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Aftermarket Parts

Aftermarket Parts

  • Sierra Tune Up Kit 18-5281

    Sierra Tune Up Kit 18-5281

    Sierra

    $56.89 $38.19
    Sierra Tune Up Kit 18-5281Tune up kits include cap and rotor.
    Part Number:
    47-5281
    Availability:
    In Stock - Ships same or next business day.
    Description:
    V-8
    Application:
    Crusader - Indmar - Pleasurecraft - Mercruiser
    $56.89 $38.19
  • Sierra Vst Kit-Yam Lz-Vz-Z 150-300Hp 18-79953

    Sierra Vst Kit-Yam Lz-Vz-Z 150-300Hp 18-79953

    Sierra

    $81.69 $61.27
    Sierra Vst Kit-Yam Lz-Vz-Z 150-300Hp 18-79953
    Part Number:
    47-79953
    Availability:
    In Stock - Ships same or next business day.
    Application:
    LZ150(00-05) - LZ200(00-11) - LZ250(03-05) - LZ300(04-06) - VZ150(00-11) - VZ175(01-11) - VZ200(01-09) - VZ225(03-09) - VZ250(03-09) VZ300(04-09) - Z150(00-05) - Z175(01-05) - Z200(00-11) - Z250(03-05) - Z300(04-06)
    OEM #:
    68F-13915-00 -
    66K-14984-00
    $81.69 $61.27
  • Sierra White Premier Volt Gauge 62555P

    Sierra White Premier Volt Gauge 62555P

    Sierra

    $75.69 $54.47
    Sierra White Premier Volt Gauge 62555PWhite dial; black graduations/numerals (metrics in blue); red pointerScratch resistant curved glass lenses; with polished stainless steel; near-flush bezelsU.S. and metric scales; with ISO symbols; where...
    Part Number:
    11-62555P
    Availability:
    In Stock - Ships same or next business day.
    Size:
    2"
    Type:
    Voltmeter 12Volt
    Dial Range:
    8-18 VDC
    Sender Code:
    N/R
    $75.69 $54.47
  • Sierra Wire Set Chrysler 318-360Ci V8 18-8824-1

    Sierra Wire Set Chrysler 318-360Ci V8 18-8824-1

    Sierra

    $109.59 $86.03
    Sierra Wire Set Chrysler 318-360Ci V8 18-8824-1Magnetic 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:
    47-88241
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Flagship - Indmar - Marine Power & Mastercraft - 454 - 7.4L 8 cylinder - EST ignition. Mercruiser - 454 Hi Performance - 8 cylinder - Thunderbolt ignition
    $109.59 $86.03
  • Sold Out, please call for ETA.
    Sierra Wire Set Evin-John 90-115Hp V4 18-8839-1

    Sierra Wire Set Evin-John 90-115Hp V4 18-8839-1

    Sierra

    $61.09 $44.83
    Sierra Wire Set Evin-John 90-115Hp V4 18-8839-1Magnetic 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:
    47-88391
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Johnson/Evinrude - 90 & 115 hp O/B
  • Sierra Wire Set GM 3.0L Delco Est 18-8811-1

    Sierra Wire Set GM 3.0L Delco Est 18-8811-1

    Sierra

    $58.09 $42.73
    Sierra Wire Set GM 3.0L Delco Est 18-8811-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine performancePremium...
    Part Number:
    47-88111
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Flagship - Indmar - Marine Power & Mastercraft - 181 - 3.0L -EST & EFI ignition - 4 cylinder. Mercruiser - All 4 cylinders
    $58.09 $42.73
  • Sierra Wire Set GM 3.8L-4.3L V6 Conv 18-8801-1

    Sierra Wire Set GM 3.8L-4.3L V6 Conv 18-8801-1

    Sierra

    $80.89 $59.99
    Sierra Wire Set GM 3.8L-4.3L V6 Conv 18-8801-1Magnetic 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:
    47-88011
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Flagship - Indmar - Marine Power & Mastercraft - 262 - 4.3L - 6 cylinder - conventional ignition. Mercruiser - 185 - 229 - cid - V6 - conventional ignition. OMC - 3.8L ('81-'86) - 4.3L ('85-'90) - 262 King Cobra ('89) - V6 - conventional ignition. Vo
    $80.89 $59.99
  • Sierra Wire Set GM2.5L-3.0L Delco Cnv 18-8800-1

    Sierra Wire Set GM2.5L-3.0L Delco Cnv 18-8800-1

    Sierra

    $52.79 $40.37
    Sierra Wire Set GM2.5L-3.0L Delco Cnv 18-8800-1Magnetic 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:
    47-88001
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Flagship - Indmar - Marine Power & Mastercraft - 181 - 3.0L - 4 cylinder - conventional ignition. Mercruiser - 120 - 140 hp - 2.5L & 3.0L 4 cylinder - conventional ignition. OMC Sterndrive/Cobra - 100 ('72-'73) - 110 ('64) - 120 ('65-'74) - 140 FF &
    $52.79 $40.37
  • Sierra Wire Set MerCruiser 420Hp-800Sc T.Bolt 18-8836-1

    Sierra Wire Set MerCruiser 420Hp-800Sc T.Bolt 18-8836-1

    Sierra

    $110.79 $86.99
    Sierra Wire Set MerCruiser 420Hp-800Sc T.Bolt 18-8836-1Magnetic 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:
    47-88361
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Mercruiser - 350 Mag Bravo MPI & Gen+ - 350 Mag MPI Ski Gen+ - 8 cylinder
    $110.79 $86.99
  • Sold Out, please call for ETA.
    Sierra Yanmr 129698-77010 Starter 18-6932

    Sierra Yanmr 129698-77010 Starter 18-6932

    Sierra

    $150.79 $136.78
    Sierra Yanmr 129698-77010 Starter 18-6932These all NEW replacement starters feature a permanent magnet design for more torque and longer life. They meet OEM specs and meet or exceed OEM output for guaranteed performance. High temperature epoxy coated...
    Part Number:
    47-6932
    Availability:
    In Stock - Ships same or next business day.
    Type:
    New
    Fits:
    Yanmar/Hitachi
    OEM #:
    Yanmar 121370-77010 - 129242-77010 - 129698-77010

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.