Aftermarket Parts
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NGK Spark Plugs 6431 Spark Plug 6431
NGK Spark Plugs
$7.89 $4.65NGK Spark Plugs 6431 Spark Plug 6431 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-BU8H
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6431
- Pkg.:
- Boxed
- What's in the Box:
- (1) Spark Plug
$7.89 $4.65 -
NGK Spark Plugs 2318 Spark Plug Iridium 2318
NGK Spark Plugs
$20.39 $11.99NGK Spark Plugs 2318 Spark Plug Iridium 2318 Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. Fine-tipped iridium-center electrode ensures high...- Part Number:
- 41-BR6FIX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 2318
- What's in the Box:
- (1) Spark Plug
$20.39 $11.99 -
NGK Spark Plugs 7164 Spark Plug Iridium 7164
NGK Spark Plugs
$17.29 $9.36NGK Spark Plugs 7164 Spark Plug Iridium 7164 Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. Fine-tipped iridium-center electrode ensures high...- Part Number:
- 41-TR55IX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7164
- What's in the Box:
- (1) Spark Plug
$17.29 $9.36 -
Racor Replacement Element For 660Rrac02 S3232Tul
Racor
$62.29 $45.99Racor Replacement Element For 660Rrac02 S3232Tul Aquabloc® II filter replacement elements are offered as retrofits to Racor clear or metal bowl filter assemblies Long-life with 98% filtration efficiency and 100% water removal per SAE test...- Part Number:
- 62-S3232TUL
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Element
- Micron:
- 10
- For:
- 660R-RAC-01
- Application:
- I/O
$62.29 $45.99 -
Racor Vacuum Gauge Kit T-Handle Rk19671
Racor
$153.49Racor Vacuum Gauge Kit T-Handle Rk19671 T-Handle Vacuum Gauge; -30 to 0 inHg, Bottom Mount, Stainless Steel T-handle- Part Number:
- 62-RK19671
- Availability:
- In Stock - Ships same or next business day.
$153.49 -
Seachoice Fuel Pump Cube Kit 7.0-4.0Psi 12V 20351
Seachoice
$149.21 $94.99Seachoice Fuel Pump Cube Kit 7.0-4.0Psi 12V 20351 Compatible with gasoline, diesel, biodiesel, blended alcohol fuels and fuel additives • For 12 volt systems onlyNot intended for aircraft use.Easy to install • Coast Guard...- Part Number:
- 50-20351
- Availability:
- In Stock - Ships same or next business day.
- PSI:
- 7.0 - 4.0
- GPH:
- 30
- OEM #:
- 40289
- Volts:
- 12
$149.21 $94.99 -
Seastar Control Cable 4300BC TFXtreme CCX430
Seastar
$112.29 $95.21Seastar Control Cable 4300BC TFXtreme CCX430 4300BC/43BC universal type cables for heavy duty applications with a clamp end at the control and a bulkhead end at the drive. Splined core allows easy movement and minimum lost motion. Both ends have a 1/4-28...- Part Number:
- NW-1CCX430
- Availability:
- In Stock - Ships same or next business day.
$112.29 $95.21 -
Sierra Filter-Water Separator 21M Long 18-7845
Sierra
$15.79 $13.99Sierra Filter-Water Separator 21M Long 18-7845Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH...- Part Number:
- 47-7845
- Availability:
- In Stock - Ships same or next business day.
- Type:
- Long - 4.35"
- Replaces:
- Mercury - 35-802893Q - Yamaha - ABB-FUELF-IL-TR
$15.79 $13.99 -
Sierra Ignition Coil Mc He392-805570A2 18-5438
Sierra
$76.59 $54.99Sierra Ignition Coil Mc He392-805570A2 18-5438- Part Number:
- 47-5438
- Availability:
- In Stock - Ships same or next business day.
$76.59 $54.99 -
Sold Out, please call for ETA.
Sierra Seal Kit-Injection Mpi GM Sb-Bb Gen+ 18-7696
Sierra
$7.59 $7.23Sierra Seal Kit-Injection Mpi GM Sb-Bb Gen+ 18-7696- Part Number:
- 47-7696
- Availability:
- In Stock - Ships same or next business day.
$7.59 $7.23 -
Sierra Filter-Oil Honda#15400-Pfb-014 18-7913
Sierra
$11.19 $8.83Sierra Filter-Oil Honda#15400-Pfb-014 18-7913Please see manufacturer application guide for complete application references.- Part Number:
- 47-7913
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Honda: 15400-PFB-014
Mercury: 35-822626Q1 - Q03
$11.19 $8.83 -
Sierra Filterh2O Sep-Yamaha 10M Lg 18-7866
Sierra
$23.49 $18.99Sierra Filterh2O Sep-Yamaha 10M Lg 18-7866Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH to...- Part Number:
- 47-7866
- Availability:
- In Stock - Ships same or next business day.
- Type:
- High Capacity - 6"
- Replaces:
- Yamaha - MAR-FUELF-IL-TR
$23.49 $18.99 -
Sierra Shift Cable Kit - Bravos 18-2604
Sierra
$222.09 $164.99Sierra Shift Cable Kit - Bravos 18-2604- Part Number:
- 47-2604
- Availability:
- In Stock - Ships same or next business day.
$222.09 $164.99 -
Uflex Front Seal Kit for Up Series Helms UP, UP28, UP33, UP39 (40875V)
Uflex
$44.39 $34.99Uflex Front Seal Kit-Up Series Helm 40875V- Part Number:
- 216-40875V
- Availability:
- In Stock - Ships same or next business day.
- Fits:
- UP25 - UP28 - UP33 - UP39 & UP45
$44.39 $34.99 -
Uflex Mach-14 OMC Control Cable
Uflex
$59.59 $45.69Uflex Mach-14 OMC Control Cable Heavy duty 18 laywire conduit for long life & high efficiency for smooth operation and reduced bend radius. Ideal for long complex cable runs. High resistance blue outer jacket protects against abrasion, UV and...- Part Number:
- NW-216MACH14
- Availability:
- In Stock - Ships same or next business day.
$59.59 $45.69 -
Seastar 33C SST Control Cable CC332
Seastar
$45.29 $41.16Seastar 33C SST Control Cable CC332 Stainless steel and brass fittings. Universal type cables are designed to fit aftermarket engine controls as well as OEM controls from BMW, Chrysler, Honda, Mercury Sport Jet, Nissan, Suzuki, Volvo, Yamaha, and others...- Part Number:
- NW-1CC332
- Availability:
- In Stock - Ships same or next business day.
$45.29 $41.16 -
Seastar Safe-T II No Feedback Steering Package SS132
Seastar
$358.59 $314.99Seastar Safe-T II No Feedback Steering Package SS132 Rugged, compact, lightweight, and with Seastar Solutions No FeedBack technology, this ultra-smooth 3-turn system takes the work out of steering most V-4 outboard powered boats. The Safe-T II helm is a...- Part Number:
- NW-1SS132K
- Availability:
- In Stock - Ships same or next business day.
$358.59 $314.99 -
Perko FlushPro Inboard Engine Fresh Water Flush Kit (1-1/4) 0457Dp7
Perko
$327.99 $204.99Flush Pro Valve Kit - 1-1/4"Finally! Freshwater flushing of your inboard is as simple as connecting a garden hose.Features: Polymer Stainless Steel Spring Flush your boat engine safely and easily Transparent body allows for visual inspection of...- Part Number:
- 9-0457DP7
- Availability:
- In Stock - Ships same or next business day.
- Hose:
- 1-1/4"
$327.99 $204.99 -
Racor Bowl Kit-Clr 900/3Ma-1000/3Ma Rk 11-1606-1
Racor
$112.49 $82.99Racor Bowl Kit-Clr 900/3Ma-1000/3Ma Rk 11-1606-1- Part Number:
- 62-RK1116061
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Clear Bowl with Water Sensor Plug
- Fits:
- 500/900/1000 Series
$112.49 $82.99 -
Sierra Gimbal Bearing-Omc/Vp#3853807 18-2100
Sierra
$79.39 $72.99Sierra Gimbal Bearing-Omc/Vp#3853807 18-2100OMC Sterndrive/CobraOMC Volvo- Part Number:
- 47-2100
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Merc 30-60794A4
Volvo 3853807
OMC 983937
$79.39 $72.99
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.