Aftermarket Parts
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Seastar Hydraulic Steering Oil Gallon Ha5440H
Seastar
$161.89 $109.99Seastar Hydraulic Steering Oil Gallon Ha5440H SeaStar Hydraulic Steering Fluid is engineered with a proprietary additive package which contains anti-foaming and anti-rusting agents, anti-oxidants, viscosity stabilizers, corrosion inhibitors,...- Part Number:
- 1-HA5440H
- Availability:
- In Stock - Ships same or next business day.
- Size:
- Gallon
$161.89 $109.99 -
Seastar Power Purge Jr Ha5445-2
Seastar
$1,717.79 $1,399.99Seastar Power Purge Jr Ha5445-2 The quickest way to bleed a SeaStar® or BayStar® system and assure a rock-solid steering feel every time! Power Purge systems reduce installation and warranty costs while enhancing the quality of the boat for the...- Part Number:
- 1-HA54452
- Availability:
- In Stock - Ships same or next business day.
$1,717.79 $1,399.99 -
Sierra Black Sterling Trim-MerCruiser Yam 67023P
Sierra
$58.29 $49.99Sierra Black Sterling Trim-MerCruiser Yam 67023PBlack Sterling instruments have white graphics and black background on spun aluminum dial; scratch-resistant domed glass lens; perimeter lit dial; elite stainless steel bezel; black pointer with fire orange...- Part Number:
- 11-67023P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Trim: Mariner/Mercury Yamaha - 2001 to date
- Dial Range:
- Up-Down
- Sender Code:
- Eng Mfr. Supply
$58.29 $49.99 -
Sierra Carb Kit 18-7247
Sierra
$34.79 $25.99Sierra Carb Kit 18-7247- Part Number:
- 47-7247
- Availability:
- In Stock - Ships same or next business day.
- OEM #:
- J/E # 438996 - 436852
$34.79 $25.99 -
Sierra E-Tec Drain Screw W Magnet 18-4249
Sierra
$22.19 $13.68Sierra E-Tec Drain Screw W Magnet 18-4249For: All E-Tec.- Part Number:
- 47-4249
- Availability:
- In Stock - Ships same or next business day.
- Description:
- with magnet
- Fits:
- Replaces J/E 318544
$22.19 $13.68 -
Sold Out, please call for ETA.
Sierra Elbow Exhaust - Barr#20-0082 18-1999
Sierra
$282.99 $201.23Sierra Elbow Exhaust - Barr#20-0082 18-1999Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1999
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Barr 20-0082
$282.99 $201.23 -
Sierra Exhaust Gasket/Indmar 18-0603
Sierra
$51.09 $39.99Sierra Exhaust Gasket/Indmar 18-0603- Part Number:
- 47-0603
- Availability:
- In Stock - Ships same or next business day.
$51.09 $39.99 -
Sierra Exhaust Manifold Gasket Set Bblkv8Mh 18-4348
Sierra
$56.89 $44.99Sierra Exhaust Manifold Gasket Set Bblkv8Mh 18-4348- Part Number:
- 47-4348
- Availability:
- In Stock - Ships same or next business day.
$56.89 $44.99 -
Sierra Filter-H2O Separator Vp-Om Sx-Efi 10M 18-7989
Sierra
$12.09 $10.99Sierra Filter-H2O Separator Vp-Om Sx-Efi 10M 18-7989- Part Number:
- 47-7989
- Availability:
- In Stock - Ships same or next business day.
- Contains:
- Filter Only
- Replaces:
- Volvo 3851218-2 - 3852413 - 3862228. OMC 502906
$12.09 $10.99 -
Sierra Fuel Filter Assembly Yamaha #61N-24560- 18-79910
Sierra
$39.79 $32.99Sierra Fuel Filter Assembly Yamaha #61N-24560- 18-79910- Part Number:
- 47-79910
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 61N-24560-00 - 61N-24560-10
$39.79 $32.99 -
Sierra Fuel Filter Kit Mc1397-8767Q 18-7869
Sierra
$11.39 $8.98Sierra Fuel Filter Kit Mc1397-8767Q 18-7869- Part Number:
- 47-7869
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercury 1397-8767 - 1397-8545
$11.39 $8.98 -
On Sale
Sierra Fuel Filter Suzuki 15410-87J10 18-7716
Sierra
$12.49 $7.38Sierra Fuel Filter Suzuki 15410-87J10 18-7716- Part Number:
- 47-7716
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Suzuki 15410-87J10
- Application:
- Johnson 25 hp - 4-stroke ('04-'05) - 30 hp - 4-stroke ('04-'07) - 40 - 60 - 70 hp - 4-stroke ('03-'04 & '06)
Evinrude 25 - 30 - 40 - 50 - 70 hp - 4-stroke ('00-'01)
$12.49 $7.38 -
Sold Out, please call for ETA.
Sierra Gasket Elbow Mp#283135 18-0672
Sierra
$12.39 $10.56Sierra Gasket Elbow Mp#283135 18-0672- Part Number:
- 47-0672
- Availability:
- In Stock - Ships same or next business day.
$12.39 $10.56 -
Sierra Ignition Coil Mc817378T 18-5443
Sierra
$127.49 $92.99Sierra Ignition Coil Mc817378T 18-5443- Part Number:
- 47-5443
- Availability:
- In Stock - Ships same or next business day.
$127.49 $92.99 -
Sierra Marine Module Ignition Mc850487 & Crus 18-5107-1
Sierra
$175.99 $129.99Sierra Marine Module ignition Mc850487&Crus 18-5107-1- Part Number:
- 47-51071
- Availability:
- In Stock - Ships same or next business day.
$175.99 $129.99 -
Sierra Needle & Seat OMC 396522 18-7094
Sierra
$9.89 $7.74Sierra Needle & Seat OMC 396522 18-7094- Part Number:
- 47-7094
- Availability:
- In Stock - Ships same or next business day.
$9.89 $7.74 -
Sierra Serp Belt MerCruiser Oe 57-865615005 18-15121
Sierra
$95.69 $82.99Sierra Serp Belt MerCruiser Oe 57-865615005 18-15121- Part Number:
- 47-15121
- Availability:
- In Stock - Ships same or next business day.
- Length:
- 87.5"
- Width:
- 13/16"
- Application:
- 2001-05: 350 Mag MPI MIE - 350 Mag MPI Ski - 350 Mag MPI Horizon MIE - 5.7L Ski -
5.7L MIE - Black Scorpion Ski - MX 6.2L MPI Horizon MIE - MX 6.2L MPI MIE - MX 6.2L MPI Ski - OEM #:
- 57-865615005
$95.69 $82.99 -
Sierra Thermostat Kit Ev-Jn V6 X-Flow 18-3674
Sierra
$48.29 $39.99Sierra Thermostat Kit Ev-Jn V6 X-Flow 18-3674- Part Number:
- 47-3674
- Availability:
- In Stock - Ships same or next business day.
$48.29 $39.99 -
Sierra Trim Pump Assembly W-Stl Bracket 18-6752
Sierra
$1,097.19 $746.88Sierra Trim Pump Assembly W-Stl Bracket 18-6752For 1983 and later MerCruiser applications without "quick connect"- Part Number:
- 47-6752
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Hydraulic Pump Assy w/Metal Brkt
- Replaces:
- 14336A9 - 88183A12
$1,097.19 $746.88 -
Sierra Tune Up Kit OMC 172523 18-5002
Sierra
$41.19 $23.99Sierra Tune Up Kit OMC 172523 18-5002Contains: Contact sets (2); condenser (2)- Part Number:
- 47-5002
- Availability:
- In Stock - Ships same or next business day.
- Application:
- 18-40 HP various models 1962-1976
- Replaces:
- OMC 172523
$41.19 $23.99
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.