Aftermarket Parts
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Sold Out, please call for ETA.
Seastar Gland/Seal Kit Hc4600 Baystar Hp5607
Seastar
$218.69 $164.99Seastar Gland/Seal Kit Hc4600 Baystar Hp5607- Part Number:
- 1-HP5607
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Gland/Seal kit
- Fits:
- HC4645H/47H/48H/58H port side
$218.69 $164.99 -
Seastar Seal Kit F/Hc5318 I/B Cylinder Hs5182
Seastar
$109.49 $79.99Seastar Seal Kit F/Hc5318 I/B Cylinder Hs5182- Part Number:
- 1-HS5182
- Availability:
- In Stock - Ships same or next business day.
$109.49 $79.99 -
Seastar Seal Kit For Baystar Helm Hs5147
Seastar
$28.39 $24.99Seastar Seal Kit For Baystar Helm Hs5147- Part Number:
- 1-HS5147
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Kit for Older model BayStar helms HH4016 & HH4015 w/plastic housing
$28.39 $24.99 -
Seastar Service Kit For Seastar Helms Hp6032
Seastar
$22.89 $16.99Seastar Service Kit For Seastar Helms Hp6032- Part Number:
- 1-HP6032
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Kit for Seastar helms 1990-newer - Baystar HH4313 - HH43133-3 HH4315 - HH4315-3
$22.89 $16.99 -
Sherwood Pump Plate Cover SS For A P1700 18742
Sherwood Pump
$73.39 $53.99Sherwood Pump Plate Cover SS For A P1700 18742- Part Number:
- 762-18742
- Availability:
- In Stock - Ships same or next business day.
- Description:
- 17000 Series Stainless Steel Cover Plate
$73.39 $53.99 -
Sierra 378444 OMC Solenoid Switch 18-5807
Sierra
$40.89 $34.99Sierra 378444 OMC Solenoid Switch 18-5807- Part Number:
- 47-5807
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 378444 - Prestolite SAW4206
$40.89 $34.99 -
Sierra Alignment Tool OMC Cobra/MerCruiser 18-4442
Sierra
$203.29 $184.99Sierra Alignment Tool OMC Cobra/MerCruiser 18-4442- Part Number:
- 47-4442
- Availability:
- In Stock - Ships same or next business day.
$203.29 $184.99 -
Sierra Bolt Kit Engine Mount 18-2140
Sierra
$38.49 $29.27Sierra Bolt Kit Engine Mount 18-2140- Part Number:
- 47-2140
- Availability:
- In Stock - Ships same or next business day.
$38.49 $29.27 -
Sierra Eclipse 2 I/O Water Temp 68401P
Sierra
$73.79 $52.99Sierra Eclipse 2 I/O Water Temp 68401PSmart white and blue graphics on a black dial background; these very low profile bezels follow the curve of the lense to eliminate water trapping. Design with domed glass sheds water and resists scratching...- Part Number:
- 11-68401P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Water Temp Gauge - Inboard/Outboard
- Dial Range:
- 120 Deg --240 Deg -F
- Sender Code:
- D
$73.79 $52.99 -
Sierra Filter-Water Separator OMC 21M5 18-7846
Sierra
$15.49 $15.09Sierra Filter-Water Separator OMC 21M5 18-7846Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. All filters flow @ 90 GPH to feed even the hungriest motor.Clear Bowls: Use for outboard and above deck installations...- Part Number:
- 47-7846
- Availability:
- In Stock - Ships same or next business day.
- Type:
- 21 Micron
- Replaces:
- OMC 502905
$15.49 $15.09 -
Sierra Fuel Connector 18-8079
Sierra
$19.39 $13.65Sierra Fuel Connector 18-8079- Part Number:
- 47-8079
- Availability:
- In Stock - Ships same or next business day.
- Connector:
- Hose - Female
- Fits:
- Nissan/Suzuki/Tohatsu
- Application:
- Fits all models - mates with 18-8078
- Replaces:
- 3B2-70281-0
- Thread:
- -
- Hose:
- 3/8"
$19.39 $13.65 -
Sierra Fuel Pump Yamaha 2 Str 40 90Hp 18-7334
Sierra
$52.69 $40.90Sierra Fuel Pump Yamaha 2 Str 40 90Hp 18-7334- Part Number:
- 47-7334
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 692-24410-00-00 - 663-24410-00-00 -
6A0-24410-00-00 - 6A0-24410-05-00 -
6A0-24410-04-00 - 6A0-24410-03-00 -
6A0-24410-02-00 - 6A0-24410-01-00
$52.69 $40.90 -
Sierra Fuel Pump Yamaha 2-Stroke 115-300Hp 18-7349
Sierra
$51.69 $40.99Sierra Fuel Pump Yamaha 2-Stroke 115-300Hp 18-7349 Direct replacement for select Yamaha 2-stroke outboard fuel pumps Fits 115–300 HP models from 1984–2004 Meets or exceeds original equipment specifications for reliable performance Helps...- Part Number:
- 47-7349
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 6E5-24410-03-00 - 6E5-24410-10-00 -
6E5-24410-04-00 - 6E5-24410-02-00 -
6E5-24410-01-00 - 6E5-24410-00-00
$51.69 $40.99 -
Sierra Gasket V.C.27-806452 2.5/3.0L 18-0347
Sierra
$21.59 $18.99Sierra Gasket V.C.27-806452 2.5/3.0L 18-0347- Part Number:
- 47-0347
- Availability:
- In Stock - Ships same or next business day.
$21.59 $18.99 -
Sold Out, please call for ETA.
Sierra Gasket-Exhaust Manifold GM 4.3L 18-2909
Sierra
$11.19 $9.65Sierra Gasket-Exhaust Manifold GM 4.3L 18-2909- Part Number:
- 47-2909
- Availability:
- In Stock - Ships same or next business day.
$11.19 $9.65 -
Sierra Gasket-Head GM 7.4L 18-3877
Sierra
$84.19 $67.99Sierra Gasket-Head GM 7.4L 18-3877- Part Number:
- 47-3877
- Availability:
- In Stock - Ships same or next business day.
$84.19 $67.99 -
Sold Out, please call for ETA.
Sierra Gear Housing Seal Kit J-Evinru 18-2683
Sierra
$46.59 $33.31Sierra Gear Housing Seal Kit J-Evinru 18-2683- Part Number:
- 47-2683
- Availability:
- In Stock - Ships same or next business day.
$46.59 $33.31 -
Sierra GPS Receiver - 4Ft 68982P
Sierra
$196.39 $134.99Sierra GPS Receiver - 4Ft 68982PAntenna for GPS speedometer- Part Number:
- 11-68982P
- Availability:
- In Stock - Ships same or next business day.
- Description:
- GPS receiver
- Cable Length:
- 4'
$196.39 $134.99 -
Sierra Impeller Kit-Sherwood# 10615K 18-3047
Sierra
$50.69 $38.99Sierra Impeller Kit-Sherwood# 10615K 18-3047- Part Number:
- 47-3047
- Availability:
- In Stock - Ships same or next business day.
$50.69 $38.99 -
Sierra Lido Trim Gauge Fog Res MerCruiser 59657P
Sierra
$72.69 $61.99Sierra Lido Trim Gauge Fog Res MerCruiser 59657PFog resistant gauges comply with SAE J-1810. Black graphics on a white face with chrome ring and a black pointer with fire-orange tip. Scratch resistant curved glass lense with polished stainless steel;...- Part Number:
- 11-59657P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Trim - Mariner/Merc/Cobra/Volvo DP - SX - Yamaha 2001-Date
- Dial Range:
- Up-Down
- Sender Code:
- Engine Mfg.
$72.69 $61.99
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.