null

FREE SHIPPING OVER $99

BEST PRICE GUARANTEED

EARN POWERBOAT REWARDS

SUPPORT M-F 9-5 EST: 856-232-6969

Buy a Mercury Outboard → Get 8-Year Platinum Warranty for $1! ⚡ Offer Ends Soon! — Shop Now ›

FourStroke Outboard Maintenance

FourStroke Outboard Maintenance

Find Your Maintenance Parts

Clear Selection

LOOKING FOR REPLACEMENT PARTS?

  • OEM Mercury Mercruiser High-Performance SAE90 Gear Lube 92-858064K01 92-858065K01 92-8M0222063 92-8M0222071

    OEM Mercury Mercruiser High-Performance SAE90 Gear Lube 92-858064K01 92-858065K01 92-8M0222063 92-8M0222071

    Mercury Marine / Quicksilver

    $13.77 $9.86
    OEM Mercury High-Performance SAE90 Gear Lube Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for sterndrive and outboard lower units, this High Performance SAE 90...
    Part Number:
    NW-MGSAE90HP
    Availability:
    In Stock - Ships same or next business day.
    Grade:
    SAE90
    $13.77 $9.86
  • OEM Mercury MerCruiser Enamel Spray Paint - Phantom Black 92-8028781

    OEM Mercury MerCruiser Enamel Spray Paint - Phantom Black 92-8028781

    Mercury Marine / Quicksilver

    $19.99 $16.99
    OEM Mercury Enamel Spray Paint - Phantom Black 92-8028781 Can of glossy black enamel paint to match black Mercury Outboards or MerCruiser Stern Drives and Engines. Classic black color to cover worn or scratched surfaces.  Phantom Black Paint used...
    Part Number:
    710-92-8028781
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Phantom Black Enamel
    $19.99 $16.99
  • OEM MerCruiser Gc Drain Screw Wash 26-830749 8M0204693

    OEM MerCruiser Gc Drain Screw Wash 26-830749 8M0204693

    Mercury Marine / Quicksilver

    $5.19 $4.69
    MerCruiser Gc Drain Screw Wash 26-830749 SS to 8M0204693 Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions provided via Mercury may not always be accurateAll of our Mercury parts are sold and priced EACH
    Part Number:
    710-26-8M0204693
    Availability:
    In Stock - Ships same or next business day.
    Fits:
    All MerCruiser and most Merc/Mariner outboards except those of Japanese origin. Yellow rubber coated SS.
    $5.19 $4.69
  • OEM Mercury Marine Quickare Gas Fuel Treatment Additive 12oz - 92-8M0047930

    OEM Mercury Marine Quickare Gas Fuel Treatment Additive 12oz - 92-8M0047930

    Mercury Marine / Quicksilver

    $19.99 $16.99
    Mercury Quickare Fuel Treatment Additive 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...
    Part Number:
    710-92-8M0047930
    Availability:
    In Stock - Ships same or next business day.
    $19.99 $16.99
  • Mercury Marine Four Stroke O/B Oil Filter 35-8M0162829

    Mercury Marine Four Stroke O/B Oil Filter 35-8M0162829

    Mercury Marine / Quicksilver

    $15.49 $13.49
    High-quality Mercury outboard filters and Mercury FourStroke Outboard Oil work together to provide the ultimate protection for your engine.   This oil filter is for the following applications: Mercury/Mariner 25 HP FourStroke (Carb MY2006...
    Part Number:
    710-35-8M0162829
    Availability:
    Same Or Next Business Day
    $15.49 $13.49
  • OEM Mercury 25W40 Synthetic Blend Oil 8M0078629 8M0078630

    OEM Mercury 25W40 Synthetic Blend Oil 8M0078629 8M0078630

    Mercury Marine / Quicksilver

    $19.99 $16.99
    Synthetic blend four stroke oil is for use in all four stroke outboard, stern drive and inboard marine engines. It is SAE 25W40 weight oil. Provides outstanding wear and corrosion protection to help extend engine life. Meets or exceeds all marine engine...
    Part Number:
    NW-MER25W40SYN
    Availability:
    Same Or Next Business Day
    Weight:
    25W-40
    Grade:
    Synthetic
    $19.99 $16.99
  • OEM Mercury 10W30 Marine Engine Oil 8M0078626 8M0078625

    OEM Mercury 10W30 Marine Engine Oil 8M0078626 8M0078625

    Mercury Marine / Quicksilver

    $14.99 $12.64
    Four stroke mineral base oil 8M0078626 is recommended for use in all four stroke marine engines. It is SAE 10W30 weight oil. Exceeds all marine engine manufacturer's warranty requirements and recommendations including FC-W and FC-W catalyst compatible...
    Part Number:
    NW-MER10W30
    Availability:
    Same Or Next Business Day
    Weight:
    10W-30
    Grade:
    Standard
    $14.99 $12.64
  • NGK Spark Plugs 7558 Spark Plug ZFR5F Mercury 8m0204728

    NGK Spark Plugs 7558 Spark Plug ZFR5F Mercury 8m0204728

    NGK Spark Plugs

    $8.09 $4.99
    NGK Spark Plugs 7558 Spark Plug V-Power 7558 Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life. •?Triple gasket...
    Part Number:
    41-ZFR5F
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    7558
    What's in the Box:
    (1) Spark Plug
    $8.09 $4.99
  • OEM Mercury 10W30 Synthetic Blend  Oil 8M0142141 8M0142151

    OEM Mercury 10W30 Synthetic Blend Oil 8M0142141 8M0142151

    Mercury Marine / Quicksilver

    $19.99 $16.99
    Synthetic Blend 4 Stroke 10W-30 Marine Oil includes all the features and benefits of the 10W-30 Mineral Plus.  Advanced corrosion inhibitors that outperform FC-W standards. Camshaft wear protection compared to other marine oils. Protection in...
    Part Number:
    NW-MERS10W30
    Availability:
    Same Or Next Business Day
    Weight:
    10W-30
    Grade:
    Synthetic
    $19.99 $16.99
  • OEM Quicksilver Premium 80W90 Gear Lube

    OEM Quicksilver Premium 80W90 Gear Lube

    Mercury Marine / Quicksilver

    $11.49 $8.99
    OEM Quicksilver Premium 80W90 Gear Lube Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for outboard applications below 75 HP, this premium 80W-90 gear lube has...
    Part Number:
    NW-QG80W90P
    Availability:
    In Stock - Ships same or next business day.
    Grade:
    80W-90
    $11.49 $8.99
  • OEM Mercury MerCruiser Four Stroke Engine Oil 25W40 8M0078628 8m0078627

    OEM Mercury MerCruiser Four Stroke Engine Oil 25W40 8M0078628 8m0078627

    Mercury Marine / Quicksilver

    $18.99 $15.00
    Four stroke marine engine oil is recommended for use in all four stroke outboard, stern drive and inboard engines. It is SAE 25W-40 weight oil. Provides superior wear and corrosion protection to help extend engine life. Maintains peak engine performance...
    Part Number:
    NW-MER25W40
    Availability:
    Same Or Next Business Day
    Weight:
    25W-40
    Grade:
    Standard
    $18.99 $15.00
  • Mercury Marine 10W30 Full Synthetic Oil Four Stroke 8M0173223 8M0173224

    Mercury Marine 10W30 Full Synthetic Oil Four Stroke 8M0173223 8M0173224

    Mercury Marine / Quicksilver

    $24.99 $19.99
    All-New Mercury 10W-30 Full Synthetic 4-Stroke Marine Engine Oil. Provides the best wear and corrosion protection when operating engine at maximum output and high temperatures for extended periods of time.  45% more dispersant, 24% more detergent...
    Part Number:
    NW-MERFS10W30
    Availability:
    Same Or Next Business Day
    Weight:
    10W-30
    Grade:
    Full Synthetic
    $24.99 $19.99
  • OEM Mercury Marine SAE 80W90 Premium Gear Lube 802844K01 858058K01

    OEM Mercury Marine SAE 80W90 Premium Gear Lube 802844K01 858058K01

    Mercury Marine / Quicksilver

    $11.99 $8.99
    OEM Mercury Premium 80W90 Gear Lube Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for outboard applications below 75 HP, this premium 80W-90 gear lube has been...
    Part Number:
    NW-MG80W90P
    Availability:
    In Stock - Ships same or next business day.
    Grade:
    80W-90
    $11.99 $8.99
  • OEM Quicksilver/Mercury Sealing Washer 8M0082880

    OEM Quicksilver/Mercury Sealing Washer 8M0082880

    Mercury Marine / Quicksilver

    $5.89 $5.14
    OEM Quicksilver/Mercury Sealing Washer 8M0082880 Gearcase seal (washer) kit 8M0082880 is for use on select 5 hp Mercury propane fueled outboards (s/n:0R936270 and above), 8/9.9 hp 4-stroke outboards (s/n:0R008146 and above), 15 hp through 20 hp Mercury...
    Part Number:
    710-8M0082880
    Availability:
    In Stock - Ships same or next business day.
    Fits:
    8 mm gearcase
    Pack:
    3
    $5.89 $5.14

Mercury FourStroke Outboard Maintenance Parts

When it comes to keeping your Mercury FourStroke outboard motor in top shape, regular maintenance is essential. PowerBoatSupply.com offers a range of premium products designed to keep these engines running smoothly, from oil and filters to spark plugs and more. Each product meets the rigorous demands of boaters and mechanics for reliable performance on the water.

Key Features at a Glance

  • OEM-Approved Products: Built to meet Mercury’s standards for quality and compatibility.
  • Wide Range of Maintenance Parts: From oil filters and gear lube to complete maintenance kits for routine servicing.
  • Ease of Use: Designed for easy installation, whether you’re replacing an oil filter or performing a full tune-up.
  • Performance Enhancements: Authentic Mercury parts help maintain fuel efficiency, performance, and engine longevity.

From prolonging the life of your motor to preventing costly repairs, the right FourStroke outboard maintenance parts make all the difference.

What Maintenance Does a FourStroke Outboard Need?

Routine maintenance tasks include oil and filter changes, spark plug replacements, and keeping the cooling system clean. Following the Mercury FourStroke maintenance schedule is crucial for preventing wear and maximizing fuel efficiency.

For example, replacing your oil filter regularly removes contaminants that can damage your engine. Using the recommended Mercury outboard oil and filters ensures clean, efficient operation. Inspecting the gear lube and propeller shaft also helps protect the drive system against corrosion and premature wear.

How Often Should I Change the Oil in a FourStroke Outboard?

According to Mercury’s schedule, oil changes should occur at least once a year or every 100 hours of operation—whichever comes first. In extreme conditions, such as saltwater use or prolonged high-speed operation, more frequent changes may be required.

Changing the oil involves draining the old oil, replacing the filter, and refilling with fresh oil. Always use products that meet your motor’s specifications for the best results.

Regular oil changes will:

  • Prevent engine wear
  • Promote smoother performance
  • Improve fuel efficiency

What FourStroke Outboard Parts Need to Be Replaced First?

Some parts wear out faster and should be replaced sooner. Commonly replaced Mercury FourStroke outboard parts include:

  • Oil and Filters: Replace every 100 hours to keep the engine clean and protected.
  • Spark Plugs: Worn plugs can cause misfires and poor performance. Replace if starting becomes difficult.
  • Water Pump Impeller: Prevent overheating by checking and replacing the impeller regularly.
  • Gear Lube: Protects the lower unit and should be checked every season or before long outings.

Using OEM-certified parts is critical for long-term engine health. Our FourStroke outboard maintenance parts meet Mercury’s exacting standards for durability and reliability.

Choose PowerBoatSupply.com for All Your FourStroke Maintenance Needs

Finding the right tools for FourStroke outboard maintenance is easy with PowerBoatSupply.com. Whether you need complete maintenance kits or specialty items like Mercury outboard paint, we have the products to keep your engine in peak condition.

Don’t wait until a minor issue becomes a major repair. Shop our wide selection of products for FourStroke outboard motors and keep your engine running smoothly for seasons to come. Looking for maintenance for other Mercury outboards? We have you covered with a full range of high-quality products.