Aftermarket Parts
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Sierra Marine Tach-Hour Small Engine Tachometer / Hourmeter with Sensor Wire for 2/4 Stroke 2 Cylinders, 5' 56969P
Sierra
$63.89 $52.99Sierra Tach-Hour Small Engine 56969PFor any gasoline motor up to 2 cylinder. Displays RPM up to 9000. Allows hour monitoring for even the smallest outboard motors. Great for 2 or 4 stroke. Displays RPM when running total hours when off.No power or ground...- Part Number:
- 47-56969P
- Availability:
- In Stock - Ships same or next business day.
$63.89 $52.99 -
Sierra MerCruiser W/P Kit 46-96148Q 8 18-3517
Sierra
$58.49 $40.18Sierra MerCruiser W/P Kit 46-96148Q 8 18-3517- Part Number:
- 47-3517
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 46-60367A1 - 46-96148A5 - 46-96148A8
$58.49 $40.18 -
Sierra Oil 25W40 FCW I/O-I/B
Sierra
$14.79 $13.99Sierra Oil-25W40 FCW I/O-I/B Qt 18-9400-2- Part Number:
- NW-SPB25W40
- Availability:
- In Stock - Ships same or next business day.
- Grade:
- 25W40
$14.79 $13.99 -
Sierra Outdrive Seal MerCruiser 12708 18-1240
Sierra
$16.59 $13.99Sierra Outdrive Seal MerCruiser 12708 18-1240- Part Number:
- 47-1240
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Mercruiser: For Bravo. Replaces 12708.
$16.59 $13.99 -
Sierra Overhaul Kit-Velvetdrive 71-72 18-2591
Sierra
$532.29 $364.99Sierra Overhaul Kit-Velvetdrive 71-72 18-2591Service kit for Borg-Warner Velvet Drive 71 and 72 series transmission.- Part Number:
- 47-2591
- Availability:
- In Stock - Ships same or next business day.
- Includes:
- Gaskets - Seals - Sealing rings - Bronze and Steel plates
$532.29 $364.99 -
Sierra Pan Gasket 1Pc GM 3L 18-1239
Sierra
$145.59 $119.99Sierra Pan Gasket 1Pc GM 3L 18-1239- Part Number:
- 47-1239
- Availability:
- In Stock - Ships same or next business day.
$145.59 $119.99 -
Sierra U-Joint Assembly MerCruiser #864244A 2 18-6401
Sierra
$824.69 $589.99Sierra U-Joint Assembly MerCruiser #864244A 2 18-6401- Part Number:
- 47-6401
- Availability:
- In Stock - Ships same or next business day.
$824.69 $589.99 -
Sierra Volvo/OMC Sx Transom Seal Kit 18-2772-1
Sierra
$258.89 $189.99Sierra Volvo/OMC Sx Transom Seal Kit 18-2772-1- Part Number:
- 47-27721
- Availability:
- In Stock - Ships same or next business day.
- Contains:
- Gimbal Bearing 2100 -
Bellows 2765 & 1074 - Seal 2996 - Hose Clamp - Application:
- OMC Sterndrive/Cobra
& Volvo SX cobra drives w/cone clutch
$258.89 $189.99 -
Sierra Vst Kit-Yam F150-Lf150 2004-12 18-79950
Sierra
$146.29 $114.99Sierra Vst Kit-Yam F150-Lf150 2004-12 18-79950- Part Number:
- 47-79950
- Availability:
- In Stock - Ships same or next business day.
- Application:
- F150(04-12) - LF150(04-12)
- OEM #:
- 63P-13915-00 -
69J-24501-10 -
63P-14984-00
$146.29 $114.99 -
Sierra Wire Set GM 7.4L-8.2L Conv 18-8804-1
Sierra
$86.99 $61.72Sierra Wire Set GM 7.4L-8.2L Conv 18-8804-1Magnetic 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:
- 47-88041
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercruiser - 260 TR - 305 LH & RH - 320 EFI - 330 TR - 350 LH & RH - 350 MAG - 420 - 454 & 454 MAG - 5.0L & 5.0 I/B & LX - 5.7L - 5.7L I/B & SKI - 7.4L & 7.4L I/B - 8 cylinder - Thunderbolt ignition
$86.99 $61.72 -
Sierra Wire-Plug Mag MerCruiser #84-881908T 18-28083
Sierra
$26.19 $21.99Sierra Wire-Plug Mag MerCruiser #84-881908T 18-28083- Part Number:
- 47-28083
- Availability:
- In Stock - Ships same or next business day.
- Application:
- V6 EFI/DFI/DTS
- Replaces:
- 84-881908T (1 wire)
$26.19 $21.99 -
Uflex Fitting-Boss For Uc128Obf Boss Fitting
Uflex
$55.69 $49.99Uflex Fitting-Boss For Uc128Obf Boss Fitting- Part Number:
- 216-BOSSFITTING
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Boss Fitting 3/8"(9.5mm)
- Fits:
- all cylinders except UC94-OBF with serial# prior to 30 1156 000001
$55.69 $49.99 -
Attwood Marine 90 Deg Tank Vent Black Plas with SS 66419-3
Attwood Marine
$23.81 $15.99Attwood Marine 90 Deg Tank Vent Black Plas with SS 66419-3 These vents help prevent water from entering the fuel tank, yet allow air to vent freely, during normal sea conditions and washdowns. This eliminates the need for an anti-siphon loop in the vent...- Part Number:
- 23-664193
- Availability:
- In Stock - Ships same or next business day.
- Type:
- SS
- Hose:
- 5/8" I.D.
- Max Hull Thickness:
- 9/16"
- Hole:
- 3/4"
- Pkg.:
- Retail
$23.81 $15.99 -
Centek 6.00 Vernalift Side In/Top Out 1500092
Centek
$1,171.39 $951.16Centek 6.00 Vernalift Side In/Top Out 1500092Extremely effective in reducing engine exhaust noise and preventing water from returning to the engine. High strength design provides a significant safety margin over other existing fiberglass lift mufflers...- Part Number:
- 383-1500092
- Availability:
- In Stock - Ships same or next business day.
- A1:
- 6
- A2:
- 6
- B:
- 5
- D:
- 16.17
- E:
- 8.75
- F:
- 4
$1,171.39 $951.16 -
Centek Muffler-Vernalift 2X2 Side/Top 1500027
Centek
$422.69 $306.54Centek Muffler-Vernalift 2X2 Side/Top 1500027Extremely effective in reducing engine exhaust noise and preventing water from returning to the engine. High strength design provides a significant safety margin over other existing fiberglass lift mufflers...- Part Number:
- 383-1500027
- Availability:
- In Stock - Ships same or next business day.
- A1:
- 2
- A2:
- 2
- B:
- 2.5
- D:
- 10.04
- E:
- 6.5
- F:
- 2
$422.69 $306.54 -
Centek Vernalift 3" x 3 Side In/Top Out 1500232
Centek
$455.29 $374.48Centek Vernalift 3" x 3 Side In/Top Out 1500232Extremely effective in reducing engine exhaust noise and preventing water from returning to the engine. High strength design provides a significant safety margin over other existing fiberglass lift mufflers...- Part Number:
- 383-1500232
- Availability:
- In Stock - Ships same or next business day.
- A1:
- 3
- A2:
- 3
- B:
- 3
- D:
- 10.06
- E:
- 4.75
- F:
- 2.25
$455.29 $374.48 -
Martyr Anodes Anode Aluminum Alpha-Plate Gen II Cm821629Ca
Martyr Anodes
$24.59 $14.10Martyr Anodes Anode Aluminum Alpha-Plate Gen II Cm821629CaAluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water- Part Number:
- 194-CM821629CA
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Alpha I - Gen. II
- Material:
- Aluminum
$24.59 $14.10 -
Martyr Anodes Zinc Med Tear Drop Cmt21
Martyr Anodes
$18.39 $10.80Martyr Anodes Zinc Med Tear Drop Cmt21Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water- Part Number:
- 194-CMT21
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 5-1/4"L x 2"W x 1"H
- Hole:
- 1-5/8"
- Material:
- Zinc
$18.39 $10.80 -
NGK Spark Plugs B7Hs Spark Plug 5110
NGK Spark Plugs
$6.49 $4.99NGK Spark Plugs B7Hs Spark Plug 5110 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:
- 41-5110
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- B7HS
- Pkg.:
- Boxed
$6.49 $4.99 -
Racor Element-Replacement 500 Turbine 2M 2010Sm-Or
Racor
$19.99 $12.91Racor Element-Replacement 500 Turbine 2M 2010Sm-OrWaterproof, rustproof, dirtproof. Engineered to repel water and remove solid contaminants before they can damage precision engine components. Racor Aquabloc elements are available in different lengths for...- Part Number:
- 62-2010SMOR
- Availability:
- In Stock - Ships same or next business day.
- Micron:
- 2
- End Cap:
- Brown
- Fits:
- 500
$19.99 $12.91
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.