Aftermarket Parts
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Sold Out, please call for ETA.
Sierra Manifold 18-1929
Sierra
$471.69 $424.26Sierra Manifold 18-1929Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1929
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Crusader 97992 - 97114
- Application:
- Starboard - GM big block V8 - 454 cid (models CH350 & 454XL).
Use with gasket 0418 - mounting kit 8524
$471.69 $424.26 -
Sold Out, please call for ETA.
Sierra Manifoldport-Om#912442 18-1903
Sierra
$537.69 $395.61Sierra Manifoldport-Om#912442 18-1903Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1903
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- OMC Sterndrive/Cobra 912442
- Application:
- V8 Port Side - most GM V8 small blocks with end riser.
Uses mounting kit 8502
$537.69 $395.61 -
Sierra Manifoldstb-Om#912441 18-1902
Sierra
$466.89 $368.24Sierra Manifoldstb-Om#912441 18-1902Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1902
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- OMC Sterndrive/Cobra 912441
- Application:
- V8 Starboard Side - most GM V8 small blocks with end riser.
Uses mounting kit 8502
$466.89 $368.24 -
Sierra Map Sensor OMC/Vp# 3850396 18-7684
Sierra
$194.39 $141.18Sierra Map Sensor OMC/Vp# 3850396 18-7684- Part Number:
- 47-7684
- Availability:
- In Stock - Ships same or next business day.
$194.39 $141.18 -
Sold Out, please call for ETA.
Sierra MerCruiser O/B Tachometer Harness Ih15105
Sierra
$135.39 $95.87Sierra MerCruiser O/B Tachometer Harness Ih25105- Part Number:
- 11-IH15105
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Mariner/ Merc O/B Tach Harness
$135.39 $95.87 -
Sold Out, please call for ETA.
Sierra Needle Valve Yamaha #6G1-14546-00 18-7054
Sierra
$13.59 $11.36Sierra Needle Valve Yamaha #6G1-14546-00 18-7054- Part Number:
- 47-7054
- Availability:
- In Stock - Ships same or next business day.
$13.59 $11.36 -
Sold Out, please call for ETA.
Sierra O Ring Vp925055/Mc25-26802 18-7180
Sierra
$1.52Sierra O Ring Vp925055/Mc25-26802 18-7180- Part Number:
- 47-7180
- Availability:
- In Stock - Ships same or next business day.
$1.52 -
Sierra Oil Filter Wrench 18-9778
Sierra
$23.09 $20.26Sierra Oil Filter Wrench 18-9778- Part Number:
- 47-189778
- Availability:
- In Stock - Ships same or next business day.
- Fits:
- 2-7/16" to 3"
$23.09 $20.26 -
Sierra Om Fuel Pump Kit 55-1641 18-7821
Sierra
$39.39 $32.99Sierra Om Fuel Pump Kit 55-1641 18-7821- Part Number:
- 47-7821
- Availability:
- In Stock - Ships same or next business day.
$39.39 $32.99 -
Sierra Om Fuel Pump Kit E/J 393103 18-7820
Sierra
$23.09 $18.99Sierra Om Fuel Pump Kit E/J 393103 18-7820- Part Number:
- 47-7820
- Availability:
- In Stock - Ships same or next business day.
$23.09 $18.99 -
Sierra Om Trim Sender 18-7634
Sierra
$236.69 $170.22Sierra Om Trim Sender 18-7634Replaces: OEM #984748Fits: OMC Cobra- Part Number:
- 47-7634
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Fits: OMC Cobra
$236.69 $170.22 -
Sold Out, please call for ETA.
Sierra OMC Wp Shaft909121 55-1863 18-2183
Sierra
$312.59 $186.69Sierra OMC Wp Shaft909121 55-1863 18-2183- Part Number:
- 47-2183
- Availability:
- In Stock - Ships same or next business day.
$312.59 $186.69 -
Sold Out, please call for ETA.
Sierra Overhaul Gasket Set OMC V.Grind 18-4374
Sierra
$168.99 $3.90Sierra Overhaul Gasket Set OMC V.Grind 18-4374- Part Number:
- 47-4374
- Availability:
- In Stock - Ships same or next business day.
$168.99 $3.90 -
Sierra P 172522 J/E Tune Up Kit 18-5006
Sierra
$33.59 $28.99Sierra P 172522 J/E Tune Up Kit 18-5006Contains: Contact sets (2); condenser (2)- Part Number:
- 47-5006
- Availability:
- In Stock - Ships same or next business day.
- Application:
- 3-40 HP various models 1950-1990
- Replaces:
- OMC 172522
$33.59 $28.99 -
Sold Out, please call for ETA.
Sierra Pinion Nut - OMC# 314730 18-3719
Sierra
$7.19 $5.99Sierra Pinion Nut - OMC# 314730 18-3719OMC Sterndrive/Cobra: Replaces 314730MerCruiser & Mercury/Mariner: Replaces 11-35921- Part Number:
- 47-3719
- Availability:
- In Stock - Ships same or next business day.
$7.19 $5.99 -
Sold Out, please call for ETA.
Sierra Power Pack E/J 583748 18-5766
Sierra
$174.29 $130.25Sierra Power Pack E/J 583748 18-5766- Part Number:
- 47-5766
- Availability:
- In Stock - Ships same or next business day.
$174.29 $130.25 -
Sierra Power Pack E/J 584783 18-5767
Sierra
$138.39 $97.36Sierra Power Pack E/J 584783 18-5767- Part Number:
- 47-5767
- Availability:
- In Stock - Ships same or next business day.
$138.39 $97.36 -
Sierra Power Pack E/J 585261 18-5785
Sierra
$224.89 $140.90Sierra Power Pack E/J 585261 18-5785- Part Number:
- 47-5785
- Availability:
- In Stock - Ships same or next business day.
$224.89 $140.90 -
Sierra Power Trim Reservoir 18-6778
Sierra
$97.39 $72.88Sierra Power Trim Reservoir 18-6778- Part Number:
- 47-6778
- Availability:
- In Stock - Ships same or next business day.
$97.39 $72.88 -
Sold Out, please call for ETA.
Sierra Propeller Cone Vp850785 18-4210
Sierra
$103.59 $76.81Sierra Propeller Cone Vp850785 18-4210- Part Number:
- 47-4210
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Prop cone
- Replaces:
- 850785 - 854045 - AQ200 - 250 -
270 - 270T - 275 - 280 - 280T - 280PT - 290
$103.59 $76.81
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.