Aftermarket Parts
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Sold Out, please call for ETA.
Sierra Lower Unit Seal Kit V6'S 18-8335
Sierra
$35.29 $1.30Sierra Lower Unit Seal Kit V6'S 18-8335- Part Number:
- 47-8335
- Availability:
- In Stock - Ships same or next business day.
$35.29 $1.30 -
Sold Out, please call for ETA.
Sierra Lube Tube Impt 18-9787
Sierra
$35.89 $25.47Sierra Lube Tube Impt 18-9787Flush and fill tool for small gearcase requiring the 10 oz. tube. Ideal for "do-it-yourself" in home maintenance. Includes appropriate lower unit fitting for specific applications.- Part Number:
- 47-9787
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Import
$35.89 $25.47 -
Sierra Magnetic Drain Screw 18-2374
Sierra
$20.89 $16.36Sierra Magnetic Drain Screw 18-2374- Part Number:
- 47-2374
- Availability:
- In Stock - Ships same or next business day.
- Fits:
- OEM # Yamaha: 688-45341-00-00 - 688-45341-10-00
- Drain Screw:
- Magnetic Drain Screw
$20.89 $16.36 -
Sold Out, please call for ETA.
Sierra Manifold 1964
Sierra
$24.00Sierra Manifold 1964Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1964
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- CHV-1-83
- Application:
- GM Small Block (V8) 305-350 cu. in.
$24.00 -
Sold Out, please call for ETA.
Sierra Manifold 3.0 1982-95 Mp0993000 18-1954-1
Sierra
$24.00Sierra Manifold 3.0 1982-95 Mp0993000 18-1954-1Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-19541
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercrusier 95862A5
- Application:
- Most late model 2.5L - 153 CID and 3.0L - 181 CID with Rochester carb 5 bolt pattern ('83-'89).
Mounting kit included. Uses gasket 1204 and end plate 4009
$24.00 -
Sold Out, please call for ETA.
Sierra Manifold 7.4-8.2L Mp#0991-100 18-1957-1
Sierra
$0.00Sierra Manifold 7.4-8.2L Mp#0991-100 18-1957-1Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-19571
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Marine Power 0991-100
- Application:
- Port & Starboard center rise with gaskets - most Marine Power GM 7.4 L - 8.2L - V8 big blocks & others.
Use gasket 0418 and mounting kit 8532
$0.00 -
Sold Out, please call for ETA.
Sierra Manifold End Cap Gasket 18-2883-1
Sierra
$1.99 $1.30Sierra Manifold End Cap Gasket 18-2883-1- Part Number:
- 47-28831
- Availability:
- In Stock - Ships same or next business day.
$1.99 $1.30 -
Sierra Manifold Plate Block Off 18-1917
Sierra
$27.39 $21.24Sierra Manifold Plate Block Off 18-1917- Part Number:
- 47-1917
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Crusader 97296
- Application:
- Crusader Stainless steel - small block V8 - 305-350 cid (models 220 & 270) - GM big block V8 - 454 cid (models CH350 & 454XL). Use with gasket 0309 - 0305
$27.39 $21.24 -
Sold Out, please call for ETA.
Sierra Manifold-Exhaust Pcm Ford 5.0-5.8L 18-1996
Sierra
$466.59 $347.22Sierra Manifold-Exhaust Pcm Ford 5.0-5.8L 18-1996Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1996
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Pleasurecraft RO28001
- Application:
- Port & Starboard center dump manifold - Ford small block V8 - 302 & 351 cid.
Use with manifold 0183 - mounting kit 8503
$466.59 $347.22 -
Sierra Manifold-GM 4.3L V6 Vp#856894 18-1932
Sierra
$388.09 $313.16Sierra Manifold-GM 4.3L V6 Vp#856894 18-1932Sierra manifolds are painted; packaged and leak tested.- Part Number:
- 47-1932
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Volvo 856894
- Application:
- Port & Starboard - 4.3L AQ175 - AQ430 - AQ431A - AQ431B - AQ432 - AQ434.
Uses manifold gasket 2909
$388.09 $313.16 -
Sierra Marine Mercruiser Ford Small Block Water Pump V8 18-3584 18-3584-1
Sierra
$283.09 $229.99Sierra 35841 Ford Small Block Water PumpReplaces: Mercruiser bi-directional brass impeller & stainless steel back plateFor Ford V-8 engines- Part Number:
- 47-35841
- Availability:
- In Stock - Ships same or next business day.
$283.09 $229.99 -
Sold Out, please call for ETA.
Sierra Matrix Fuel-Primary Tank 2In 70003D
Sierra
$0.00Sierra Matrix Fuel-Primary Tank 2In 70003DThese Canbus driven gauges operate on either Smartcraft or NMEA 2000 systems; just select the system on your engine. The LCD on the Tachometer and Speedo display all available data and alarms; while 2" gauges...- Part Number:
- 11-70003D
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Fuel Primary
- Size:
- 2"
- Dial Range:
- E-1/4-1/2-3/4 - F
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Fuel-Secondary Tank 2In 69992D
Sierra
$0.00Sierra Matrix Fuel-Secondary Tank 2In 69992DThese Canbus driven gauges operate on either Smartcraft or NMEA 2000 systems; just select the system on your engine. The LCD on the Tachometer and Speedo display all available data and alarms; while 2" gauges...- Part Number:
- 11-69992D
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Fuel Secondary
- Size:
- 2"
- Dial Range:
- E-1/4-1/2-3/4 - F
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Harness 8In For All 2In 69999K
Sierra
$0.00Sierra Matrix Harness 8In For All 2In 69999K- Part Number:
- 11-69999K
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Harness - Any 2" gauge to another - 8"
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Harness Speedo-Tach 48 69997K
Sierra
$0.00Sierra Matrix Harness Speedo-Tach 48 69997K- Part Number:
- 11-69997K
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Harness - Tachometer to Speedometer
- Size:
- 48"
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Harness-Tach 30 Nmea2K 69996K
Sierra
$0.00Sierra Matrix Harness-Tach 30 Nmea2K 69996K- Part Number:
- 11-69996K
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Harness - Tachometer to NMEA
- Size:
- 30"
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Harness-Tach 30 Smartc 69995K
Sierra
$0.00Sierra Matrix Harness-Tach 30 Smartc 69995K- Part Number:
- 11-69995K
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Harness - Tachometer to Smartcraft
- Size:
- 30"
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Oil Pressure 2In 70005D
Sierra
$0.00Sierra Matrix Oil Pressure 2In 70005DThese Canbus driven gauges operate on either Smartcraft or NMEA 2000 systems; just select the system on your engine. The LCD on the Tachometer and Speedo display all available data and alarms; while 2" gauges receive...- Part Number:
- 11-70005D
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Oil Pressure
- Size:
- 2"
- Dial Range:
- 0-80
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Speedometer 70002D
Sierra
$0.00Sierra Matrix Speedometer 70002DThese Canbus driven gauges operate on either Smartcraft or NMEA 2000 systems; just select the system on your engine. The LCD on the Tachometer and Speedo display all available data and alarms; while 2" gauges receive data...- Part Number:
- 11-70002D
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Speedometer
- Size:
- 3"
- Dial Range:
- 0-90
$0.00 -
Sold Out, please call for ETA.
Sierra Matrix Tachometer Plug When No Speed 69998K
Sierra
$0.00Sierra Matrix Tachometer Plug When No Speed 69998K- Part Number:
- 11-69998K
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Terminator - Needed when no speedometer is used
$0.00
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.