Aftermarket Parts
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Sierra Sahara Tach(El) O/B & 4-Stroke 59703P
Sierra
$140.59 $93.99Sierra Sahara Tach(El) O/B & 4-Stroke 59703PBlack 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:
- 11-59703P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 3"
- Type:
- Tach - Elect - Outboard & 4-Stroke Gas
- Dial Range:
- 0-7000 rpm
- Sender Code:
- O/B Alt or Coil
$140.59 $93.99 -
Sierra Seal Kit-Upper Gc OMC Cobra 18-2673
Sierra
$78.99 $69.99Sierra Seal Kit-Upper Gc OMC Cobra 18-2673Includes: Water Pump Base Gasket O.E.# 911698; Water Cover Gasket O.E.# 911733; Grommets (2) O.E.# 911705; Oil Seal O.E.# 911685; Oil Seal O.E.# 911701; 916058; 915000; Rubber Seal O.E.# 911704; Water Pump...- Part Number:
- 47-2673
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 984459 - 986364 - 987603
$78.99 $69.99 -
Sold Out, please call for ETA.
Sierra Seal OMC 313282 18-2023
Sierra
$20.09 $14.68Sierra Seal OMC 313282 18-2023- Part Number:
- 47-2023
- Availability:
- In Stock - Ships same or next business day.
$20.09 $14.68 -
Sierra Solenoid-Om#985064 & MerCruiser 18-5801
Sierra
$55.29 $39.99Sierra Solenoid-Om#985064 & MerCruiser 18-5801- Part Number:
- 47-5801
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercruiser 89-76416A-1 - Pleasurecraft R130001 - OMC 985064
$55.29 $39.99 -
Sierra Spark Plug Boot/Universal 18-5752
Sierra
$8.99 $7.99Sierra Spark Plug Boot/Universal 18-5752- Part Number:
- 47-5752
- Availability:
- In Stock - Ships same or next business day.
$8.99 $7.99 -
Sierra Starter Chr/For 70-150 Hp 18-5613
Sierra
$163.89 $155.63Sierra Starter Chr/For 70-150 Hp 18-5613- Part Number:
- 47-5613
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Chrysler/Force FK616955 - 61-6955 - 490955 - 480955 - 50-898265002
$163.89 $155.63 -
Sierra Starter O/B OMC #584799 18-5619
Sierra
$184.49 $176.95Sierra Starter O/B OMC #584799 18-5619- Part Number:
- 47-5619
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Johnson/Evinrude 584799 - 396235 - 391511 - 397023 - 586731 - 586890
$184.49 $176.95 -
Sierra Sterling 2 Water Temp. I/O 63480P
Sierra
$66.59 $53.81Sierra Sterling 2 Water Temp. I/O 63480PBlack graphics on a brushed aluminum dial background. Pointers are black. Perimeter lighting is provided for night visibility. Domed glass convex lenses are scratch resistant.- Part Number:
- 11-63480P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Water Temperature - Electric
- Dial Range:
- 120-240 F
- Sender Code:
- D
$66.59 $53.81 -
Sierra Sterling Ob H2O Pres Kit 30Psi 63481P
Sierra
$133.19 $105.67Sierra Sterling Ob H2O Pres Kit 30Psi 63481PBlack graphics on a brushed aluminum dial background. Pointers are black. Perimeter lighting is provided for night visibility. Domed glass convex lenses are scratch resistant.- Part Number:
- 11-63481P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Water Pressure - Fittings & 20' of Tubing
- Dial Range:
- 30 PSI
- Sender Code:
- WP included
$133.19 $105.67 -
Sierra Sterling Tachometer Gas 7000 Rpm 63473P
Sierra
$132.69 $91.60Sierra Sterling Tachometer Gas 7000 Rpm 63473PBlack graphics on a brushed aluminum dial background. Pointers are black. Perimeter lighting is provided for night visibility. Domed glass convex lenses are scratch resistant.- Part Number:
- 11-63473P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 3"
- Type:
- Tach - Elect - Outboard & 4-Stroke Gas
- Dial Range:
- 0-7000 rpm
- Sender Code:
- O/B Alt or Coil
$132.69 $91.60 -
Sierra Sterling Trim-Yamaha 2001+ 63482P
Sierra
$56.09 $49.99Sierra Sterling Trim-Yamaha 2001+ 63482PBlack graphics on a brushed aluminum dial background. Pointers are black. Perimeter lighting is provided for night visibility. Domed glass convex lenses are scratch resistant.- Part Number:
- 11-63482P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Trim - Mariner/Merc/Cobra/Volvo Dp - SX - Yamaha 2001 & on
- Dial Range:
- Up-Down
- Sender Code:
- Engine Mfg.
$56.09 $49.99 -
Sierra Sterling Voltmeter 8V-18 Vdc 63478P
Sierra
$55.59 $43.43Sierra Sterling Voltmeter 8V-18 Vdc 63478PBlack graphics on a brushed aluminum dial background. Pointers are black. Perimeter lighting is provided for night visibility. Domed glass convex lenses are scratch resistant.- Part Number:
- 11-63478P
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 2"
- Type:
- Voltmeter
- Dial Range:
- 8-18 VDC
- Sender Code:
- N/R
$55.59 $43.43 -
Sierra Switch Temp 200 Psi 3/8-18Npt Ts25101
Sierra
$37.69 $27.45Sierra Switch Temp 200 Psi 3/8-18Npt Ts25101- Part Number:
- 11-TS25101
- Availability:
- In Stock - Ships same or next business day.
- Thread:
- 3/8" - 18
- Terminal:
- 1/4 Q.D Terminal
- Temp.:
- 200 Deg - F
$37.69 $27.45 -
Sierra Thermostat - Crusader# 96358 18-3552
Sierra
$26.49 $21.02Sierra Thermostat - Crusader# 96358 18-3552- Part Number:
- 47-3552
- Availability:
- In Stock - Ships same or next business day.
$26.49 $21.02 -
Sierra Thermostat Kit 18-3676
Sierra
$41.79 $32.99Sierra Thermostat Kit 18-3676- Part Number:
- 47-3676
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Thermostat Kit - (O-ring - gasket and thermostat) Replaces OEM # 3853983-9
$41.79 $32.99 -
Sierra Thermostat Kit-Marine Power 3.0L 18-3650
Sierra
$37.09 $28.60Sierra Thermostat Kit-Marine Power 3.0L 18-3650- Part Number:
- 47-3650
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Includes: Thermostat Gasket O.E.# 27-47590-1 - Thermostat: O.E.# 59078
$37.09 $28.60 -
Sierra Thermostat Kohler# 249930 23-3608
Sierra
$18.79 $16.18Sierra Thermostat Kohler# 249930 23-3608- Part Number:
- 47-233608
- Availability:
- In Stock - Ships same or next business day.
- Temp.:
- 190 Deg -
- OEM #:
- Kohler
#249930 - Fits:
- 4EF - 5E - 6EF - 7.3E - 8E - 10E - 12.5E - 12.5CF - 15C - 16CF - 20C
$18.79 $16.18 -
Sierra Thermostat Yamaha # 60V-12411-00 18-3525
Sierra
$46.29 $39.99Sierra Thermostat Yamaha # 60V-12411-00 18-3525Items ending in "D" are Display Packaged- Part Number:
- 47-3525
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- 60V-12411-00
$46.29 $39.99 -
Sierra Tilt And Trim Motor 18-6777
Sierra
$474.29 $322.06Sierra Tilt And Trim Motor 18-6777- Part Number:
- 47-6777
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Chrysler: 818903A1 -819762A4-A7 -819479A1 -819480A1 -81977A8-A9 - 822870A1 -830250A3-T3 -832021A1-T4-A2-T2 -855654A1-T2 - 19217A1-A5
Mercury: 818903A1 -819762A4-A7 -819479A1 -819480A1 -81977A8-A9 - 822870A1 -830250A3-T3 -832021A1-T4-A2-T2 -855654A
$474.29 $322.06 -
Sierra Transom Seal OMC#313080 18-2767
Sierra
$182.29 $140.25Sierra Transom Seal OMC#313080 18-2767- Part Number:
- 47-2767
- Availability:
- In Stock - Ships same or next business day.
- Description:
- OMC Sterndrive/Cobra - 120 hp & Up ('67-'77)
- Replaces:
- 313080
$182.29 $140.25
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.