Aftermarket Parts
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Seastar Hose Kit-2Pc Seastar O/B 16 Ft Ho5116
Seastar
$245.49 $154.99Seastar Hose Kit-2Pc Seastar O/B 16 Ft Ho5116 Includes two hoses - can be used with all SeaStar systems, except SeaStar PRO, BayStar, Capilano and 3-line inboard systems. ID of 5/16".- Part Number:
- 1-HO5116
- Availability:
- In Stock - Ships same or next business day.
- Length:
- 16'
- Box:
- 2
$245.49 $154.99 -
Sold Out, please call for ETA.
Seastar Support Rod Kit Baystr Cylindr Hp6050
Seastar
$176.69 $117.38Seastar Support Rod Kit Baystr Cylindr Hp6050- Part Number:
- 1-HP6050
- Availability:
- In Stock - Ships same or next business day.
- Type:
- Support Rod
- Description:
- Support rod for Baystar Cylinder
- Bag:
- 2
$176.69 $117.38 -
Sierra 09-812B Impeller 18-3306
Sierra
$82.29 $43.60Sierra 09-812B Impeller 18-330612 fin Neoprene - spline- Part Number:
- 47-3306
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 09-812B
- Depth:
- 1-15/16"
- Dia.:
- 2-1/4"
- Shaft:
- 3/4" Dia.
$82.29 $43.60 -
Sierra Fuel Water Separator Filter 18-8149
Sierra
$20.29 $16.18Sierra Fuel Water Separator Filter 18-8149- Part Number:
- 47-8149
- Availability:
- In Stock - Ships same or next business day.
- Contains:
- High Capacity Filter.
Replaces Volvo 3847644
$20.29 $16.18 -
Sierra Gasket Set-Honda#16010-Zv4-005 18-2480
Sierra
$20.19 $16.08Sierra Gasket Set-Honda#16010-Zv4-005 18-2480- Part Number:
- 47-2480
- Availability:
- In Stock - Ships same or next business day.
$20.19 $16.08 -
Sierra Gear Lube-Premium Qt 18-9600-2
Sierra
$18.69 $16.90Sierra Gear Lube-Premium Qt 18-9600-2- Part Number:
- 47-96002
- Availability:
- In Stock - Ships same or next business day.
- Size:
- Quart
$18.69 $16.90 -
Sierra OMC 3854270 Cobra Transom Seal Bellows Kit 18-2771
Sierra
$318.99 $204.72Service kit includes replacement bellows, gimbal bearing, gaskets, & o-rings for OMC Cobra non-cone clutch stern drives. Sierra Cobra transom bellows kit Fits all OMC Cobra stern drives...- Part Number:
- 47-2771
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 3854270
$318.99 $204.72 -
Sierra Switch Oil Pressure 6Psi Trip Op22900
Sierra
$23.29 $20.33Sierra Switch Oil Pressure 6Psi Trip Op22900Used for Electric Fuel Pump Shut Off. Thread size: 1/8" - 27 Terminal type: 10-32 stud- Part Number:
- 11-OP22900
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Set at 6 psi
$23.29 $20.33 -
Sierra Thermostat - Crusader# 97895 18-3649
Sierra
$31.49 $25.46Sierra Thermostat - Crusader# 97895 18-3649- Part Number:
- 47-3649
- Availability:
- In Stock - Ships same or next business day.
$31.49 $25.46 -
Starbrite Do-It-Yourself Marine Boat Winterizing and Descaling Kit 35001
Starbrite
$106.19 $73.45Starbrite Do-It-Yourself Winterizing Kit 35001 • Winterizing kit quickly and easily adds antifreeze to inboard and outboard engines• Kit will also descale engine cooling systems• Removes debris to...- Part Number:
- 74-35001
- Availability:
- In Stock - Ships same or next business day.
$106.19 $73.45 -
Uflex Ob Hose 3' with Dbl Bend 2/Bx Kitobdbr-03'
Uflex
$174.99 $158.65Uflex Ob Hose 3' with Dbl Bend 2/Bx Kitobdbr-03' Two hoses with swaged fittings featuring bend restrictors are suitable for use with Uflex cylinders and helms. OBDBR hoses have bend restrictors on...- Part Number:
- 216-KITOBDBR03
- Availability:
- In Stock - Ships same or next business day.
- Description:
- w/Bend Restrictors
- Length:
- 3'
- Box:
- 2
$174.99 $158.65 -
Martyr Anodes 1 1/2 Zinc Shaft Anode Cmx07
Martyr Anodes
$23.99 $17.09Martyr Anodes 1 1/2 Zinc Shaft Anode Cmx07 Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water- Part Number:
- 194-CMX07
- Availability:
- In Stock - Ships same or next business day.
- ID:
- 1-1/2"
- OD:
- 2-1/2"
- Length:
- 2-1/2"
- Material:
- Zinc
$23.99 $17.09 -
Martyr Anodes 5 1/8 Zinc Rudder Anode Cmr05
Martyr Anodes
$63.39 $29.32Martyr Anodes 5 1/8 Zinc Rudder Anode Cmr05 Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water- Part Number:
- 194-CMR05
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 5-1/8" dia. x 7/8
- Material:
- Zinc
$63.39 $29.32 -
Martyr Anodes 8X4X3/4 Hull Anode Cmzhc5Az
Martyr Anodes
$111.69 $42.36Martyr Anodes 8X4X3/4 Hull Anode Cmzhc5AzZinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water- Part Number:
- 194-CMZHC5AZ
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 8" L x 4" W x 3/4" H
- Hole:
- 4-3/8"
- Material:
- Zinc
$111.69 $42.36 -
Sold Out, please call for ETA.
NGK Spark Plugs 3478 Spark Plug 3478
NGK Spark Plugs
$16.99 $9.16NGK Spark Plugs 3478 Spark Plug 3478 Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-CR8EK
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3478
- Pkg.:
- Boxed
- What's in the Box:
- (1) Spark Plug
$16.99 $9.16 -
NGK Spark Plugs 7131 Spark Plug 7131
NGK Spark Plugs
$6.39 $4.33NGK Spark Plugs 7131 Spark Plug 7131Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-BPR6ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7131
- Pack:
- 4
- Pkg.:
- Boxed
$6.39 $4.33 -
Sold Out, please call for ETA.
Racor Filter Optimax/Verado 2Mic 2Pk 31871
Racor
$79.99 $64.24Racor Filter Optimax/Verado 2Mic 2Pk 31871 Product Features: Legendary Aquabloc®II, 2 micron filter media, removes up to 100% of free water and protects sensitive fuel system components from...- Part Number:
- 62-31871
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercury 35-884380T or 35-8M0020349
- Pack:
- 2
$79.99 $64.24 -
Seachoice Oil Change Pump 19181
Seachoice
$30.30 $24.05Seachoice Oil Change Pump 19181 For emptying oil from inboard and I/O enginesMade of solid brass with removable tubing for ease of operation and cleaning.- Part Number:
- 50-19181
- Availability:
- In Stock - Ships same or next business day.
$30.30 $24.05 -
Seastar Ball Knob Red 4009912
Seastar
$19.32Seastar Ball Knob Red 4009912 Replacement control knobs fit most controls with 3/8-24 threaded handles.- Part Number:
- 1-4009912
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Red Ball Knob Replacement
$19.32 -
SeaStar HK4300A-3 BayStar Compact Hydraulic Steering System Kit NO Hoses
Seastar
$1,072.09 $963.99Baystar Kit, HK4300A-3 Hydraulic Steering Kit without Tube Baystar Steering Kit: With mechanical steering you sacrifice a degree of comfort. Traditional hydraulic systems may be more than is needed...- Part Number:
- 1-HK4300A3
- Availability:
- In Stock - Ships same or next business day.
- Includes:
- HH43143 Std Helm w/o Hoses
$1,072.09 $963.99
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.