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Aftermarket Parts

Aftermarket Parts

  • Sierra Filter Kith2O Sep-Ss 3/8 Tall 18-7776-1

    Sierra Filter Kith2O Sep-Ss 3/8 Tall 18-7776-1

    Sierra

    $115.09 $86.49
    Sierra Filter Kith2O Sep-Ss 3/8 Tall 18-7776-1Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...
    Part Number:
    47-77761
    Availability:
    In Stock - Ships same or next business day.
    Type:
    3/8" Stainless Steel
    Filter:
    Tall
    Contains:
    (1) 7845 & (1) 7776
    $115.09 $86.49
  • Sierra Filter Kith2O/10M Al 1/4 Long 18-7983-1

    Sierra Filter Kith2O/10M Al 1/4 Long 18-7983-1

    Sierra

    $52.69 $41.90
    Sierra Filter Kith2O/10M Al 1/4 Long 18-7983-1Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...
    Part Number:
    47-79831
    Availability:
    In Stock - Ships same or next business day.
    Type:
    1/4" Aluminum
    Filter:
    Short
    Contains:
    (1) 7944 & (1) 7853-1
    Replaces:
    Mercury - 35-802893A4 - Q4 - 35-60494A4
    $52.69 $41.90
  • Sierra Filter Kith2O/10M SS 1/4 Long 18-7984-1

    Sierra Filter Kith2O/10M SS 1/4 Long 18-7984-1

    Sierra

    $108.79 $87.71
    Sierra Filter Kith2O/10M SS 1/4 Long 18-7984-1Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...
    Part Number:
    47-79841
    Availability:
    In Stock - Ships same or next business day.
    Type:
    1/4" Stainless Steel
    Filter:
    Tall
    Contains:
    (1) 7945 & (1) 7777
    Replaces:
    Yamaha - MAR-SPRTR-HD-SS
    $108.79 $87.71
  • Sierra Filter Kith2O/10M SS 3/8 Long 18-7985-1

    Sierra Filter Kith2O/10M SS 3/8 Long 18-7985-1

    Sierra

    $128.29 $105.20
    Sierra Filter Kith2O/10M SS 3/8 Long 18-7985-1Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...
    Part Number:
    47-79851
    Availability:
    In Stock - Ships same or next business day.
    Type:
    3/8" Stainless Steel
    Filter:
    Tall
    Contains:
    (1) 7945 & (1) 7776
    $128.29 $105.20
  • Sierra Filter Kith2O/21M Al 1/4 Long 18-7852-1

    Sierra Filter Kith2O/21M Al 1/4 Long 18-7852-1

    Sierra

    $57.49 $46.27
    Sierra Filter Kith2O/21M Al 1/4 Long 18-7852-1Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...
    Part Number:
    47-78521
    Availability:
    In Stock - Ships same or next business day.
    Type:
    1/4" Aluminum
    Filter:
    Tall
    Contains:
    (1) 7845 & (1) 7853-1
    Replaces:
    Yamaha - ABB-SEPAR-AT-OR
    $57.49 $46.27
  • Sierra Filter Kith2O/21M Al 1/4 Short 18-7848-1

    Sierra Filter Kith2O/21M Al 1/4 Short 18-7848-1

    Sierra

    $56.69 $45.33
    Sierra Filter Kith2O/21M Al 1/4 Short 18-7848-1Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...
    Part Number:
    47-78481
    Availability:
    In Stock - Ships same or next business day.
    Type:
    1/4" Aluminum
    Filter:
    Short
    Contains:
    (1) 7844 & (1) 7853-1
    Replaces:
    Mercury - 35-802893A4 - Q4 - 35-60494A4
    $56.69 $45.33
  • Sold Out, please call for ETA.
    Sierra Filter Kt-Fuel W35920On1491445 23-7720

    Sierra Filter Kt-Fuel W35920On1491445 23-7720

    Sierra

    $13.39 $1.30
    Sierra Filter Kt-Fuel W35920On1491445 23-7720
    Part Number:
    47-237720
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Westerbeke #35920
    Onan #149-1445
    Fits:
    Westerbeke: 4.0 BCG(60Hz)/3.0 BCG(50Hz) - 6.5 BCG(60Hz)/4.8 BCG(50Hz) - 6.5 TWG(60Hz)/4.9 TWG(50Hz) -8.0 TWG(60Hz)/6.4 TWG(50Hz) -9.0 BTG(60Hz)/7.0 BTG(50Hz) -11.0 TWG(60Hz)/8.5 TWG(50Hz)
  • Sierra Filter Oil/Sz#16510 05240Brp 18-7903

    Sierra Filter Oil/Sz#16510 05240Brp 18-7903

    Sierra

    $13.89 $11.20
    Sierra Filter Oil/Sz#16510 05240Brp 18-7903Please see manufacturer application guide for complete application references.
    Part Number:
    47-7903
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Johnson Evinrude: 5033102 - 763364
    Suzuki 16510-05240
    $13.89 $11.20
  • Sierra Filter Oil/Sz#16510 82703Brp 18-7896

    Sierra Filter Oil/Sz#16510 82703Brp 18-7896

    Sierra

    $12.19 $10.03
    Sierra Filter Oil/Sz#16510 82703Brp 18-7896Please see manufacturer application guide for complete application references.
    Part Number:
    47-7896
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Johnson/Evinrude: 778886 - 5033539
    Suzuki: 16510-61A20-MHL
    $12.19 $10.03
  • Sierra Filter-Fuel Kohler# 252898 23-7740

    Sierra Filter-Fuel Kohler# 252898 23-7740

    Sierra

    $18.09 $13.70
    Sierra Filter-Fuel Kohler# 252898 23-7740
    Part Number:
    47-237740
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Kohler #252898
    Fits:
    11 CCFOZ (variation 2) - 11.5 CCFOZ (variation 2) - 11EFOZ (variation 2) - 11.5EFOZ (variation 2) - 13EOZ (variation 2) - 13EFOZ (variation 2) - 13.5 CCOZ (variation 2) - 14 CCOZ (variation 2) - 14EOZ (variation 2) - 15 CCFOZ (variation 3) - 15.5EOZ
    $18.09 $13.70
  • Sierra Filter-Fuel Kohler# GM32359 23-7761

    Sierra Filter-Fuel Kohler# GM32359 23-7761

    Sierra

    $12.33
    Sierra Filter-Fuel Kohler# GM32359 23-7761
    Part Number:
    47-237761
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Kohler #GM32359
    Fits:
    7 EFOZD (variation 1) - 8.5 EFOZD (variation 1) -9 EOZD (variation 1) -9EFOZD (variation 1) -10EOZD (variation 1) - 11EFOZD (variation 3) - 11.5EFOZD (variation 3) -13EOZD (variation 3) -13EFOZD (variation 3) -14 EOZD (variation 3) -15.5 EOZD (variat
    $12.33
  • Sierra Filter-Gas OMC 10M Racor S3214 18-7920

    Sierra Filter-Gas OMC 10M Racor S3214 18-7920

    Sierra

    $42.19 $34.96
    Sierra Filter-Gas OMC 10M Racor S3214 18-7920Clear Bowls: Use for outboard and above deck installations.USCG regulations require the use of flame resistant Metal bowls below deck.
    Part Number:
    47-7920
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Spin-on element w/o Bowl
    Replaces:
    Racor S3214 - OMC 771839 - Mercury 35-809099
    $42.19 $34.96
  • Sold Out, please call for ETA.
    Sierra Filter-Gas W-Metal Bowl OMC 10M 18-7943

    Sierra Filter-Gas W-Metal Bowl OMC 10M 18-7943

    Sierra

    $0.00
    Sierra Filter-Gas W-Metal Bowl OMC 10M 18-7943Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. All filters flow @ 90 GPH to feed even the hungriest motor.Clear Bowls: Use for outboard and above deck installations...
    Part Number:
    47-7943
    Availability:
    In Stock - Ships same or next business day.
    Type:
    Kit: Filter & Metal Bowl
    Contains:
    18-7920 - 18-7924
    Replaces:
    OMC Style

Aftermarket Boat Parts & Marine Engine Supplies

Looking for dependable aftermarket boat parts? PowerBoatSupply.com carries a wide selection of aftermarket marine parts, engine supplies, oils, fuel components, steering parts, anodes, tools, and maintenance essentials for boat owners and marine professionals.

Whether you're handling routine service, replacing worn components, or stocking up for the season, our aftermarket parts selection helps keep your boat running smoothly and reliably.

Marine Engine Parts & Maintenance Essentials

Keep your motor protected and performing with key maintenance categories like engine parts, motor oil, marine oil systems and accessories, and lubricants, fluids and sealants.

  • Engine Parts – Replacement components for service and repair
  • Motor Oil – Marine-grade oils for routine maintenance
  • Oil Systems & Accessories – Helpful products for oil changes and upkeep
  • Lubricants, Fluids & Sealants – Protect, seal, and maintain marine systems

Fuel, Steering & Control Parts

Reliable fuel delivery and responsive steering are critical on the water. Browse marine fuel parts and steering and controls to help maintain safer handling, smoother operation, and dependable performance.

  • Fuel Parts – Components for reliable fuel system performance
  • Steering & Controls – Parts that help improve control and handling
  • Engine Instruments – Monitor key systems while underway
  • Engine Tools – Tools for maintenance, repair, and service work

Anodes, Instruments & Service Tools

Small parts can make a big difference in long-term protection and performance. Shop marine anodes, engine instruments, and engine tools to help protect your boat, monitor performance, and complete service work more efficiently.

  • Anodes – Help protect metal components from corrosion
  • Engine Instruments – Gauges and monitoring products for marine engines
  • Engine Tools – Service tools for DIY boaters and marine technicians
  • Maintenance Supplies – Everyday essentials for seasonal upkeep

Yamaha Oil Change Kits & Routine Service Products

Staying ahead of routine service is one of the best ways to protect your investment. PowerBoatSupply.com also carries Yamaha oil change kits and other service products that make maintenance easier and more convenient.

  • Oil Change Kits – Convenient service kits for scheduled maintenance
  • Marine Oils – Protect engines under real boating conditions
  • Sealants & Fluids – Support repairs, installs, and regular service
  • Tools & Accessories – Make maintenance faster and cleaner

Why Buy Aftermarket Marine Parts from PowerBoatSupply.com?

PowerBoatSupply.com helps boat owners find reliable parts and maintenance products without the guesswork. From routine oil service to engine repair, fuel system work, corrosion protection, and steering maintenance, our aftermarket category is built to support the jobs boaters handle every season.

  • Wide selection of aftermarket boat parts and marine supplies
  • Products for DIY boat owners and marine professionals
  • Helpful categories for seasonal service and repairs
  • Fast shipping and dependable support

Shop aftermarket boat parts today and get the engine parts, oils, fuel components, steering supplies, anodes, tools, and maintenance products you need to keep your boat ready for the water.