FREE SHIPPING OVER $99

BEST PRICE GUARANTEED

EARN POWERBOAT REWARDS

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

Aftermarket Parts

Aftermarket Parts

  • Sierra Filter-Oil GM L4-6 & V8 Short 18-7824-2
    Add to Cart

    Sierra Filter-Oil GM L4-6 & V8 Short 18-7824-2

    Sierra

    $11.39 $9.99
    Sierra Filter-Oil GM L4-6 & V8 Short 18-7824-2Sierra high efficiency filters meet OEM specifications for marine use. Epoxy coated inside for corrosion resistance.
    Part Number:
    47-78242
    Availability:
    In Stock - Ships same or next business day.
    Type:
    Short
    Application:
    GM style filter - for L4-6 & V8
    OEM #:
    Chris-Craft 16.81-08746 - Crusader 201104 - Indmar 50-1001 - Mercruiser 35-802885Q - 32716 - 866340Q02 - 866340K01 - OMC 173232 - 778864. Pleasurecraft R077002 - Volvo Penta 835440-9 - Yamaha YSC-10231-20-0C
    $11.39 $9.99
    Add to Cart
  • Quicksilver 5W-30 Full Synthetic TDI Diesel Engine Oil Gallon 8M0069602
    Add to Cart

    Quicksilver 5W-30 Full Synthetic TDI Diesel Engine Oil Gallon 8M0069602

    Mercury Marine / Quicksilver

    $84.99 $75.99
    Optimizes engine performance in marine applications because this stable and stay-in-grade formula resists thermal breakdown and oxidation under extreme conditions. Protects diesel emissions systems such as Diesel Particulate Filter (DPF) and Selective...
    Part Number:
    710-92-8M0069602
    Availability:
    In Stock - Ships same or next business day.
    Weight:
    5W30
    Grade:
    Full Synthetic
    $84.99 $75.99
    Add to Cart
  • Attwood Marine Fuel Tank Vent 90 66032-3
    Add to Cart

    Attwood Marine Fuel Tank Vent 90 66032-3

    Attwood Marine

    $59.49 $30.17
    Attwood Marine Fuel Tank Vent 90 66032-3316 Stainless Steel. On the exterior, they have a smooth edge over the competition. There is no protruding cap to cause damage- or be damaged by- hull bumps or scrapes. Cap unscrews with hex head wrench for easy...
    Part Number:
    23-660323
    Availability:
    In Stock - Ships same or next business day.
    Type:
    90 Deg -
    Hose:
    5/8" I.D.
    Max Hull Thickness:
    7/8"
    Hole:
    1-3/8"
    $59.49 $30.17
    Add to Cart
  • Martyr Anodes 5 Zinc Rudder Anode Cmr04
    Add to Cart

    Martyr Anodes 5 Zinc Rudder Anode Cmr04

    Martyr Anodes

    $43.99 $22.99
    Martyr Anodes 5 Zinc Rudder Anode Cmr04 Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water
    Part Number:
    194-CMR04
    Availability:
    In Stock - Ships same or next business day.
    Size:
    5" dia. x 5/8"
    Material:
    Zinc
    $43.99 $22.99
    Add to Cart
  • Sierra Marine Engine Circ Pump-GM 7.4L & 8.2 18-3577-1 18-3577-2
    Add to Cart

    Sierra Marine Engine Circ Pump-GM 7.4L & 8.2 18-3577-1 18-3577-2

    Sierra

    $304.19 $189.99
    Sierra Engine Circ Pump-GM 7.4L & 8.2 18-3577-2
    Part Number:
    47-35772
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Big block GM engines - Bi-directional. Gasket 18-0903 included
    Replaces:
    Crusader 30103 - Pleasurecraft RA057019 - Mercury 17670/67859/811573/8504541 - OMC 983296/986074/987447/3854118 - GM 6269358 - Volvo 856609/3855991
    $304.19 $189.99
    Add to Cart
  • Sierra Power Steering-Trim Fluid Qt 18-9751-2
    Add to Cart

    Sierra Power Steering-Trim Fluid Qt 18-9751-2

    Sierra

    $13.99
    Sierra Power Steering-Trim Fluid Qt 18-9751-2Anti-foam additives assure uniform flow with reduced air contamination in hydraulic systemsDesigned for heavy duty use at high operating pressures in applications subject to varied temperature rangesProvides...
    Part Number:
    47-97512
    Availability:
    In Stock - Ships same or next business day.
    Size:
    Quart
    $13.99
    Add to Cart
  • Seastar Tube Nut F/3/8 Nylon & Cp(6) Hf5526
    Add to Cart

    Seastar Tube Nut F/3/8 Nylon & Cp(6) Hf5526

    Seastar

    $42.39 $29.99
    Seastar Tube Nut F/3/8 Nylon & Cp(6) Hf5526 All Older Style SeaStar manual hydraulic steering systems. These are 3/8" compression fittings which utilize a 9/16"-24 extra fine thread. (Seastar Solutions New Updated cylinders with part numbers ending...
    Part Number:
    1-HF5526
    Availability:
    In Stock - Ships same or next business day.
    Type:
    Tube Nut 3/8"
    Material:
    Brass
    Bag:
    6
    $42.39 $29.99
    Add to Cart
  • Martyr Anodes Rudder Anode Set 3 3/4" Dia. Cmr03S
    Add to Cart

    Martyr Anodes Rudder Anode Set 3 3/4" Dia. Cmr03S

    Martyr Anodes

    $18.59 $15.99
    Martyr Anodes Rudder Anode Set 3 3/4" Dia. Cmr03S Streamlined rudder anodes include combination fasteners.Slotted hardware. Zinc for salt water.
    Part Number:
    194-CMR03S
    Availability:
    In Stock - Ships same or next business day.
    Size:
    3-3/4" dia.
    Material:
    Zinc
    $18.59 $15.99
    Add to Cart
  • Sierra Filter-Water Separator 10M Long 18-7945
    Add to Cart

    Sierra Filter-Water Separator 10M Long 18-7945

    Sierra

    $11.89 $10.49
    Sierra Filter-Water Separator 10M Long 18-7945Sierra 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:
    47-7945
    Availability:
    In Stock - Ships same or next business day.
    Type:
    Water Separating Spin-On - 4.35" for Yamaha - Suzuki - Honda & others
    Replaces:
    Yamaha ABB-FUELF-IL-TR
    $11.89 $10.49
    Add to Cart
  • Uflex Mach-0 Universal Control Cable 33C
    Choose Options

    Uflex Mach-0 Universal Control Cable 33C

    Uflex

    $39.99
    Uflex Mach-0 Universal Control Cable 33C Universal 33C StyleHeavy duty 18 laywire conduit for long life & high efficiency for smooth operation and reduced bend radius. Ideal for long complex cable runs. High resistance blue outer jacket protects...
    Part Number:
    NW-216M033C
    Availability:
    In Stock - Ships same or next business day.
    $39.99
    Choose Options
  • NGK Spark Plugs 3249 Spark Plug 3249
    Add to Cart

    NGK Spark Plugs 3249 Spark Plug 3249

    NGK Spark Plugs

    $12.09 $6.73
    NGK Spark Plugs 3249 Spark Plug 3249   Racing plugs feature a center electrode with a V-groove and a thicker ceramic shell for the high-heat applications in racing engines. Special center electrode designs and configurations to ensure...
    Part Number:
    41-R56738
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    3249
    Pack:
    4
    What's in the Box:
    (1) Spark Plug
    $12.09 $6.73
    Add to Cart
  • NGK Spark Plugs 7862 Spark Plug 7862
    Add to Cart

    NGK Spark Plugs 7862 Spark Plug 7862

    NGK Spark Plugs

    $20.19 $10.75
    NGK Spark Plugs 7862 Spark Plug 7862   Original equipment on many late model applications Platinum at the fine-wire center electrode as well as at the ground electrode provides extended service life The platinum at the ground electrode adds...
    Part Number:
    41-PZTR5A15
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    7862
    What's in the Box:
    (1) Spark Plug
    $20.19 $10.75
    Add to Cart
  • Sierra Wire Set OMC Ford 5.0-5.8L 18-8842-1
    Add to Cart

    Sierra Wire Set OMC Ford 5.0-5.8L 18-8842-1

    Sierra

    $86.59 $64.99
    Sierra Wire Set OMC Ford 5.0-5.8L 18-8842-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...
    Part Number:
    47-88421
    Availability:
    In Stock - Ships same or next business day.
    Application:
    OMC Sterndrive/Cobra - 5.0L - 5.8L Ford 8 cylinder ('89-'90) - conventional ignition
    $86.59 $64.99
    Add to Cart
  • Martyr Anodes 2 13/16 Zinc Rudder Anode Cmr02
    Add to Cart

    Martyr Anodes 2 13/16 Zinc Rudder Anode Cmr02

    Martyr Anodes

    $17.79 $11.99
    Martyr Anodes 2 13/16 Zinc Rudder Anode Cmr02 Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water
    Part Number:
    194-CMR02
    Availability:
    In Stock - Ships same or next business day.
    Size:
    2-13/16" dia. x 1/2"
    Material:
    Zinc
    $17.79 $11.99
    Add to Cart

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.