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FourStroke Outboard Maintenance

FourStroke Outboard Maintenance

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  • 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 $8.47
    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 $8.47
  • OEM Mercury MerCruiser Enamel Spray Paint - Phantom Black 92-8028781

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

    Mercury Marine / Quicksilver

    $17.99 $13.95
    Mercury Enamel Spray Paint - Phantom Black 92-802878 1 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 on: ...
    Part Number:
    710-92-802878 1
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Phantom Black Enamel
    $17.99 $13.95
  • OEM MerCruiser Gc Drain Screw Wash 26-830749 8M0204693

    OEM MerCruiser Gc Drain Screw Wash 26-830749 8M0204693

    Mercury Marine / Quicksilver

    $4.90 $3.55
    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.
    $4.90 $3.55
  • Mercury Marine Four Stroke O/B Oil Filter 35-8M0162829

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

    Mercury Marine / Quicksilver

    $13.90 $9.99
    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
    $13.90 $9.99
  • OEM Mercury 25W40 Synthetic Blend Oil 8M0078629 8M0078630

    OEM Mercury 25W40 Synthetic Blend Oil 8M0078629 8M0078630

    Mercury Marine / Quicksilver

    $18.27 $13.70
    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
    $18.27 $13.70
  • OEM Mercury 10W30 Marine Engine Oil 8M0078626 8M0078625

    OEM Mercury 10W30 Marine Engine Oil 8M0078626 8M0078625

    Mercury Marine / Quicksilver

    $13.52 $10.77
    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
    $13.52 $10.77
  • OEM Quicksilver Premium 80W90 Gear Lube

    OEM Quicksilver Premium 80W90 Gear Lube

    Mercury Marine / Quicksilver

    $11.49 $6.26
    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 $6.26
  • OEM Mercury Premium 80W90 Gear Lube

    OEM Mercury Premium 80W90 Gear Lube

    Mercury Marine / Quicksilver

    $10.18 $6.26
    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
    $10.18 $6.26
  • OEM Mercury MerCruiser Four Stroke Engine Oil 25W40 8M0078628 8m0078627

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

    Mercury Marine / Quicksilver

    $17.01 $12.93
    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
    $17.01 $12.93
  • NGK Spark Plugs 7558 Spark Plug ZFR5F Mercury 8m0204728

    NGK Spark Plugs 7558 Spark Plug ZFR5F Mercury 8m0204728

    NGK Spark Plugs

    $6.49 $3.00
    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 sealing...
    Part Number:
    41-ZFR5F
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    7558
    $6.49 $3.00
  • OEM Mercury 10W30 Synthetic Blend  Oil 8M0142141 8M0142151

    OEM Mercury 10W30 Synthetic Blend Oil 8M0142141 8M0142151

    Mercury Marine / Quicksilver

    $17.40 $13.16
    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
    $17.40 $13.16
  • OEM Mercury Marine  4-Stroke O/B Oil Filter 35-877761K01

    OEM Mercury Marine 4-Stroke O/B Oil Filter 35-877761K01

    Mercury Marine / Quicksilver

    $17.90 $12.99
    High-quality Mercury Outboard Filters and Mercury 4-Stroke Outboard Oil work together to provide the ultimate protection for your engine.  Unique filtration system screens particles smaller than 1/1000th of an inch to keep your oil cleaner longer...
    Part Number:
    710-35-877761K01
    Availability:
    In Stock - Ships same or next business day.
    $17.90 $12.99
  • OEM Quicksilver/Mercury Sealing Washer 8M0082880

    OEM Quicksilver/Mercury Sealing Washer 8M0082880

    Mercury Marine / Quicksilver

    $5.90 $3.99
    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
    $5.90 $3.99
  • OEM Mercury 75/90/115 4-Stroke Oil Change Kit SAE 10W-30 8M0107510

    OEM Mercury 75/90/115 4-Stroke Oil Change Kit SAE 10W-30 8M0107510

    Mercury Marine / Quicksilver

    $85.69 $73.64
    For use in all 4-stroke marine engines.  New formula 4-stroke oils are Mercury Engineering approved for all marine 4-stroke outboard applications.  The new formula exceeds all marine industry 4-stroke oil requirements, including FC-W and...
    Part Number:
    710-8M0107510
    Availability:
    In Stock - Ships same or next business day.
    Weight:
    10W-30
    Grade:
    Standard
    Engine:
    75/90/115 HP FourStroke EFI
    $85.69 $73.64
  • Mercury Marine 10W30 Full Synthetic Oil Four Stroke 8M0173223 8M0173224

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

    Mercury Marine / Quicksilver

    $22.04 $15.99
    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
    $22.04 $15.99
  • Mercury Marine FourStroke Outboard Oil Filter 35-8M0162831

    Mercury Marine FourStroke Outboard Oil Filter 35-8M0162831

    Mercury Marine / Quicksilver

    $16.70 $11.99
    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 8 HP FourStroke Outboards (BEL...
    Part Number:
    710-35-8M0162831
    Availability:
    In Stock - Ships same or next business day.
    $16.70 $11.99

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 specifically designed to keep these engines running smoothly, from oil and filters to spark plugs and more. These items are crafted to meet the rigorous demands of boaters and mechanics for reliable performance on the water.  

Key Features at a Glance: 

  • OEM-Approved Products: Each item is built to meet Mercury’s standards for quality and compatibility. 
  • Wide Range of Maintenance Parts: Everything from oil filters and gear lube to complete maintenance kits for routine servicing. 
  • Ease of Use: These products are designed for easy installation, whether you’re replacing your motor's oil filter or performing a full tune-up. 
  • Performance Enhancements: Using authentic Mercury parts helps maintain optimal 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? 

Want to know how to do maintenance on a FourStroke outboard motor? Routine maintenance tasks include oil and filter changes, replacing spark plugs, and keeping the cooling system clean. Following the Mercury FourStroke maintenance schedule is crucial for preventing engine wear and tear, while also maximizing fuel efficiency. 

For example, replacing your oil filter regularly helps remove contaminants and debris that could cause engine damage. Using the recommended Mercury outboard oil and filters guarantees your engine runs cleanly and at peak efficiency. Also, inspecting the gear lube and propeller shaft protects your motor’s drive system against corrosion and premature wear.  

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

According to Mercury’s maintenance schedule, oil changes should happen at least once a year or every 100 hours of operation, whichever comes first. However, in extreme conditions—such as boating in saltwater or when running at high speeds for long periods—you may need to change it more frequently. 

The process involves draining the old oil, replacing the filter, and refilling with fresh oil. This is where quality products come in handy. When choosing oil filters and oils, be sure to use products that match your motor’s specifications for the best results.  

Changing the oil at regular intervals will: 

  • Prevent engine wear 
  • Promote smoother performance 
  • Help with fuel efficiency 

What FourStroke Outboard Parts Need to Be Replaced First? 

Some parts of a Mercury FourStroke motor wear out faster than others and will need to be replaced sooner. Commonly, boat owners will first replace the following:

  • Oil and Filters: Your motor's lifeblood, these should be replaced every 100 hours. 
  • Spark Plugs: Worn-out plugs can cause misfires and poor engine performance. These should be checked and replaced if necessary, especially if you notice difficulty starting the motor. 
  • Water Pump Impeller: If your water pump fails, your engine could overheat. Checking and replacing the impeller regularly helps prevent that. 
  • Gear Lube: This protects your motor’s lower unit and should be checked every season or before long outings. 

Using OEM-certified parts is critical for your engine’s long-term health. Our FourStroke outboard maintenance parts meet Mercury’s exacting standards, which means you’re getting the same durability and reliability as the parts that came with your motor originally. 

Choose PowerBoatSupply.com for All Your FourStroke Maintenance Needs 

Finding the right tools for FourStroke outboard maintenance is easy with PowerBoatSupply.com. Whether you’re looking for outboard maintenance kits for comprehensive servicing or specialty items like Mercury outboard paint, we have the products you need 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 outboard motors? We have you covered with a full range of high-quality products.