300 HP...

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      • SIE-18-7718
        $15.99
        $11.49

        Sierra 18-7718 Mercury Fuel Filter Sierra Inline Fuel Filters are direct replacement OEM filters, making them easy to install. All Sierra Inline fuel filters are tested and approved for ethanol-based fuels and meet the demands of today's high...

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      • Sierra 18-7830 Fuel Filter Replaces 35-81629K2
        $9.49
        $7.99

        Sierra 18-7830 Inline Fuel Filter Sierra high-quality replacement engine parts are designed to meet OEM specifications. Sierra Inline fuel filters are tested and approved for ethanol-based fuels and are designed to meet the demands of today's high...

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      • Sierra 18-7981 Fuel Filter Replaces 35-8M0060041
        $33.49
        $23.99

        Mercury Outboard Fuel Filter Element by Sierra Fits the new Verado outboard replaceable cartridge fuel filter and the newer 1.5L & 3.0L DFI outboards that utilize a vapor separator with a top screw-in type filter. Replaces: Mercury...

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      • Sierra 18-7977-1 Fuel Filter Replaces 35-8M0093688
        $60.99
        $43.99

        Sierra 18-7977-1 MerCruiser Fuel Filter Sierra replacement fuel filters are manufactured to meet or exceed OEM requirements. Features: Micron rating: 20 Includes 0-Rings Supersedes: 18-7977  It is recommended to change this filter and...

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      • Quicksilver 35-879884T Fuel Filter
        $19.19
        $15.99

        Quicksilver 35-879884T Fuel Filter The Quicksilver 35-879884T is an OEM-quality under-cowl fuel filter designed for Mercury 30HP 3-cylinder and 40–60HP 4-cylinder EFI FourStroke outboards (serial #0T409000 and above). It features a 20-micron...

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      • Sierra 18-7721 Fuel Filter Replaces 35-864572
        $57.99
        $41.99

        Sierra 18-7721 Mercruiser Fuel Filter Replaces 35-864572 Sierra replacement fuel filters are designed to meet OEM specifications. All Sierra Fuel Filters not only protect your engine, but are also over 90% efficient at removing engine damaging 10-micron...

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      Marine Fuel Filters

      Boat fuel filters are an essential part of your vessel’s marine fuel system. These filters remove dirt, debris, and water from fuel before it reaches the engine, helping prevent clogs, corrosion, and engine performance problems.

      Without proper filtration, contaminants can enter the fuel system and damage sensitive engine components. Regularly replacing marine fuel filters helps maintain smooth engine operation and protects your investment.

      Marine Fuel Water Separators

      Many modern marine fuel filters include a fuel water separator. These systems trap water that enters the fuel tank through condensation or contaminated fuel. Removing water from fuel is critical because water can cause corrosion and poor engine performance.

      Fuel water separators are commonly used with permanent boat fuel tanks and are often installed between the fuel tank and the engine to provide an additional layer of protection.

      Types of Boat Fuel Filters

      Inline Fuel Filters

      Inline marine fuel filters are installed directly within the fuel line and provide basic filtration for small debris and contaminants.

      Spin-On Fuel Water Separators

      Spin-on fuel filters are commonly used in marine applications and combine filtration with water separation. These filters are easy to replace and offer excellent protection for outboards, inboards, and sterndrive engines.

      Why Fuel Filter Maintenance Matters

      Fuel system maintenance is critical for preventing engine trouble on the water. Over time, fuel filters can become clogged with debris or contaminated fuel, restricting fuel flow and reducing engine performance.

      Replacing worn filters helps keep fuel moving freely through boat fuel lines and hoses and ensures clean fuel reaches the engine.

      Shop Marine Fuel Filters at Wholesale Marine

      Wholesale Marine carries a wide selection of reliable boat fuel filters and marine fuel water separators designed to protect your engine and maintain proper fuel delivery. Whether you need a replacement inline filter or a complete fuel water separator system, you’ll find the marine fuel filtration components needed to keep your boat running smoothly.

      Boat Fuel Filter FAQs

      What does a marine fuel filter do?

      A marine fuel filter removes dirt, debris, and water from fuel before it reaches the engine. This helps protect sensitive engine components and ensures reliable performance.

      How often should boat fuel filters be replaced?

      Most marine fuel filters should be inspected each boating season and replaced at least once per year or according to the engine manufacturer’s maintenance schedule.

      What is a fuel water separator?

      A fuel water separator is a type of fuel filter designed to remove water from fuel before it reaches the engine. Water separators are commonly used in marine fuel systems to prevent corrosion and fuel contamination.

      Can a clogged fuel filter cause engine problems?

      Yes. A clogged fuel filter can restrict fuel flow to the engine, causing hard starting, loss of power, sputtering, or stalling.

      Where is a boat fuel filter located?

      Fuel filters are typically installed between the fuel tank and the engine along the fuel line. Many boats use a primary water separating filter near the tank and a secondary filter near the engine.