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Aftermarket Parts

Aftermarket Parts

  • Seastar Cable Gard/Tilt Tube Seal Nut Sa39329P
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    Seastar Cable Gard/Tilt Tube Seal Nut Sa39329P

    Seastar

    $23.79 $20.01
    Seastar Cable Gard/Tilt Tube Seal Nut Sa39329P A unique wiper seal that slips over the cable output ram and snaps onto the tilt tube nut. Dirt and corrosion are wiped out while essential lubrication is sealed in the engine tilt tube. Adds years of...
    Part Number:
    1-SA39329P
    Availability:
    In Stock - Ships same or next business day.
    $23.79 $20.01
    Add to Cart
  • Sold Out, please call for ETA.
    Seastar Steerng Kit-Pro Hyd W-16' Hose Hk7516A-3

    Seastar Steerng Kit-Pro Hyd W-16' Hose Hk7516A-3

    Seastar

    $2,751.39 $1,898.09
    Seastar Steerng Kit-Pro Hyd W-16' Hose Hk7516A-3The ultimate steering for high speed single outboards, SeaStar PRO®, is designed for the high speed and performance of today's topend bass boats. Recommended for single outboards up to 350 HP (even with...
    Part Number:
    1-HK7516A3
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Steering kit w/16' hoses
    $2,751.39 $1,898.09
    Sold out - Special order may be available, please call 856-232-6969 ext1
  • Sierra Amega Gauge-Water Temp I/O-I/B 57904P
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    Sierra Amega Gauge-Water Temp I/O-I/B 57904P

    Sierra

    $73.79 $61.56
    Sierra Amega Gauge-Water Temp I/O-I/B 57904PSmart white and red graphics on a black dial background; these very low profile bezels follow the curve of the lenses to eliminate water trapping. Design with domed glass sheds water and resists scratching...
    Part Number:
    11-57904P
    Availability:
    In Stock - Ships same or next business day.
    Size:
    2"
    Type:
    Water Temp Gauge - Inboard/Outboard
    Dial Range:
    120 Deg --240 Deg -F
    Sender Code:
    D
    $73.79 $61.56
    Add to Cart
  • Sierra Bearing-Gimbal Mc-Vp 388555 18-21001
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    Sierra Bearing-Gimbal Mc-Vp 388555 18-21001

    Sierra

    $133.99 $80.87
    Sierra Bearing-Gimbal Mc-Vp 388555 18-21001Refer to the Sierra catalog for complete application information.
    Part Number:
    47-21001
    Availability:
    In Stock - Ships same or next business day.
    Fits:
    Mercruiser Stern Drives
    Replaces:
    30-879194A02
    $133.99 $80.87
    Add to Cart
  • Sierra Carburetor Rochester 4 Bbl 18-7615-1
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    Sierra Carburetor Rochester 4 Bbl 18-7615-1

    Sierra

    $992.49 $758.17
    Sierra Carburetor Rochester 4 Bbl 18-7615-1Sierra's marine aftermarket for high quality remanufactured carburetors. With carefully selected cores that are brought back to exacting OEM specifications. Each unit is flow tested to ensure proper operation...
    Part Number:
    47-76151
    Availability:
    In Stock - Ships same or next business day.
    Mfg:
    Rochester
    Mfg #:
    17057298 - 17059280 -
    17059288 - 17080561 -
    17085013
    Type:
    R4/4MV
    OEM:
    Mercruiser/OMC
    OEM #:
    1347-804624R02/985822
    Application:
    MCM 250/255/260/5.7L (1975-1991) -
    OMC 3.8L/4.3L/5.0L/5.7L/305/350
    & 454 (1977-1989) - 300MR/TRS
    $992.49 $758.17
    Add to Cart
  • Sierra Elbow Exh-Omc/Vp#3855270-9 18-1909-1
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    Sierra Elbow Exh-Omc/Vp#3855270-9 18-1909-1

    Sierra

    $399.89 $303.52
    Sierra Elbow Exh-Omc/Vp#3855270-9 18-1909-1Sierra manifolds are painted; packaged and leak tested.
    Part Number:
    47-19091
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    OMC Sterndrive/Cobra 913784 - 3855270 - 3850456 - 3857944 and Volvo 3855270-9 - 3857944-7 - 3863061
    $399.89 $303.52
    Add to Cart
  • Sierra Filter oil Vp 834337 18-7884
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    Sierra Filter oil Vp 834337 18-7884

    Sierra

    $19.89 $15.90
    Sierra Filteroil Vp 834337 18-7884Epoxy coating on all canisters for corrosion resistanceHeavy-wall steel canister for further corrosion protectionHigh-efficiency filter media that meets or exceeds the OE's filtrationBacked by Sierra's industry leading...
    Part Number:
    47-7884
    Availability:
    In Stock - Ships same or next business day.
    Application:
    3/4" x 16 NPT Thread
    Replaces:
    Universal: 299381 - Volvo 834337
    Note:
    1
    $19.89 $15.90
    Add to Cart
  • Sierra Gasket Dryjnt Mcs#27-864850A02 18-0722
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    Sierra Gasket Dryjnt Mcs#27-864850A02 18-0722

    Sierra

    $80.29 $65.80
    Sierra Gasket Dryjnt Mcs#27-864850A02 18-0722Fits: 4.3L; 5.0L; 5.7L; 6.2L utilizing the Dry Joint Manifold and Riser
    Part Number:
    47-0722
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Restricted
    Replaces:
    Mercruiser 27-864850A02
    $80.29 $65.80
    Add to Cart
  • Sierra Hourmeter Small Engine 56968P
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    Sierra Hourmeter Small Engine 56968P

    Sierra

    $59.19 $51.99
    Sierra Hourmeter Small Engine 56968PAllows hour monitoring for even the smallest gasoline motors. Great for 2 or 4 stroke. No power or ground required. Water and shock proof. Automatically turns on and off with the engine. Displays up to 9999 hours. 10...
    Part Number:
    47-56968P
    Availability:
    In Stock - Ships same or next business day.
    $59.19 $51.99
    Add to Cart
  • Sierra Manifold Ford 18-1998-1
    Add to Cart

    Sierra Manifold Ford 18-1998-1

    Sierra

    $487.39 $351.04
    Sierra Manifold Ford 18-1998-1Sierra manifolds are painted; packaged and leak tested.
    Part Number:
    47-19981
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    Barr# FM-1-83
    Application:
    Port & Starboard universal center riser manifold.
    Fits Ford - Crusader - Mercury - OMC and Pleasurecraft 302 and 351 CID engines.
    $487.39 $351.04
    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.