Aftermarket Parts
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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 -
Sold Out, please call for ETA.
Sierra Thermostat Kit- Volvo Penta 18-3617
Sierra
$43.19 $42.20Sierra Thermostat Kit- Volvo Penta 18-3617- Part Number:
- 47-3617
- Availability:
- In Stock - Ships same or next business day.
- Application:
- 8.1L Raw Water Cooled Engine (160 Deg -)
$43.19 $42.20 -
Sierra Thermostat Kit-MerCruiser #807252Q 4 18-3668D
Sierra
$47.39 $35.61Sierra Thermostat Kit-MerCruiser #807252Q 4 18-3668D- Part Number:
- 47-3668D
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Display Package
- Replaces:
- 807252T4 - 807252Q4
$47.39 $35.61 -
Sierra Thermostat MerCruiser #1458686 18-3549
Sierra
$30.89 $24.99Sierra Thermostat MerCruiser #1458686 18-3549- Part Number:
- 47-3549
- Availability:
- In Stock - Ships same or next business day.
- Description:
- 120 Deg -
- Replaces:
- Mercury/Mercruiser 14586
- Fits:
- Mariner: 6 -8 -9.9 (2 cyl.) A197112 Later - Sea Pro 10 D038000 Later - 15 (2 cyl.) B292414 Later - 18XD - 20XD - 25XD B114231 Later - 25 ( 2 cyl.) 25 Sea Pro B238464 Later - 30 (2 cyl.) G055314 Later - 45 Jet - 50 - 55 - 60 (3 cyl.) G290585 Later
$30.89 $24.99 -
Sierra Tilt Motor Om 2Wire 382138 18-6754
Sierra
$265.99 $209.99Sierra Tilt Motor Om 2Wire 382138 18-6754- Part Number:
- 47-6754
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Prestolite ETK 4102 - ETK 4001 - ETK 4101 (All Models 1963-77)
- Replaces:
- OMC - 382138 - Prestolite - ETK 4001 - ETK 4101 - ETK 4102
$265.99 $209.99 -
Sierra Tilt Motor-OMC 982706 18-6755
Sierra
$232.69 $189.98Sierra Tilt Motor-OMC 982706 18-6755- Part Number:
- 47-6755
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Prestolite EVD 4001 - EVD 4002 (All Models Except 2.5L - 3.0L - 1978-85)
- Replaces:
- OMC - 982058 - 982706 - Prestolite - EVD4001 - EVD4002
$232.69 $189.98 -
Sierra Tilt-Trim Motor- Om-Vp#3853945 18-6779
Sierra
$234.59 $199.16Sierra Tilt-Trim Motor- Om-Vp#3853945 18-6779- Part Number:
- 47-6779
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- OMC - 986280 - 3853945 - Volvo - 3853945 - 986280
$234.59 $199.16 -
Sold Out, please call for ETA.
Sierra Tilt-Trim Motor-Volvo#850834 18-6758
Sierra
$238.29 $186.84Sierra Tilt-Trim Motor-Volvo#850834 18-6758- Part Number:
- 47-6758
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Volvo - 850834
$238.29 $186.84 -
Sierra Tilt-Trim Motor-Ym6G5438800200 18-6760
Sierra
$252.19 $196.09Sierra Tilt-Trim Motor-Ym6G5438800200 18-6760- Part Number:
- 47-6760
- Availability:
- In Stock - Ships same or next business day.
$252.19 $196.09 -
Sierra Timing Light 18-9802
Sierra
$246.99 $186.76Sierra Timing Light 18-9802Self-powered; accurate up to 10;000 RPM's.- Part Number:
- 47-9802
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercury 91-99379
$246.99 $186.76 -
Sierra Tps Vp#3855296 MerCruiser #803148 18-7757
Sierra
$120.99 $91.99Sierra Tps Vp#3855296 MerCruiser #803148 18-7757- Part Number:
- 47-7757
- Availability:
- In Stock - Ships same or next business day.
$120.99 $91.99 -
Sierra Trim Bracket Floor Mount SS 18-6750
Sierra
$189.29 $145.42Sierra Trim Bracket Floor Mount SS 18-6750For 1983 and later MerCruiser applications without "quick connect"- Part Number:
- 47-6750
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Trim Bracket - Stainless Steel. Floor mnt.
- Replaces:
- 862548A1 - 42419A1
$189.29 $145.42 -
Sierra Trim Bracket Floor Mount Steel 18-6749
Sierra
$149.19 $105.62Sierra Trim Bracket Floor Mount Steel 18-6749For 1983 and later MerCruiser applications without "quick connect"- Part Number:
- 47-6749
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Trim Bracket - Metal. Floor mnt.
- Replaces:
- 862548A1 - 42419A1
$149.19 $105.62
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.