Aftermarket Parts
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Sierra Rotor-Westerbeke# 40860 23-2802
Sierra
$8.53Sierra Rotor-Westerbeke# 40860 23-2802- Part Number:
- 47-232802
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Westerbeke 40860
- Fits:
- 20.0 BEG(60Hz)/16.0 BEG(50Hz) - 25.0 BEG(60Hz)/20.0 BEG(50Hz) - 20.0 SBEG(60Hz) / 16.0 SBEG(50Hz) - 20.0 SBEGA(60Hz) / 16.0 SBEG(50Hz) - 22.5 SBEG(60Hz) / 18.7 SBEG(50Hz) - 22.5 SBEGA(60Hz) / 18.7 SBEGA(50Hz)
$8.53 -
Sierra Rotor-Westerbeke# 43050 23-2803
Sierra
$7.68Sierra Rotor-Westerbeke# 43050 23-2803- Part Number:
- 47-232803
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Westerbeke 43050
- Fits:
- 4.5 BCGB(60Hz)/3.75 BCGB(50Hz) - 4.5 BCGTC(60Hz)/3.75 BCGTC(50Hz) - 5.0 BCG(60Hz)/4.2 BCG(50HZ) - 5.0 BCGA(60Hz)/5.2 BCGA(50Hz) - 7.0 BCGB(60Hz)/6.0 BCGB(50Hz) - 7.0 BCGC(60Hz)/5.9 BCGC(50Hz) - 7.2 BCGTC(60Hz)/6.0 BCGTC(50Hz) - 8.0 BEG(60Hz)/6.4 BEG(
$7.68 -
Sold Out, please call for ETA.
Sierra Rubber Ring 18-0184
Sierra
$37.29 $1.30Sierra Rubber Ring 18-0184- Part Number:
- 47-0184
- Availability:
- In Stock - Ships same or next business day.
$37.29 $1.30 -
Sold Out, please call for ETA.
Sierra Rubber Seal 18-2536
Sierra
$13.79 $9.10Sierra Rubber Seal 18-2536- Part Number:
- 47-2536
- Availability:
- In Stock - Ships same or next business day.
$13.79 $9.10 -
Sold Out, please call for ETA.
Sierra Rubber Seal 18-2937
Sierra
$6.79 $6.05Sierra Rubber Seal 18-2937- Part Number:
- 47-2937
- Availability:
- In Stock - Ships same or next business day.
$6.79 $6.05 -
Sold Out, please call for ETA.
Sierra Rubber Seal 829714 18-2934
Sierra
$7.39 $1.30Sierra Rubber Seal 829714 18-2934- Part Number:
- 47-2934
- Availability:
- In Stock - Ships same or next business day.
$7.39 $1.30 -
Sierra Rubber Seal Om324937 55-074 18-2537
Sierra
$11.29 $8.76Sierra Rubber Seal Om324937 55-074 18-2537- Part Number:
- 47-2537
- Availability:
- In Stock - Ships same or next business day.
$11.29 $8.76 -
Sold Out, please call for ETA.
Sierra Sahara Speedo Head Only80 Mph 63076Ph
Sierra
$0.00Sierra Sahara Speedo Head Only80 Mph 63076PhBlack graphics on a tan dial background light red at night. Very low profile bezels follow the curve of the lens to eliminate water "trapping". Pointers are black with a fire-orange tip. Perimeter and...- Part Number:
- 11-63076PH
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 3"
- Type:
- Speedometer Head Only
- Dial Range:
- 20-80 mph
- Sender Code:
- G
$0.00 -
Sold Out, please call for ETA.
Sierra Sahara System Check Tachometer 61901P
Sierra
$333.69 $1.30Sierra Sahara System Check Tachometer 61901PBlack graphics on a tan dial background light red at night. Very low profile bezels follow the curve of the lens to eliminate water "trapping". Pointers are black with a fire-orange tip. Perimeter and...- Part Number:
- 11-61901P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 3"
- Type:
- Tach systems check. Evinrude
- Dial Range:
- 0-7000 rpm OB Alt or Coil
$333.69 $1.30 -
Sold Out, please call for ETA.
Sierra Sahara-2Nd Eng Gauge Set-Ib 69717P
Sierra
$0.00Sierra Sahara-2Nd Eng Gauge Set-Ib 69717PBlack graphics on a Tan dial background light Red at night. Very low profile bezels follow the curve of the lens to eliminate water "trapping". Pointers are Black with a Fire-Orange tip. Perimeter and through-dial...- Part Number:
- 11-69717P
- Availability:
- In Stock - Ships same or next business day.
- Type:
- Inboard 4 Gauge Set - Tach (to 7 -000 rpm) - Voltmeter (8-18 VDC 12-volt systems) - Oil Pressure (0-80 psi) - Water Temp (120 Deg --240 Deg -F)
- Sender Code:
- F
$0.00 -
Sold Out, please call for ETA.
Sierra Screw 18-3135
Sierra
$0.00Sierra Screw 18-3135- Part Number:
- 47-3135
- Availability:
- In Stock - Ships same or next business day.
$0.00 -
Sold Out, please call for ETA.
Sierra Screw Brg.Carrier 18-2379
Sierra
$10.39 $1.30Sierra Screw Brg.Carrier 18-2379- Part Number:
- 47-2379
- Availability:
- In Stock - Ships same or next business day.
$10.39 $1.30 -
Sold Out, please call for ETA.
Sierra Screw Lock 18-4238
Sierra
$10.89 $10.63Sierra Screw Lock 18-4238- Part Number:
- 47-4238
- Availability:
- In Stock - Ships same or next business day.
$10.89 $10.63 -
Sierra Screwdrain/Fill OMC 307551 18-2387
Sierra
$11.79 $8.13Sierra Screwdrain/Fill OMC 307551 18-2387- Part Number:
- 47-2387
- Availability:
- In Stock - Ships same or next business day.
- Fits:
- Johnson/Evinrude - 60-75 hp - 3 cylinder - 20-35 hp ('85-'97) - OMC Sterndrive/Cobra - V4 & V6 ('79 & Newer) - OEM # 307551
- Drain Screw:
- Gasket
$11.79 $8.13 -
Sierra Screwmagn.Drain OMC 318544 18-2378
Sierra
$18.19 $13.81Sierra Screwmagn.Drain OMC 318544 18-2378- Part Number:
- 47-2378
- Availability:
- In Stock - Ships same or next business day.
- Fits:
- Johnson/Evinrude - Cobra 2.3 - 3.0 - 3.8 & 5.8L ('86-'92) - V4 & V6 ('79 & Newer) - 60-75 hp - 3 cylinder - 40-50 hp ('89-'98). OEM # 318544
- Drain Screw:
- Magnetic Drain Screw
$18.19 $13.81 -
Sold Out, please call for ETA.
Sierra Seal 18-2024
Sierra
$15.09 $1.30Sierra Seal 18-2024- Part Number:
- 47-2024
- Availability:
- In Stock - Ships same or next business day.
$15.09 $1.30 -
Sold Out, please call for ETA.
Sierra Seal 18-2933
Sierra
$4.99 $3.28Sierra Seal 18-2933- Part Number:
- 47-2933
- Availability:
- In Stock - Ships same or next business day.
$4.99 $3.28 -
Sold Out, please call for ETA.
Sierra Seal E/J 321786 18-2030
Sierra
$10.79 $1.30Sierra Seal E/J 321786 18-2030- Part Number:
- 47-2030
- Availability:
- In Stock - Ships same or next business day.
$10.79 $1.30 -
Sierra Seal Honda# 91254-Zw1-003 18-0522
Sierra
$13.09 $10.36Sierra Seal Honda# 91254-Zw1-003 18-0522- Part Number:
- 47-0522
- Availability:
- In Stock - Ships same or next business day.
$13.09 $10.36 -
Sierra Seal Honda# 91255-Zw1-003 18-2053
Sierra
$23.29 $16.40Sierra Seal Honda# 91255-Zw1-003 18-2053- Part Number:
- 47-2053
- Availability:
- In Stock - Ships same or next business day.
$23.29 $16.40
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.