Aftermarket Parts
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Sierra Seal Kit Lower Gc MerCruiser #26-89238A 2 18-2655
Sierra
$80.89 $57.25Sierra Seal Kit Lower Gc MerCruiser #26-89238A 2 18-2655Refer to Manufacturer's Application Guides for more information and complete references- Part Number:
- 47-2655
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Lower Unit Seal Kit: See Sierra's catalog for current application information.
- Replaces:
- 26-89238A2
$80.89 $57.25 -
Sold Out, please call for ETA.
Sierra Seal Kit MerCruiser #26-41365A 3 18-2697-1
Sierra
$60.19 $47.43Sierra Seal Kit MerCruiser #26-41365A 3 18-2697-1- Part Number:
- 47-26971
- Availability:
- In Stock - Ships same or next business day.
$60.19 $47.43 -
Sierra Seal Timimg Cover 18-1213
Sierra
$39.69 $28.31Sierra Seal Timimg Cover 18-1213- Part Number:
- 47-1213
- Availability:
- In Stock - Ships same or next business day.
$39.69 $28.31 -
Sierra Seal Transom OMC 911797 18-2533
Sierra
$17.29 $13.04Sierra Seal Transom OMC 911797 18-2533- Part Number:
- 47-2533
- Availability:
- In Stock - Ships same or next business day.
$17.29 $13.04 -
Sierra Sender-Temp 240F 1/8-27 Sgl St 18-5896
Sierra
$34.79 $26.05Sierra Sender-Temp 240F 1/8-27 Sgl St 18-5896- Part Number:
- 47-5896
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 12415
- Thread:
- 1/8"-27NPT
$34.79 $26.05 -
Sierra Sender-Temp 240F 3/8-18 Sgl St Ts26621
Sierra
$27.89 $20.62Sierra Sender-Temp 240F 3/8-18 Sgl St Ts26621- Part Number:
- 11-TS26621
- Availability:
- In Stock - Ships same or next business day.
- Thread:
- 3/8" - 18
- Terminal:
- 10-32 Stud
- Temp.:
- 240 Deg - F
$27.89 $20.62 -
Sierra Shift Cable Assembly 987678 King 18-2246
Sierra
$302.89 $229.99Sierra Shift Cable Assembly 987678 King 18-2246- Part Number:
- 47-2246
- Availability:
- In Stock - Ships same or next business day.
$302.89 $229.99 -
Sierra Shift Mod Kit OMC/Cobra 987738 18-5888
Sierra
$213.29 $128.28Sierra Shift Mod Kit OMC/Cobra 987738 18-5888- Part Number:
- 47-5888
- Availability:
- In Stock - Ships same or next business day.
$213.29 $128.28 -
Sierra Starter Drive MerCruiser #68575 3 18-5656
Sierra
$32.09 $28.31Sierra Starter Drive MerCruiser #68575 3 18-5656- Part Number:
- 47-5656
- Availability:
- In Stock - Ships same or next business day.
$32.09 $28.31 -
Sierra Starter Mariner Ob 18-5608
Sierra
$237.59 $223.27Sierra Starter Mariner Ob 18-5608- Part Number:
- 47-5608
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercury/Mariner 50-44415 - 50-77141 - 50-79472 - 50-44414 - 50-79472 1 - 50-893893
$237.59 $223.27 -
Sierra Starter O/B OMC #585056 18-5624
Sierra
$163.19 $157.92Sierra Starter O/B OMC #585056 18-5624- Part Number:
- 47-5624
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Johnson/Evinrude 583482 - 585056 - 586279
$163.19 $157.92 -
Sold Out, please call for ETA.
Sierra Starter Yanmar 6Lp-Dte&6Lp-Ste 18-6938
Sierra
$263.29 $22.10Sierra Starter Yanmar 6Lp-Dte&6Lp-Ste 18-6938These all NEW 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 temperature epoxy coated...- Part Number:
- 47-6938
- Availability:
- In Stock - Ships same or next business day.
- Type:
- New
- Fits:
- Yanmar
- OEM #:
- Yanmar 119773-77010
$263.29 $22.10 -
Sold Out, please call for ETA.
Sierra Starter-Honda#31200-Zw1-004 18-15061
Sierra
$283.49 $16.89Sierra Starter-Honda#31200-Zw1-004 18-15061These 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:
- 47-15061
- Availability:
- In Stock - Ships same or next business day.
- Type:
- New
- Fits:
- Honda
- OEM #:
- Honda 31200-ZW1-004
$283.49 $16.89 -
Sierra Starter-New GM Cw Bottom Strt 18-5911
Sierra
$318.59 $248.72Sierra Starter-New GM Cw Bottom Strt 18-5911Bottom mount straight across bolt patternReplaces: Mercury 50-76965A4; 50-99417A2; 50-99419A3; 50-17251A3; Replaces: OMC-981078; 982121; 983444; 983790; 985966Replaces: Volvo 834893; 855326- Part Number:
- 47-5911
- Availability:
- In Stock - Ships same or next business day.
- Type:
- New
- Rotation:
- CW
$318.59 $248.72 -
Sierra Starter-Perm Mag Ford 5.0-5.8L 18-5920
Sierra
$167.19 $145.48Sierra Starter-Perm Mag Ford 5.0-5.8L 18-5920- Part Number:
- 47-5920
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Permanent magnet - 5.0L & 5.8L Ford engines
- Application:
- OMC 987811 - 3854190 - Pleasurecraft 987811 - RRK122014 - RA122001 - Volvo 3854190
$167.19 $145.48 -
Sold Out, please call for ETA.
Sierra Stator OMC Oe# 584643 18-5877
Sierra
$471.69 $356.70Sierra Stator OMC Oe# 584643 18-5877- Part Number:
- 47-5877
- Availability:
- In Stock - Ships same or next business day.
$471.69 $356.70 -
Sold Out, please call for ETA.
Sierra Thermostat Chrys 2463441 18-3645
Sierra
$33.39 $26.99Sierra Thermostat Chrys 2463441 18-3645- Part Number:
- 47-3645
- Availability:
- In Stock - Ships same or next business day.
$33.39 $26.99 -
Sierra Thermostat Kit - Fresh Water - Vp 18-3619
Sierra
$45.89 $41.18Sierra Thermostat Kit - Fresh Water - Vp 18-3619- Part Number:
- 47-3619
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Fresh water (closed) cooling system . 4.3 - 5.0 5.7 all models 1993-current - 5.8 all models 1993-1996 - 7.4 all models 1991-2000 - 8.1 all models 2000-current - 8.2 all models 1993-2000
$45.89 $41.18 -
Sierra Thermostat Kit 18-3671
Sierra
$41.79 $28.99Sierra Thermostat Kit 18-3671- Part Number:
- 47-3671
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Thermostat Kit (142 Deg -): For many PCM - Crusaders - Indmar/MasterCraft & Marine Power V-6 & V-8
$41.79 $28.99 -
Sierra Thermostat Kit 3856961 18-3677
Sierra
$32.69 $23.52Sierra Thermostat Kit 3856961 18-3677- Part Number:
- 47-3677
- Availability:
- In Stock - Ships same or next business day.
- Description:
- T-Stat Kit (160 Deg -) : OMC 4.3l - 5.0l & 5.8l '94-'97/ 4.3HO '91-'97/5. 8EFI '93-'97 / Volvo 4.3GL/GS/Gi - 5.0FL/Fi - 5.7GL/Gi & 5.8FL/Fi/Fsi
$32.69 $23.52
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.