Aftermarket Parts
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Sierra Solenoid Seadoo Brp278-001-802 18-6859
Sierra
$62.29 $49.99Sierra Solenoid Seadoo Brp278-001-802 18-6859These all NEW solenoids meet OEM specs and are 100% OEM interchangeable so no installation modifications are required. 100% copper windings for maximum magnetic pull strength. Copper contact disc for longer...- Part Number:
- 47-6859
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Solenoid
- Fits:
- Sea-Doo
- OEM #:
- 278-001-376 - 278-001-802
$62.29 $49.99 -
Sierra Solenoid-Yamaha 115-250Hp 2-St 18-5853
Sierra
$115.79 $88.76Sierra Solenoid-Yamaha 115-250Hp 2-St 18-5853For: 2-Stroke: 115hp - 150hp. (1994-Current); 175hp (1994-2000); 200hp (1994-2005); 225hp. (1995-2004); 250hp (1990-2004).- Part Number:
- 47-5853
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 61A-81941-00-00 - 6E5-81941-11-00 -6E5 - 6E5-81941-10-00 - 6E5-81941-00-00
$115.79 $88.76 -
Sierra Solenoid-Yamaha 40-90Hp 2-St 18-5879
Sierra
$92.29 $70.76Sierra Solenoid-Yamaha 40-90Hp 2-St 18-5879For: 2-Stroke: 40hp (1984-88); 50hp (1984-88); 60hp (2001-06); 70hp. (1991-Current); 90hp. (1984-91)- Part Number:
- 47-5879
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 688-81950-10-00 - 688-81941-00-00
$92.29 $70.76 -
Sierra Starter Honda 75-150Hp 2001-10 18-6959
Sierra
$337.79 $254.54Sierra Starter Honda 75-150Hp 2001-10 18-6959These all NEW (not remanufacturered) replacement starters feature a permanent magnet design for more torque and longer life. They meet OEM specs and meet or exceed OEM output for guaranteed performance. High...- Part Number:
- 47-6959
- Availability:
- In Stock - Ships same or next business day.
- Type:
- New
- Fits:
- Honda
- OEM #:
- 31200-ZY6-003 - 31200-ZY9-003 - 31200-ZY9A-0031
$337.79 $254.54 -
Sierra Starter-GM Ford Ccw Top Rear 18-5908
Sierra
$355.49 $269.99Sierra Starter-GM Ford Ccw Top Rear 18-5908- Part Number:
- 47-5908
- Availability:
- In Stock - Ships same or next business day.
- Type:
- New
- Rotation:
- CCW
- Application:
- Top mount rear entry starter. Replaces: Mercruiser 50-76965A3 - 50-808011A1. OMC 981288 - 982195 - 984982 - 986007. Crusader 42091 - Pleasurecraft RA122009
$355.49 $269.99 -
Sierra T&T Motor-Yam 4-Wire 225-250Hp 18-6782
Sierra
$334.99 $241.19Sierra T&T Motor-Yam 4-Wire 225-250Hp 18-6782- Part Number:
- 47-6782
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Yamaha - 61A-43880-01-00 - 61A-43880-02-00
$334.99 $241.19 -
Sierra Thermostat 143 Deg -BRP #435491 18-3543
Sierra
$24.09 $19.09Sierra Thermostat 143 Deg -BRP #435491 18-3543- Part Number:
- 47-3543
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 393659 -
434841
378065
508626 - 5005440 - Application:
- 143 Deg -- 40-250hp E-tech - 6-55hp - CrossV4 -V6 -
9.9 4troke(1994-01) - 15 4Stroke (1994-01)
$24.09 $19.09 -
Sold Out, please call for ETA.
Sierra Thermostat Housing Gasket 18-0398
Sierra
$2.38Sierra Thermostat Housing Gasket 18-0398- Part Number:
- 47-0398
- Availability:
- In Stock - Ships same or next business day.
$2.38 -
Sierra Thermostat Kit-Yamaha #6H3-12411-11-00 18-3622
Sierra
$45.09 $36.99Sierra Thermostat Kit-Yamaha #6H3-12411-11-00 18-3622Items ending in "D" are Display Packaged- Part Number:
- 47-3622
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 6H3-12411-11-00
$45.09 $36.99 -
Sierra Trim Relay OMC 584416 18-5705
Sierra
$28.89 $21.99Sierra Trim Relay OMC 584416 18-57055 terminalSingle pullDouble throw12 volt- Part Number:
- 47-5705
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 582472 - 584416 - 586224
$28.89 $21.99 -
Sold Out, please call for ETA.
Sierra Valve 4-Way 1/4 Fnpt 18-1654
Sierra
$21.39 $17.24Sierra Valve 4-Way 1/4 Fnpt 18-1654- Part Number:
- 47-1654
- Availability:
- In Stock - Ships same or next business day.
- Description:
- w/o Detent
- Thread:
- 1/4" FNPT
$21.39 $17.24 -
Sierra Water Pump Kit E/J OMC#394711 18-3327
Sierra
$55.39 $44.99Sierra Water Pump Kit E/J OMC#394711 18-3327Includes: Impeller O.E.# 386084Housing O.E.# 435390Wear Plate O.E.# 318995Water Pump Cup O.E.# 324097Grommet O.E.# 302497Grommet O.E.# 327035Oil Seal O.E.# 318972 O-Ring O.E.# 303097O-Ring O.E.# 319085Pin O.E.#...- Part Number:
- 47-3327
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- OMC 394711 - 386697 - 391698
$55.39 $44.99 -
Sierra Wire Set GM 5.0L-5.7L Conv 18-8802-1
Sierra
$81.19 $64.99Sierra Wire Set GM 5.0L-5.7L Conv 18-8802-1Magnetic 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:
- 47-88021
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercruiser - 5.7L SKI - 8 cylinder - conventional ignition. OMC - 5.0L ('82-'88) - 5.7L ('82-'89) - 5.7L King cobra ('88) - 185 ('75-'80) - 200 ('79-'81) - 225 ('78) - 225 ('78 M models) - 230 ('79-'81) - 230 I/B LH & RH ('76) - 260 ('79-'81 models w
$81.19 $64.99 -
Sierra Wire-9In Hi Perf Plug-MerCruiser 18-5228-1
Sierra
$30.79 $21.99Sierra Wire-9In Hi Perf Plug-MerCruiser 18-5228-1Magnetic 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:
- 47-52281
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercury/Mariner - 9" wire
$30.79 $21.99 -
STA-BIL Fogging Oil 12oz 22001
STA-BIL
$9.40STA-BIL Fogging Oil 12oz 22001Dual corrosion system protects internal metal surfaces from rust and corrosion during storageDisplaces moistureLubricates cylindersFor all 2-cycle and 4-cycle gasoline engines- Part Number:
- 269-22001
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 12 oz.
$9.40 -
STA-BIL Gas Stabilizer 10oz 22206
STA-BIL
$9.99 $8.99STA-BIL Gas Stabilizer 10oz 22206 Keeps fuel fresh for quick, easy starts after storage Removes water according to OEM specs to prevent corrosion Cleans carburetors and fuel injectors Protects engine from gum, varnish, rust, and corrosion...- Part Number:
- 269-22206
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 10 oz.
- Treats:
- 25 gal.
$9.99 $8.99 -
Starbrite Gear Lube-Syn Blend 80W90 1Gallon 27200
Starbrite
$70.19 $61.20Starbrite Gear Lube-Syn Blend 80W90 1Gallon 27200 • Synthetic Blend for API GL-5, MT-1 service SAE J2360, Mack GO-J• For long term performance synthetics are the best choice• Special extreme pressure and anti-wear additives Recommended for...- Part Number:
- 74-27200
- Availability:
- In Stock - Ships same or next business day.
- Grade:
- 80W90
- Size:
- Gal.
$70.19 $61.20 -
Starbrite Star Tron Diesel Additive 8 Oz 93108
Starbrite
$22.59 $14.96Starbrite Star Tron Diesel Additive 8 Oz 93108 • Makes any engine run more smoothly, start more easily Eliminates & prevents carbon deposits Stabilizes fuel, greatly reduces soot & other emissions Improves cetane of old, substandard fuel 1...- Part Number:
- 74-93108
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 8 oz.
- Treats:
- 256 gal.
$22.59 $14.96 -
Trident Hose Fiberglass Tube Conn 3-1/2 2603121
Trident Hose
$56.79 $33.59Trident Hose Fiberglass Tube Conn 3-1/2 2603121For exhaust hose, elbows, hump hose & reducers. Fire retardant/heat resistant USA made (install minimum 2' downstream from point of cooling water injection.) 200°, max continuous operating temperatures.- Part Number:
- 606-2603121
- Availability:
- In Stock - Ships same or next business day.
- OD:
- 3-1/2"
- Length:
- 4"
$56.79 $33.59 -
Uflex Connect Kit/C14 Cable To Engn K51
Uflex
$20.29 $15.99Uflex Connect Kit/C14 Cable To Engn K51- Part Number:
- 216-K51
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Kit to connect C14 OMC to B89/90 control
$20.29 $15.99
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.