Aftermarket Parts
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Sierra Fuel Pump Kit MerCruiser #21-857005A 1 18-7817
Sierra
$27.99 $20.99Sierra Fuel Pump Kit MerCruiser #21-857005A 1 18-7817- Part Number:
- 47-7817
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Chrysler/Mercury: 21-42990A7 - A8 - A9 - A10 - 21-857005A1
$27.99 $20.99 -
Sierra Gasket-Head GM 5.0L-5.7L 18-3876
Sierra
$49.59 $34.46Sierra Gasket-Head GM 5.0L-5.7L 18-3876- Part Number:
- 47-3876
- Availability:
- In Stock - Ships same or next business day.
$49.59 $34.46 -
Sierra Inlet Valve MerCruiser #1395-879194011 18-7062
Sierra
$14.09 $11.99Sierra Inlet Valve MerCruiser #1395-879194011 18-7062- Part Number:
- 47-7062
- Availability:
- In Stock - Ships same or next business day.
$14.09 $11.99 -
Sierra Mercury O/B Carburetor Kit 18-7021
Sierra
$26.99 $22.99Sierra Mercury O/B Carburetor Kit 18-7021- Part Number:
- 47-7021
- Availability:
- In Stock - Ships same or next business day.
$26.99 $22.99 -
Sierra Oil Drain Kit 1/2 -20 Thread 18-7891
Sierra
$130.39 $96.89Sierra Oil Drain Kit 1/2 -20 Thread 18-7891Total length 42 inches.- Part Number:
- 47-7891
- Availability:
- In Stock - Ships same or next business day.
- Description:
- For GM - Chrysler & Most Ford oil pans - 1/2" 20 Threads
$130.39 $96.89 -
Sierra Thermostat 142Deg-Chr Cr MerCruiser Pc 18-3551
Sierra
$21.39 $18.99Sierra Thermostat 142Deg-Chr Cr MerCruiser Pc 18-3551- Part Number:
- 47-3551
- Availability:
- In Stock - Ships same or next business day.
- Description:
- 142 Deg -
- Replaces:
- Mercury 59137 - 807252T1 Chrysler 4142885 Crusader 96319 Pleasurecraft R026002E
- Fits:
- CH190 305 - CH220 305 - CH270 350 - CH350 454 - Ford 302/351 CID Eng
$21.39 $18.99 -
CRC Marine Formula 6-56 9oz 6006
CRC
$11.79 $9.99CRC Marine Formula 6-56 9oz 6006 Drives out moisture to help start wet engines. Lubricates and protects against saltwater corrosion. Loosens rusted parts.- Part Number:
- 77-06006
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 9 oz. Spray
$11.79 $9.99 -
Martyr Anodes 3/4 Zinc Shaft Anode Cmx01
Martyr Anodes
$15.09 $7.64Martyr Anodes 3/4 Zinc Shaft Anode Cmx01Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water- Part Number:
- 194-CMX01
- Availability:
- In Stock - Ships same or next business day.
- ID:
- 3/4"
- OD:
- 2-1/8"
- Length:
- 2"
- Material:
- Zinc
$15.09 $7.64 -
Martyr Anodes Mag. Divers Dream 1/2" x 6" x 12 Cmdiverm
Martyr Anodes
$93.79 $63.99Martyr Anodes Mag. Divers Dream 1/2" x 6" x 12 Cmdiverm- Part Number:
- 194-CMDIVERM
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 12" x 6" x 1/2"
- Hole:
- 1/2" x 2" 9"
- Material:
- Magnesium
$93.79 $63.99 -
Martyr Anodes Sl Shaft Anode Cmx-4 (1-1/8 ) Cmx04Al
Martyr Anodes
$20.99 $11.99Martyr Anodes Sl Shaft Anode Cmx-4 (1-1/8 ) Cmx04Al Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water- Part Number:
- 194-CMX04AL
- Availability:
- In Stock - Ships same or next business day.
- ID:
- 1-1/8"
- OD:
- 2-1/8"
- Length:
- 2-1/8"
- Material:
- Aluminum
$20.99 $11.99 -
Sold Out, please call for ETA.
Racor Element-Replacement 900 Turbine 10M 2040N-10
Racor
$13.99 $1.30Racor Element-Replacement 900 Turbine 10M 2040N-10Waterproof, rustproof, dirtproof. Engineered to repel water and remove solid contaminants before they can damage precision engine components. Racor Aquabloc elements are available in different lengths for...- Part Number:
- 62-2040N10
- Availability:
- In Stock - Ships same or next business day.
- Micron:
- 10
- End Cap:
- Blue
- Fits:
- 900
$13.99 $1.30 -
Racor Seal Service Kit 500 Rk 15211
Racor
$73.29 $54.99Racor Seal Service Kit 500 Rk 15211- Part Number:
- 62-RK15211
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Seal Service Kit
- Fits:
- 500 Series
$73.29 $54.99 -
Sea-Dog Line Tiller Rope Spring-4 Inch 2/Cd 091814-1
SEA-DOG LINE
$11.50 $9.31Sea-Dog Line Tiller Rope Spring-4 Inch 2/Cd 091814-1- Part Number:
- 354-0918141
- Availability:
- In Stock - Ships same or next business day.
- Length:
- 5"
- Compressed:
- 6"
- Pack:
- 2
$11.50 $9.31 -
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 -
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 -
Sierra Carb Kit Mc1395-9761 1 18-7212
Sierra
$72.09 $54.99Sierra Carb Kit Mc1395-9761 1 18-7212- Part Number:
- 47-7212
- Availability:
- In Stock - Ships same or next business day.
- OEM #:
- Mercruiser 1395-97611
$72.09 $54.99 -
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 Filter-Oil Honda Bf75-Bf225 18-7909
Sierra
$10.39 $8.38Sierra Filter-Oil Honda Bf75-Bf225 18-7909Please see manufacturer application guide for complete application references.- Part Number:
- 47-7909
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Honda: 15400-P0H-305PE - 15400-POH-305 - 15400-ZJI-004 - 15400-PLM-A01PE
$10.39 $8.38 -
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
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.