Aftermarket Parts
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Martyr Anodes 8X4X3/4 Hull Anode Cmzhc5Az
Martyr Anodes
$76.99 $41.33Martyr 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
$76.99 $41.33 -
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 performance and long life. •?Triple gasket sealing...- 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 Bp8Hs-10 Spark Plug 3823
NGK Spark Plugs
$5.89 $4.13NGK Spark Plugs Bp8Hs-10 Spark Plug 3823 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-BP8HS10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3823
- Pkg.:
- Boxed
- What's in the Box:
- (1) Spark Plug
$5.89 $4.13 -
Sold Out, please call for ETA.
OEM MerCruiser Power Trim Pump Harness Adapter 84-865771A02
Mercury Marine / Quicksilver
$16.82 $15.99OEM MerCruiser Power Trim Pump Harness Adapter 84-865771A02 This adapter will adapt from old style round 3 prong to the new style flat plug This trim adapter converts the traditional Mercury trim plug to the Delphi connector Please confirm...- Part Number:
- 710-84-865771A02
- Availability:
- In Stock - Ships same or next business day.
$16.82 $15.99 -
Sold Out, please call for ETA.
Racor Filter Optimax/Verado 2Mic 2Pk 31871
Racor
$78.19 $54.99Racor 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 particulates Meets or exceeds OEM...- Part Number:
- 62-31871
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercury 35-884380T or 35-8M0020349
- Pack:
- 2
$78.19 $54.99 -
Racor Replacement Heat Deflector 500Ma Rk 15104
Racor
$151.59 $119.99Racor Replacement Heat Deflector 500Ma Rk 15104- Part Number:
- 62-RK15104
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Heat Deflector Shield Kit (includes # RK11340 Drain Fitting O-ring Kit & RK111910 Drain Fitting Kit)
- Fits:
- 500MA Series
$151.59 $119.99 -
Seastar Ball Knob Red 4009912
Seastar
$19.99 $18.99Seastar 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
$19.99 $18.99 -
Seastar Control Cable 3600 Merc TFXtreme CCX630
Seastar
$98.69 $72.62Seastar Control Cable 3600 Merc TFXtreme CCX630 Fits Mercury Sport Jets. Cable has a 10-32 threaded terminal at control end and Mercury type engine end. The splined, coated core minimizes lost motion and offers maximum smoothness for complex and/or long...- Part Number:
- NW-1CCX630
- Availability:
- In Stock - Ships same or next business day.
$98.69 $72.62 -
Sold Out, please call for ETA.
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 on lower horsepower outboard engines. Built in the...- 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 -
Sold Out, please call for ETA.
Seastar Power Assist Unit-Seastar 12V Pa1200-2
Seastar
$2,694.99Seastar Power Assist Unit-Seastar 12V Pa1200-2 The SeaStar Power Assist unit virtually eliminates all steering loads on the wheel and reduces steering effort in heavy or high torque applications to reduce driver fatigue and discomfort, just like in a car...- Part Number:
- 1-PA12002
- Availability:
- In Stock - Ships same or next business day.
- Description:
- 12/24V with 15' Harness
$2,694.99 -
Sierra 46-96148A8/46-42579A3 Kit/Base 18-3319
Sierra
$81.89 $62.99Sierra 46-96148A8/46-42579A3 Kit/Base 18-3319- Part Number:
- 47-3319
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 46-42579A4
$81.89 $62.99 -
Sierra Fuel Filter 18-7865
Sierra
$17.99 $13.99Sierra Fuel Filter 18-7865- Part Number:
- 47-7865
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Repl. Filter
- Replaces:
- Yamaha MAR-MINIF-IL-TR
- Size:
- 10 Micron
$17.99 $13.99 -
Sierra Gasket-Exhaust Manifold GM7.4-8.2L 18-0418
Sierra
$21.09 $16.79Sierra Gasket-Exhaust Manifold GM7.4-8.2L 18-0418- Part Number:
- 47-0418
- Availability:
- In Stock - Ships same or next business day.
$21.09 $16.79 -
Sold Out, please call for ETA.
Sierra Gasket-Water Pump GM 4.3L-5.7L 18-0891
Sierra
$1.81Sierra Gasket-Water Pump GM 4.3L-5.7L 18-0891- Part Number:
- 47-0891
- Availability:
- In Stock - Ships same or next business day.
$1.81 -
Sierra OMC 3854270 Cobra Transom Seal Bellows Kit 18-2771
Sierra
$318.99 $205.99Service 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 without cone clutch Kit contains out drive...- Part Number:
- 47-2771
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 3854270
$318.99 $205.99 -
Sierra Wire 7In Plug Mercury/Force 18-8819-1
Sierra
$25.19 $18.99Sierra Wire 7In Plug Mercury/Force 18-8819-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...- Part Number:
- 47-88191
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Chrysler/Force/Mercury/Mariner - 7" wire
$25.19 $18.99 -
Sierra Wire Set-Cr 7.4-8.2Xl Str Boot 18-8844-1
Sierra
$92.59 $71.20Sierra Wire Set-Cr 7.4-8.2Xl Str Boot 18-8844-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...- Part Number:
- 47-88441
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Crusader 454/502 XL Series (straight boot on plug end)
$92.59 $71.20 -
Sierra Wire-9In Hi Perf Plug-Om582365 18-5231-1
Sierra
$22.39 $16.99Sierra Wire-9In Hi Perf Plug-Om582365 18-5231-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...- Part Number:
- 47-52311
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Johnson/Evinrude - 9" wire
$22.39 $16.99 -
On Sale
Starbrite Do-It-Yourself Marine Boat Winterizing and Descaling Kit 35001
Starbrite
$96.19 $62.99Starbrite 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 keep your engine running cool• All...- Part Number:
- 74-35001
- Availability:
- In Stock - Ships same or next business day.
$96.19 $62.99 -
Centek 4" Dynamax Muffler 1005003
Centek
$425.19 $309.99Centek 4" Dynamax Muffler 1005003 For use where there is a shortage of space or V Drive applications. For Gas/Diesel fuel type. For above the waterline only.- Part Number:
- 383-1005003
- Availability:
- In Stock - Ships same or next business day.
- Ports:
- 4"
- Dia.:
- 16-3/4"
- Length:
- 6.38"
$425.19 $309.99
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.