Aftermarket Parts
-
Seachoice Anti-Syphon Valve 1/4Nptx3/8 20991
Seachoice
$14.85 $12.99Seachoice Anti-Syphon Valve 1/4Nptx3/8 20991 Coast Guard industry standards require anti-siphon protection on all gasoline powered boatsThis valve combines anti-syphon protection with a convenient hose barb designMade of corrosion resistant aluminum.- Part Number:
- 50-20991
- Availability:
- In Stock - Ships same or next business day.
- Thread:
- 1/4" NPT
- Hose:
- 3/8" ID
$14.85 $12.99 -
Seachoice Fuel Line Valve-3 Way- 3/8 20761
Seachoice
$37.94 $29.99Seachoice Fuel Line Valve-3 Way- 3/8 20761 Female ports • Brass • Positive lock with audible click- Part Number:
- 50-20761
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 3/8" x 3/8" x 3/8" NPT
$37.94 $29.99 -
Seastar Back Mount Rack Tilt Helm Sh91610P
Seastar
$147.79 $114.99Seastar Back Mount Rack Tilt Helm Sh91610P Back mount single-cable rack & pinion helm. Requires separate tilt mechanism SH91800P.- Part Number:
- 1-SH91610P
- Availability:
- In Stock - Ships same or next business day.
$147.79 $114.99 -
Seastar Solutions Stainless Steel Replacement Control Lever Handle 50010 Ca69060P
Seastar
$116.99 $89.99Seastar Solutions Stainless Steel Replacement Control Lever Handle 50010 Ca69060P Replacement Stainless Steel Lever fits Teleflex CH5600 SLT and Morse Twin SR controls onlyFEATURES Material: Stainless Steel- Part Number:
- 1-CA69060P
- Availability:
- In Stock - Ships same or next business day.
- Description:
- SS Replacement Lever
$116.99 $89.99 -
Sherwood Pump Pump-Engine-Kohler G910P
Sherwood Pump
$481.39 $349.99Sherwood Pump Pump-Engine-Kohler G910P Impeller Kit: 9000K- Part Number:
- 762-G910P
- Availability:
- In Stock - Ships same or next business day.
- Engine:
- Ford & Kohler
- Pulley:
- w/o Pulley
- Inlet:
- 3/8" NPT
- Outlet:
- 3/8" NPT
$481.39 $349.99 -
Sierra Eng Coupler MerCruiser 55 1446 18-2171
Sierra
$335.59 $255.92Sierra Eng Coupler MerCruiser 55 1446 18-2171- Part Number:
- 47-2171
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Replaces: 76850A2 - For all GM engines except MR/ALPHA/BRAVO with "Triangular" - 3-Bolt coupler
$335.59 $255.92 -
Sierra Flush Kit-Dual Water Pu Merc-Ete 18-9895
Sierra
$52.49 $43.99Sierra Flush Kit-Dual Water Pu Merc-Ete 18-9895Replaces: Mercury/Evinrude 881150K1- Part Number:
- 47-9895
- Availability:
- In Stock - Ships same or next business day.
- Fits:
- Mercury and E-Tec Engine with Nose Cone Dual Water Pickup.
$52.49 $43.99 -
Sierra Gasket-Valve Cover GM5.0L-5.7L 18-0664
Sierra
$34.39 $25.50Sierra Gasket-Valve Cover GM5.0L-5.7L 18-0664- Part Number:
- 47-0664
- Availability:
- In Stock - Ships same or next business day.
$34.39 $25.50 -
Sierra P Coil OMC 583737/584561 18-5176
Sierra
$59.99 $39.99Sierra P Coil OMC 583737/584561 18-5176Please see Sierra's application guides for complete application references.- Part Number:
- 47-5176
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Coil Kit: Fits 1979 Evinrude 115HP. Replaces Johnson/Evinrude OB #582366 - 587737 - 584561 - 582106 - 582330
$59.99 $39.99 -
Sierra Thermostat Kit-Yam 115-225Hp 18-3608
Sierra
$32.99 $27.99Sierra Thermostat Kit-Yam 115-225Hp 18-3608Items ending in "D" are Display Packaged- Part Number:
- 47-3608
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 6E5-12411-30-00 (Includes Gasket - 688-12414-A1-00)
$32.99 $27.99 -
Camco DIY RV Boat Marine Winterize Engine Anti-freeze Flush System KIT 65501
Camco
$72.99 $52.99Camco DIY RV Boat Marine Winterize Engine Anti-freeze Flush System KIT 65501Quickly and efficiently service inboard/outboard marine engines. The Do-It-Yourself Winterizer allows flushing and preparation of boat engine for winter storage with just five...- Part Number:
- 117-65501
- Availability:
- In Stock - Ships same or next business day.
$72.99 $52.99 -
Centek Muffler-Minimax 3X3 1050300
Centek
$391.99 $289.99Centek Muffler-Minimax 3X3 1050300 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:
- 383-1050300
- Availability:
- In Stock - Ships same or next business day.
- Ports:
- 3"
- Dia.:
- 6.38"
- Length:
- 13.75"
$391.99 $289.99 -
Centek Replacement Filter For Bk-1 8Bf11R
Centek
$101.59 $79.99Centek Replacement Filter For Bk-1 8Bf11R Replacement filter cartridge filters bilge water discharge to remove hydrocarbons.- Part Number:
- 383-8BF11R
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Replacement Filter
- Capacity:
- 25 GPM
- Fits:
- 8BK1
- Length:
- 10"
$101.59 $79.99 -
Martyr Anodes Rud Anode Cmr4 5 Cmr04Al
Martyr Anodes
$35.59 $22.99Martyr Anodes Rud Anode Cmr4 5 Cmr04Al Zinc: For use in salt waterAluminum: For use in brackish waterMagnesium: For use in fresh water- Part Number:
- 194-CMR04AL
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 5" dia. x 5/8"
- Material:
- Aluminum
$35.59 $22.99 -
NGK Spark Plugs 3133 Spark Plug 3133
NGK Spark Plugs
$20.39 $12.99NGK Spark Plugs 3133 Spark Plug 3133 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-BPZ8HS10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3133
- Pkg.:
- Boxed
- What's in the Box:
- (1) Spark Plug
$20.39 $12.99 -
Sea-Dog Line Gas Tank Vent Nylon White 357105-1
SEA-DOG LINE
$7.25 $6.99Sea-Dog Line Gas Tank Vent Nylon White 357105-1- Part Number:
- 354-3571051
- Availability:
- In Stock - Ships same or next business day.
- Material:
- White Nylon
- A:
- 1"
- B:
- 2-1/8"
- C:
- 5/8"
- D:
- 1-1/8"
$7.25 $6.99 -
Seachoice Adj Fuel Tank Sender-4-24" 15471
Seachoice
$61.21 $43.99Seachoice Adj Fuel Tank Sender-4-24" 15471 Can be used for gas or dieselMade of non-ferrous materials and compatible with 35 (full) to 240 (empty) ohm gaugesMounting screws and gasket includedFloat arm can be rotated in 90°, intervals to assure...- Part Number:
- 50-15471
- Availability:
- In Stock - Ships same or next business day.
- Tank Depth:
- 4" to 24"
$61.21 $43.99 -
Seachoice Alpha One Gen 2 Kit Mg Freshwater 50-95031
Seachoice
$123.48 $80.41Seachoice Alpha One Gen 2 Kit Mg Freshwater 50-95031 Cadmium free, environmentally friendly. • Aluminum: For salt and brackish waterConform to: Mil-Spec A-24779(SH) • Magnesium: For freshwater onlyConform to: Mil-Spec...- Part Number:
- 50-95031
- Availability:
- In Stock - Ships same or next business day.
- Material:
- Magnesium
$123.48 $80.41 -
Seachoice Steering Cable Protector 28301
Seachoice
$11.07 $9.99Seachoice Steering Cable Protector 28301 Heavy-duty rubber boot to fit over output end of steering cable at engine for complete protection from elements and preventing lubrication from being washed awayFits all standard steering cables including Morse,...- Part Number:
- 50-28301
- Availability:
- In Stock - Ships same or next business day.
$11.07 $9.99 -
Seastar Orb Fitting-Straight 2Pk Hf6009
Seastar
$40.79 $32.99Seastar Orb Fitting-Straight 2Pk Hf6009 These fittings fit updated Seastar cylinders and all helm pump to use O-Ring (ORB) type fittings. Before the update all Seastar Solutions helms used NPT fittings. These 316 stainless steel fittings will simplify...- Part Number:
- 1-HF6009
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Straight ORB fitting
- Fits:
- Helms
- Bag:
- 2
$40.79 $32.99
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.