Aftermarket Parts
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Sierra Trim Motor 18-6773
Sierra
$356.79 $259.99Sierra Trim Motor 18-6773- Part Number:
- 47-6773
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercury/Mariner - 828708 - 878265A4
$356.79 $259.99 -
Sierra Tuneup Kit Mcomc/Yam 811635Q2 18-5280
Sierra
$26.39 $21.99Sierra Tuneup Kit Mcomc/Yam 811635Q2 18-5280Tune up kits include cap and rotor.- Part Number:
- 47-5280
- Availability:
- In Stock - Ships same or next business day.
- Description:
- 4 Cylinder
- Application:
- Crusader - Indmar - Mercruiser - OMC - Yamaha
$26.39 $21.99 -
Sierra U-Joint Assembly MerCruiser #814819A 2 18-9218
Sierra
$786.19 $568.61Sierra U-Joint Assembly MerCruiser #814819A 2 18-9218- Part Number:
- 47-9218
- Availability:
- In Stock - Ships same or next business day.
$786.19 $568.61 -
Sierra V-Belt 46In 18-15460
Sierra
$41.89 $27.20Sierra V-Belt 46In 18-15460High strength synthetic cords resist shockload failure.The compression section is a special rubber compound that assures smooth and even transfer of load forces to the cords.Cogs are molded to precise engineering tolerances to...- Part Number:
- 47-15460
- Availability:
- In Stock - Ships same or next business day.
- Eff. Length:
- 46"
- Top Width:
- 29/64"
- OEM #:
- 57-48120A1 - OMC 310953 - 909971 - Volvo 829207 - 950818
$41.89 $27.20 -
Sierra V-Belt 48In Vp-Mc 18-15480
Sierra
$35.19 $23.08Sierra V-Belt 48In Vp-Mc 18-15480High strength synthetic cords resist shockload failure.The compression section is a special rubber compound that assures smooth and even transfer of load forces to the cords.Cogs are molded to precise engineering...- Part Number:
- 47-15480
- Availability:
- In Stock - Ships same or next business day.
- Eff. Length:
- 48"
- Top Width:
- 29/64"
- OEM #:
- 57-48122
$35.19 $23.08 -
Sierra V-Belt Mc57-49213Q1/OMC 311046 18-15440
Sierra
$41.39 $29.99Sierra V-Belt Mc57-49213Q1/OMC 311046 18-15440High strength synthetic cords resist shockload failure.The compression section is a special rubber compound that assures smooth and even transfer of load forces to the cords.Cogs are molded to precise...- Part Number:
- 47-15440
- Availability:
- In Stock - Ships same or next business day.
- Eff. Length:
- 44"
- Top Width:
- 29/64"
- OEM #:
- 57-49213A1 - 57-45856 - OMC 311046
$41.39 $29.99 -
Sierra Volt Reg-16A40A/'92 & Later 18-5743
Sierra
$231.49 $169.99Sierra Volt Reg-16A40A/'92 & Later 18-5743- Part Number:
- 47-5743
- Availability:
- In Stock - Ships same or next business day.
- Replaces:
- Mercury/Mariner 815279 3 - 815279 5 - 883072T
$231.49 $169.99 -
Sierra Wire Separator-Black 18-28151
Sierra
$8.79 $7.35Sierra Wire Separator-Black 18-28151- Part Number:
- 47-28151
- Availability:
- In Stock - Ships same or next business day.
- Color:
- Black
$8.79 $7.35 -
Sierra Wire Set GM 4.3L Est & T-Bolt 18-8835-1
Sierra
$102.99 $77.99Sierra Wire Set GM 4.3L Est & T-Bolt 18-8835-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...- Part Number:
- 47-88351
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercruiser - V6
$102.99 $77.99 -
Sierra Wire Set MerCruiser 350Mag Mie-Ski Est 18-8832-1
Sierra
$107.39 $79.99Sierra Wire Set MerCruiser 350Mag Mie-Ski Est 18-8832-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...- Part Number:
- 47-88321
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercruiser - 350 Mag MPI MIE Gen+ - Delco HEI ignition - Black Scorpion Ski Gen+ - 350 cid - Delco HEI ignition - 454 cid EFI - Mag MPI and Horizon MIE - 8 cylinder - 502 Mag - 502 EFI & Mag MPI - 8 cylinder
$107.39 $79.99 -
Sold Out, please call for ETA.
Sierra Wire Set MerCruiser 5.7-6.2L T-Bolt 18-8834-1
Sierra
$108.69 $80.39Sierra Wire Set MerCruiser 5.7-6.2L T-Bolt 18-8834-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine...- Part Number:
- 47-88341
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercruiser - 350 Mag MPI MIE Gen+ - 8 cylinder - Mercury HEI ignition
$108.69 $80.39 -
Starbrite Lube-White PTFE 4Oz 85504
Starbrite
$25.89 $20.99Starbrite Lube-White PTFE 4Oz 85504 • A super adhesion-special PTEF formula that will not wash off• Impervious to salt and fresh water• Protects from - 65°, F to +650°, F• Reduces wear and stops squeaks• Greatly...- Part Number:
- 74-85504
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 4 oz.
$25.89 $20.99 -
Starbrite Oil-TCW3 Super Synthetic Blend 1 Gallon 19200
Starbrite
$68.69 $59.96Starbrite Oil-Tcw3 Super Syn Blend Gal@6 19200 • Super Premium TC-W3 combines an extremely high-grade synthetic-blend base stock with a custom additive package• It contains a higher concentration of the additives found in Premium TC-W3•...- Part Number:
- 74-19200
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 1 Gallon
$68.69 $59.96 -
Starbrite Star Tron Diesel Add Gallon 93100N
Starbrite
$233.99 $145.97Starbrite Star Tron Diesel Add Gallon 93100N • Makes any engine run more smoothly, start more easily Eliminates & prevents carbon deposits Stabilizes fuel, greatly reduces soot & other emissions Improves cetane of old, substandard fuel 1...- Part Number:
- 74-93100
- Availability:
- In Stock - Ships same or next business day.
- Size:
- Gallon
- Treats:
- 4096 gal.
$233.99 $145.97 -
Starbrite Star Tron Diesel Additive 32Oz 93132
Starbrite
$62.29 $41.50Starbrite Star Tron Diesel Additive 32Oz 93132 • Makes any engine run more smoothly, start more easily Eliminates & prevents carbon deposits Stabilizes fuel, greatly reduces soot & other emissions Improves cetane of old, substandard fuel 1...- Part Number:
- 74-93132
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 32 oz.
- Treats:
- 1024 gal.
$62.29 $41.50 -
Starbrite Startron Ring Clean 16Oz 95616
Starbrite
$23.09 $18.54Starbrite Startron Ring Clean 16Oz 95616 • Formulated with the latest technology in deposit control compounds, plus a proprietary enzyme package designed to remove existing deposits and help prevent the formation of new deposits• Improves fuel...- Part Number:
- 74-95616
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 16 oz (473 ml)
$23.09 $18.54 -
Uflex 90 Degree Mounting Bezel Black X34
Uflex
$40.49 $29.99Uflex 90 Degree Mounting Bezel X34 Direct "drop in" replacement for competing systems. Fits steering systems: Rotary T71FC, T72FC, ZeroTorque Helm T73FC, Rack & Pinion G86 & G88NR.- Part Number:
- 216-X34
- Availability:
- In Stock - Ships same or next business day.
- Type:
- 90 Deg -
- Color:
- Black
$40.49 $29.99 -
Uflex Cable T/S 33C with SS Core C8
Uflex
$39.99Uflex Cable T/S 33C with SS Core C8 Universal 33C style control cable with stainless steel 10-32 threaded end fittings. Features a full complement of lay wires for enhanced efficiency and durability. Direct replacement for Yamaha, Suzuki, Honda and other...- Part Number:
- NW-216C833C
- Availability:
- In Stock - Ships same or next business day.
$39.99 -
Uflex Connector Kit For B83/B84 K35
Uflex
$37.19 $26.99Uflex Connector Kit For B83/B84 K35- Part Number:
- 216-K35
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Kit to connect C5 and MC5 Mercury Gen I cables to all Uflex controls except B35 - B301 - B302 - B103 - B104 - B47 and B49
$37.19 $26.99 -
Sold Out, please call for ETA.
Uflex Control Box/Dual Lvr/Bncl Mt/C B-104
Uflex
$1,095.19 $819.99Uflex Control Box/Dual Lvr/Bncl Mt/C B-104 Suitable for use with outboard, inboard or I/O power plants. Includes neutral safety switch X43 to prevent in-gear starting Suitable for exposed positions such as flying bridge For use with...- Part Number:
- 216-B104
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Dual Lever
- Color:
- Chrome
$1,095.19 $819.99
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.