Aftermarket Parts
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Seastar No-Feedback Rotary Helm/Single Sh4910
Seastar
$217.69 $159.99Seastar No-Feedback Rotary Helm/Single Sh4910 Two bolts secure QC cable to helm One bolt holds spent travel tube. No feedback feature- Part Number:
- 1-SH4910P
- Availability:
- In Stock - Ships same or next business day.
- Type:
- Single Helm
$217.69 $159.99 -
Seastar Orb Fitting-90Deg Elbow 2Pk Hf6004
Seastar
$57.79 $52.99Seastar Orb Fitting-90Deg Elbow 2Pk Hf6004 All Older Style SeaStar manual hydraulic steering systems. These are 3/8" compression fittings which utilize a 9/16"-24 extra fine thread. (Seastar Solutions New Updated cylinders with part numbers ending in...- Part Number:
- 1-HF6004
- Availability:
- In Stock - Ships same or next business day.
- Type:
- 90 Deg - Elbow
- Material:
- Aluminum
- Bag:
- 2
$57.79 $52.99 -
Seastar Seastar Cylinder Ba 135 7 Atm Hc53133
Seastar
$956.79 $690.91Seastar Seastar Cylinder Ba 135 7 Atm Hc53133These cylinders are for single and dual rudder vessels with two axis articulation and offer easy autopilot interface. Cylinders are supplied with bleeder fittings.- Part Number:
- 1-HC53133
- Availability:
- In Stock - Ships same or next business day.
- Type:
- BA135-7ATM
- Body Dia.:
- 1.5"
- Shaft:
- .625"
$956.79 $690.91 -
Seastar Seastar Helm Backmount Kit Ha5418
Seastar
$81.89 $54.99Seastar Seastar Helm Backmount Kit Ha5418 Square backplate kit for the 5271 and 5272 SeaStar helms. Used to retrofit new Seastar standard helm into hole cutouts- Part Number:
- 1-HA5418
- Availability:
- In Stock - Ships same or next business day.
$81.89 $54.99 -
Sold Out, please call for ETA.
Seastar Throttle Knob (Red Gr00Ves) Ca69052P
Seastar
$54.79 $44.99Seastar Throttle Knob (Red Gr00Ves) Ca69052P Features both visual and tactile distinction for throttle and shift, in keeping with the latest ABYC guidelines. Handles replace CH5400P & CH5600P twin control handles. Knobs replace most other brand...- Part Number:
- 1-CA69052P
- Availability:
- In Stock - Ships same or next business day.
- Description:
- SS Grooved Throttle Knob
$54.79 $44.99 -
Seastar Tilt Helm Hps Rotary Sh91650P
Seastar
$227.89 $179.99Seastar Tilt Helm Hps Rotary Sh91650P Single cable tilt helm. For power-assisted stern drives. Requires separate tilt mechanism SH91800P.- Part Number:
- 1-SH91650P
- Availability:
- In Stock - Ships same or next business day.
$227.89 $179.99 -
Seastar Tournament 2 O/B Cyl Front Mnt Hc6845
Seastar
$1,382.89 $1,039.45Seastar Tournament 2 O/B Cyl Front Mnt Hc6845Engineered to provide today's high-powered offshore tournament boats and other high-performance vessels with precise, smooth and reliable steering. This heavy-duty cylinder is designed to work with all new and...- Part Number:
- 1-HC6845
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Outboard cylinder - front mt
$1,382.89 $1,039.45 -
Sherwood Pump Pump Seawater Kohler 5-7Kw Ge G8001
Sherwood Pump
$424.59 $319.99Sherwood Pump Pump Seawater Kohler 5-7Kw Ge G8001 Impeller Kit: 8000K- Part Number:
- 762-G8001
- Availability:
- In Stock - Ships same or next business day.
- Engine:
- Kohler 5-7 KW Diesel
- Inlet:
- 3/8" NPT
- Outlet:
- 3/8" NPT
$424.59 $319.99 -
Sierra 321794 OMC Gasket 18-0989
Sierra
$14.79 $10.99Sierra 321794 OMC Gasket 18-0989- Part Number:
- 47-0989
- Availability:
- In Stock - Ships same or next business day.
$14.79 $10.99 -
Sierra 325273 OMC Head Gasket 18-3800
Sierra
$23.49 $18.34Sierra 325273 OMC Head Gasket 18-3800- Part Number:
- 47-3800
- Availability:
- In Stock - Ships same or next business day.
$23.49 $18.34 -
Sold Out, please call for ETA.
Sierra 332-5772A7 MerCruiser Switch Box 18-5881
Sierra
$337.09 $221.07Sierra 332-5772A7 MerCruiser Switch Box 18-5881- Part Number:
- 47-5881
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Chrysler/Force/Mercury: 332-5772A7
$337.09 $221.07 -
Sierra 826493-9 Volvo Fuel Pump 18-7281
Sierra
$197.89 $154.99Sierra 826493-9 Volvo Fuel Pump 18-7281- Part Number:
- 47-7281
- Availability:
- In Stock - Ships same or next business day.
$197.89 $154.99 -
Sierra 985063 OMC Solenoid '78-'90 18-5812
Sierra
$40.99 $34.99Sierra 985063 OMC Solenoid '78-'90 18-5812- Part Number:
- 47-5812
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 985063
$40.99 $34.99 -
Sierra Brass Fitting 3/8Nptx5/8 Hose 18-8041
Sierra
$10.49 $7.93Sierra Brass Fitting 3/8Nptx5/8 Hose 18-8041NOT TO BE USED IN POTABLE WATER SYSTEMS.- Part Number:
- 47-8041
- Availability:
- In Stock - Ships same or next business day.
- Connector:
- Hose Barb - Male
- Replaces:
- -
- Thread:
- 5/8" NPT
- Hose:
- 3/8" Barb
$10.49 $7.93 -
Sierra Carb Kit Suzuki 13910-94701 18-7754
Sierra
$36.99 $29.99Sierra Carb Kit Suzuki 13910-94701 18-7754- Part Number:
- 47-7754
- Availability:
- In Stock - Ships same or next business day.
$36.99 $29.99 -
Sierra Carburetor Kit MerCruiser #3302-804845 18-7097
Sierra
$84.69 $64.99Sierra Carburetor Kit MerCruiser #3302-804845 18-7097- Part Number:
- 47-7097
- Availability:
- In Stock - Ships same or next business day.
- OEM #:
- Mercruiser 3302-804845. 3302-9437
$84.69 $64.99 -
Sierra Eclipse 2 Fuel Gauge (E-F) 68390P
Sierra
$45.99 $37.99Sierra Eclipse 2 Fuel Gauge (E-F) 68390PSmart 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:
- 11-68390P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Fuel Gauge
- Dial Range:
- (E - 1/2 - F)
- Sender Code:
- N/R
$45.99 $37.99 -
Sierra Elbow Mounting Hardware Kit 18-8505
Sierra
$35.09 $26.12Sierra Elbow Mounting Hardware Kit 18-8505- Part Number:
- 47-8505
- Availability:
- In Stock - Ships same or next business day.
$35.09 $26.12 -
Sierra Exhaust Hose 18-2779
Sierra
$48.39 $36.81Sierra Exhaust Hose 18-2779- Part Number:
- 47-2779
- Availability:
- In Stock - Ships same or next business day.
- Description:
- OMC Cobra & Volvo
- Replaces:
- 3852696
$48.39 $36.81 -
Sierra Filter-Oil Yamaha Honda Nissan 18-7911-1
Sierra
$11.49 $10.99Sierra Filter-Oil Yamahahondanissan 18-7911-1Please see manufacturer application guide for complete application references.- Part Number:
- 47-79111
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Nissan 3R0076150M. Honda 15400-PFB-007. Yamaha 5GH-13440-00-00
$11.49 $10.99
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.