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Aftermarket Parts

Aftermarket Parts

  • Seachoice Anti-Syphon Valve 1/4Nptx3/8 20991

    Seachoice Anti-Syphon Valve 1/4Nptx3/8 20991

    Seachoice

    $14.85 $12.99
    Seachoice Anti-Syphon Valve 1/4Nptx3/8 20991 Coast Guard industry standards require anti-siphon protection on all gasoline powered boatsThis valve combines anti-syphon protection with a convenient hose barb designMade of corrosion resistant aluminum.
    Part Number:
    50-20991
    Availability:
    In Stock - Ships same or next business day.
    Thread:
    1/4" NPT
    Hose:
    3/8" ID
    $14.85 $12.99
  • Sherwood Pump Pump-Engine-Kohler G910P

    Sherwood Pump Pump-Engine-Kohler G910P

    Sherwood Pump

    $481.39 $349.99
    Sherwood Pump Pump-Engine-Kohler G910P   Impeller Kit: 9000K
    Part Number:
    762-G910P
    Availability:
    In Stock - Ships same or next business day.
    Engine:
    Ford & Kohler
    Pulley:
    w/o Pulley
    Inlet:
    3/8" NPT
    Outlet:
    3/8" NPT
    $481.39 $349.99
  • Sierra Eng Coupler MerCruiser 55 1446 18-2171

    Sierra Eng Coupler MerCruiser 55 1446 18-2171

    Sierra

    $335.59 $255.92
    Sierra Eng Coupler MerCruiser 55 1446 18-2171
    Part Number:
    47-2171
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Replaces: 76850A2 - For all GM engines except MR/ALPHA/BRAVO with "Triangular" - 3-Bolt coupler
    $335.59 $255.92
  • Sierra P Coil OMC 583737/584561 18-5176

    Sierra P Coil OMC 583737/584561 18-5176

    Sierra

    $59.99 $39.99
    Sierra P Coil OMC 583737/584561 18-5176Please see Sierra's application guides for complete application references.
    Part Number:
    47-5176
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Coil Kit: Fits 1979 Evinrude 115HP. Replaces Johnson/Evinrude OB #582366 - 587737 - 584561 - 582106 - 582330
    $59.99 $39.99
  • Centek Muffler-Minimax 3X3 1050300

    Centek Muffler-Minimax 3X3 1050300

    Centek

    $391.99 $289.99
    Centek Muffler-Minimax 3X3 1050300 For use where there is a shortage of space or V Drive applications. For Gas/Diesel fuel type. For above the waterline only.
    Part Number:
    383-1050300
    Availability:
    In Stock - Ships same or next business day.
    Ports:
    3"
    Dia.:
    6.38"
    Length:
    13.75"
    $391.99 $289.99
  • Centek Replacement Filter For Bk-1 8Bf11R

    Centek Replacement Filter For Bk-1 8Bf11R

    Centek

    $101.59 $79.99
    Centek Replacement Filter For Bk-1 8Bf11R Replacement filter cartridge filters bilge water discharge to remove hydrocarbons.
    Part Number:
    383-8BF11R
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Replacement Filter
    Capacity:
    25 GPM
    Fits:
    8BK1
    Length:
    10"
    $101.59 $79.99
  • Martyr Anodes Rud Anode Cmr4 5 Cmr04Al

    Martyr Anodes Rud Anode Cmr4 5 Cmr04Al

    Martyr Anodes

    $35.59 $22.99
    Martyr Anodes Rud Anode Cmr4 5 Cmr04Al Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water
    Part Number:
    194-CMR04AL
    Availability:
    In Stock - Ships same or next business day.
    Size:
    5" dia. x 5/8"
    Material:
    Aluminum
    $35.59 $22.99
  • NGK Spark Plugs 3133 Spark Plug 3133

    NGK Spark Plugs 3133 Spark Plug 3133

    NGK Spark Plugs

    $20.39 $12.99
    NGK Spark Plugs 3133 Spark Plug 3133 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-BPZ8HS10
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    3133
    Pkg.:
    Boxed
    What's in the Box:
    (1) Spark Plug
    $20.39 $12.99
  • Seachoice Adj Fuel Tank Sender-4-24" 15471

    Seachoice Adj Fuel Tank Sender-4-24" 15471

    Seachoice

    $61.21 $43.99
    Seachoice Adj Fuel Tank Sender-4-24" 15471 Can be used for gas or dieselMade of non-ferrous materials and compatible with 35 (full) to 240 (empty) ohm gaugesMounting screws and gasket includedFloat arm can be rotated in 90&deg, intervals to assure...
    Part Number:
    50-15471
    Availability:
    In Stock - Ships same or next business day.
    Tank Depth:
    4" to 24"
    $61.21 $43.99
  • Seachoice Alpha One Gen 2 Kit Mg Freshwater 50-95031

    Seachoice Alpha One Gen 2 Kit Mg Freshwater 50-95031

    Seachoice

    $123.48 $80.41
    Seachoice Alpha One Gen 2 Kit Mg Freshwater 50-95031 Cadmium free, environmentally friendly. • Aluminum: For salt and brackish waterConform to: Mil-Spec A-24779(SH)  • Magnesium: For freshwater onlyConform to: Mil-Spec...
    Part Number:
    50-95031
    Availability:
    In Stock - Ships same or next business day.
    Material:
    Magnesium
    $123.48 $80.41
  • Seachoice Steering Cable Protector 28301

    Seachoice Steering Cable Protector 28301

    Seachoice

    $11.07 $9.99
    Seachoice Steering Cable Protector 28301 Heavy-duty rubber boot to fit over output end of steering cable at engine for complete protection from elements and preventing lubrication from being washed awayFits all standard steering cables including Morse,...
    Part Number:
    50-28301
    Availability:
    In Stock - Ships same or next business day.
    $11.07 $9.99
  • Seastar Orb Fitting-Straight 2Pk Hf6009

    Seastar Orb Fitting-Straight 2Pk Hf6009

    Seastar

    $40.79 $32.99
    Seastar Orb Fitting-Straight 2Pk Hf6009 These fittings fit updated Seastar cylinders and all helm pump to use O-Ring (ORB) type fittings. Before the update all Seastar Solutions helms used NPT fittings. These 316 stainless steel fittings will simplify...
    Part Number:
    1-HF6009
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Straight ORB fitting
    Fits:
    Helms
    Bag:
    2
    $40.79 $32.99

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.