FREE SHIPPING OVER $99

BEST PRICE GUARANTEED

EARN POWERBOAT REWARDS

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

Aftermarket Parts

Aftermarket Parts

  • Martyr Anodes 8X4X3/4 Hull Anode Cmzhc5Az

    Martyr Anodes 8X4X3/4 Hull Anode Cmzhc5Az

    Martyr Anodes

    $76.99 $41.33
    Martyr Anodes 8X4X3/4 Hull Anode Cmzhc5AzZinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water
    Part Number:
    194-CMZHC5AZ
    Availability:
    In Stock - Ships same or next business day.
    Size:
    8" L x 4" W x 3/4" H
    Hole:
    4-3/8"
    Material:
    Zinc
    $76.99 $41.33
  • Sold Out, please call for ETA.
    NGK Spark Plugs 3478 Spark Plug 3478

    NGK Spark Plugs 3478 Spark Plug 3478

    NGK Spark Plugs

    $16.99 $9.16
    NGK Spark Plugs 3478 Spark Plug 3478 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-CR8EK
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    3478
    Pkg.:
    Boxed
    What's in the Box:
    (1) Spark Plug
  • NGK Spark Plugs Bp8Hs-10 Spark Plug 3823

    NGK Spark Plugs Bp8Hs-10 Spark Plug 3823

    NGK Spark Plugs

    $5.89 $4.13
    NGK Spark Plugs Bp8Hs-10 Spark Plug 3823 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-BP8HS10
    Availability:
    In Stock - Ships same or next business day.
    Model #:
    3823
    Pkg.:
    Boxed
    What's in the Box:
    (1) Spark Plug
    $5.89 $4.13
  • Sold Out, please call for ETA.
    OEM MerCruiser Power Trim Pump Harness Adapter  84-865771A02

    OEM MerCruiser Power Trim Pump Harness Adapter 84-865771A02

    Mercury Marine / Quicksilver

    $16.82 $15.99
    OEM MerCruiser Power Trim Pump Harness Adapter  84-865771A02 This adapter will adapt from old style round 3 prong to the new style flat plug This trim adapter converts the traditional Mercury trim plug to the Delphi connector Please confirm...
    Part Number:
    710-84-865771A02
    Availability:
    In Stock - Ships same or next business day.
  • Sold Out, please call for ETA.
    Racor Filter Optimax/Verado 2Mic 2Pk 31871

    Racor Filter Optimax/Verado 2Mic 2Pk 31871

    Racor

    $78.19 $54.99
    Racor Filter Optimax/Verado 2Mic 2Pk 31871 Product Features: Legendary Aquabloc®II, 2 micron filter media, removes up to 100% of free water and protects sensitive fuel system components from particulates Meets or exceeds OEM...
    Part Number:
    62-31871
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Mercury 35-884380T or 35-8M0020349
    Pack:
    2
  • Racor Replacement Heat Deflector 500Ma Rk 15104

    Racor Replacement Heat Deflector 500Ma Rk 15104

    Racor

    $151.59 $119.99
    Racor Replacement Heat Deflector 500Ma Rk 15104
    Part Number:
    62-RK15104
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Heat Deflector Shield Kit (includes # RK11340 Drain Fitting O-ring Kit & RK111910 Drain Fitting Kit)
    Fits:
    500MA Series
    $151.59 $119.99
  • Seastar Ball Knob Red 4009912

    Seastar Ball Knob Red 4009912

    Seastar

    $19.99 $18.99
    Seastar Ball Knob Red 4009912 Replacement control knobs fit most controls with 3/8-24 threaded handles.
    Part Number:
    1-4009912
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Red Ball Knob Replacement
    $19.99 $18.99
  • Seastar Control Cable 3600 Merc TFXtreme CCX630

    Seastar Control Cable 3600 Merc TFXtreme CCX630

    Seastar

    $98.69 $72.62
    Seastar Control Cable 3600 Merc TFXtreme CCX630 Fits Mercury Sport Jets. Cable has a 10-32 threaded terminal at control end and Mercury type engine end. The splined, coated core minimizes lost motion and offers maximum smoothness for complex and/or long...
    Part Number:
    NW-1CCX630
    Availability:
    In Stock - Ships same or next business day.
    $98.69 $72.62
  • Sold Out, please call for ETA.
    SeaStar HK4300A-3 BayStar Compact Hydraulic Steering System Kit NO Hoses

    SeaStar HK4300A-3 BayStar Compact Hydraulic Steering System Kit NO Hoses

    Seastar

    $1,072.09 $963.99
    Baystar Kit, HK4300A-3 Hydraulic Steering Kit without Tube Baystar Steering Kit: With mechanical steering you sacrifice a degree of comfort. Traditional hydraulic systems may be more than is needed on lower horsepower outboard engines. Built in the...
    Part Number:
    1-HK4300A3
    Availability:
    In Stock - Ships same or next business day.
    Includes:
    HH43143 Std Helm w/o Hoses
  • Sold Out, please call for ETA.
    Seastar Power Assist Unit-Seastar 12V Pa1200-2

    Seastar Power Assist Unit-Seastar 12V Pa1200-2

    Seastar

    $2,694.99
    Seastar Power Assist Unit-Seastar 12V Pa1200-2 The SeaStar Power Assist unit virtually eliminates all steering loads on the wheel and reduces steering effort in heavy or high torque applications to reduce driver fatigue and discomfort, just like in a car...
    Part Number:
    1-PA12002
    Availability:
    In Stock - Ships same or next business day.
    Description:
    12/24V with 15' Harness
  • Sierra Fuel Filter 18-7865

    Sierra Fuel Filter 18-7865

    Sierra

    $17.99 $13.99
    Sierra Fuel Filter 18-7865
    Part Number:
    47-7865
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Repl. Filter
    Replaces:
    Yamaha MAR-MINIF-IL-TR
    Size:
    10 Micron
    $17.99 $13.99
  • Sierra OMC 3854270 Cobra Transom Seal Bellows Kit 18-2771

    Sierra OMC 3854270 Cobra Transom Seal Bellows Kit 18-2771

    Sierra

    $318.99 $205.99
    Service kit includes replacement bellows, gimbal bearing, gaskets, & o-rings for OMC Cobra non-cone clutch stern drives.   Sierra Cobra transom bellows kit Fits all OMC Cobra stern drives without cone clutch Kit contains out drive...
    Part Number:
    47-2771
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    3854270
    $318.99 $205.99
  • Sierra Wire 7In Plug Mercury/Force 18-8819-1

    Sierra Wire 7In Plug Mercury/Force 18-8819-1

    Sierra

    $25.19 $18.99
    Sierra Wire 7In Plug Mercury/Force 18-8819-1Magnetic 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:
    47-88191
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Chrysler/Force/Mercury/Mariner - 7" wire
    $25.19 $18.99
  • Sierra Wire Set-Cr 7.4-8.2Xl Str Boot 18-8844-1

    Sierra Wire Set-Cr 7.4-8.2Xl Str Boot 18-8844-1

    Sierra

    $92.59 $71.20
    Sierra Wire Set-Cr 7.4-8.2Xl Str Boot 18-8844-1Magnetic 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:
    47-88441
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Crusader 454/502 XL Series (straight boot on plug end)
    $92.59 $71.20
  • Sierra Wire-9In Hi Perf Plug-Om582365 18-5231-1

    Sierra Wire-9In Hi Perf Plug-Om582365 18-5231-1

    Sierra

    $22.39 $16.99
    Sierra Wire-9In Hi Perf Plug-Om582365 18-5231-1Magnetic 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:
    47-52311
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Johnson/Evinrude - 9" wire
    $22.39 $16.99
  • Centek 4" Dynamax Muffler 1005003

    Centek 4" Dynamax Muffler 1005003

    Centek

    $425.19 $309.99
    Centek 4" Dynamax Muffler 1005003 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:
    383-1005003
    Availability:
    In Stock - Ships same or next business day.
    Ports:
    4"
    Dia.:
    16-3/4"
    Length:
    6.38"
    $425.19 $309.99

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.