Aftermarket Parts
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Sierra Wire Set GM 3.0L Delco Est 18-8811-1
Sierra
$58.09 $42.73Sierra Wire Set GM 3.0L Delco Est 18-8811-1Magnetic Suppression Core manufactured for your specific application.Kevlar® core for maximum durability and long lifeDurable stainless steel wound conductor for maximum horsepower and engine performancePremium...- Part Number:
- 47-88111
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Flagship - Indmar - Marine Power & Mastercraft - 181 - 3.0L -EST & EFI ignition - 4 cylinder. Mercruiser - All 4 cylinders
$58.09 $42.73 -
Sierra Wire Set GM 3.8L-4.3L V6 Conv 18-8801-1
Sierra
$80.89 $59.99Sierra Wire Set GM 3.8L-4.3L V6 Conv 18-8801-1Magnetic 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:
- 47-88011
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Flagship - Indmar - Marine Power & Mastercraft - 262 - 4.3L - 6 cylinder - conventional ignition. Mercruiser - 185 - 229 - cid - V6 - conventional ignition. OMC - 3.8L ('81-'86) - 4.3L ('85-'90) - 262 King Cobra ('89) - V6 - conventional ignition. Vo
$80.89 $59.99 -
Sierra Wire Set GM2.5L-3.0L Delco Cnv 18-8800-1
Sierra
$52.79 $40.37Sierra Wire Set GM2.5L-3.0L Delco Cnv 18-8800-1Magnetic 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:
- 47-88001
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Flagship - Indmar - Marine Power & Mastercraft - 181 - 3.0L - 4 cylinder - conventional ignition. Mercruiser - 120 - 140 hp - 2.5L & 3.0L 4 cylinder - conventional ignition. OMC Sterndrive/Cobra - 100 ('72-'73) - 110 ('64) - 120 ('65-'74) - 140 FF &
$52.79 $40.37 -
Sold Out, please call for ETA.
Sierra Wire Set GMv8 Mallory Side Trm 18-8823-1
Sierra
$71.69 $3.90Sierra Wire Set GMv8 Mallory Side Trm 18-8823-1Magnetic 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:
- 47-88231
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Volvo - Model AQ190A - AQ200B-F - AQ211A - AQ225B & D - AQ231B & D - AQ240A - AQ255A & F - AQ260A & B - AQ271A & D - AQ290A - AQ311A & B - BB225A-C - BB231A - BB260A-C - BB261A - 8 cylinder (FF & R only '74)
$71.69 $3.90 -
Sierra Wire Set MerCruiser 420Hp-800Sc T.Bolt 18-8836-1
Sierra
$110.79 $86.99Sierra Wire Set MerCruiser 420Hp-800Sc T.Bolt 18-8836-1Magnetic 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:
- 47-88361
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Mercruiser - 350 Mag Bravo MPI & Gen+ - 350 Mag MPI Ski Gen+ - 8 cylinder
$110.79 $86.99 -
Sold Out, please call for ETA.
Sierra Yanmr 129698-77010 Starter 18-6932
Sierra
$150.79 $136.78Sierra Yanmr 129698-77010 Starter 18-6932These all NEW replacement starters feature a permanent magnet design for more torque and longer life. They meet OEM specs and meet or exceed OEM output for guaranteed performance. High temperature epoxy coated...- Part Number:
- 47-6932
- Availability:
- In Stock - Ships same or next business day.
- Type:
- New
- Fits:
- Yanmar/Hitachi
- OEM #:
- Yanmar 121370-77010 - 129242-77010 - 129698-77010
$150.79 $136.78 -
Sierra Zinc Magnesium 18-6241
Sierra
$20.59 $19.73Sierra Zinc Magnesium 18-6241Always check propeller clearance after installing new trim tab anodes.- Part Number:
- 47-6241
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Magnesium
- Fits:
- Mercruiser - 31640 - 31640A1 - 31640 T6 - 31640Q 4
Honda - 41107-ZW1-0032A
$20.59 $19.73 -
STA-BIL Marine Formula 10oz 22241
STA-BIL
$17.99 $9.29STA-BIL Marine Formula 10oz 22241 Ethanol Treatment & Performance Improver Extra corrosion protection & fuel system cleaning Recommended to be used at every fill up, not just for seasonal storage Double the corrosion preventers than in regular...- Part Number:
- 269-22241
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 10 oz.
- Treats:
- 100 gal.
$17.99 $9.29 -
Sold Out, please call for ETA.
Starbrite Diesel Storage Additive 8 (W) 84408
Starbrite
$15.19 $10.35Starbrite Diesel Storage Additive 8 (W) 84408 • Protects fuel and engine components during storage• Eliminates need to fog engine, prevents corrosion of fuel tank and fuel delivery system, stops formation of gum and sludge, insures quick starts...- Part Number:
- 74-84408
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 8 oz.
- Treats:
- 80 gal.
$15.19 $10.35 -
Starbrite Gas Storage Additive-16 Oz.(W 84316
Starbrite
$20.59 $13.21Starbrite Gas Storage Additive-16 Oz.(W 84316 • Protects gas and engine components during storage• For inboard and outboard gas engines• Eliminates need to fog engine• Prevents corrosion of fuel tank and delivery system•...- Part Number:
- 74-84316
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 16 oz.
- Treats:
- 80 gal.
$20.59 $13.21 -
Starbrite High Vis Gear Lube 80W90 32 Oz 27032
Starbrite
$19.19 $13.63Starbrite High Vis Gear Lube 80W90 32 Oz 27032 • For API MT-1 GL-5, MIL-L-2105D service• Formulated with special anti-wear additives, rust and corrosion inhibitors• Will not void manufacturers' warranty• For lower units of all...- Part Number:
- 74-27032
- Availability:
- In Stock - Ships same or next business day.
- Size:
- Quart Bottle
$19.19 $13.63 -
Sold Out, please call for ETA.
Starbrite Star Tron Shooter 1Oz Twin 2 Pack 14301
Starbrite
$10.99 $6.42Starbrite Star Tron Shooter 1Oz Twin 2 Pack 14301 • Compact, handy size is ideal for outboards, outdoor power equipment, lawn and garden equipment, motorcycles, snowmobiles, ATV's, scooters, chain saws, and many other applications• Unique...- Part Number:
- 74-14301
- Availability:
- In Stock - Ships same or next business day.
- Size:
- 1oz.
- Treats:
- 6 Gals.
- Pack:
- 2
$10.99 $6.42 -
Tiedown Engineering 250' Spool Wire Rope 51815
Tiedown Engineering
$112.99 $91.88Tiedown Engineering 250' Spool Wire Rope 51815Clear vinyl coated tested to 1000 pound tensile strength.7 x 7, 3/16" O.D., 3/32" Dia.- Part Number:
- 241-51815
- Availability:
- In Stock - Ships same or next business day.
- Length:
- 250'
$112.99 $91.88 -
Trident Hose B1-15 Epa Fuel Line 3/8" x 50' 3050386
Trident Hose
$202.79 $136.12Trident Hose B1-15 Epa Fuel Line 3/8" x 50' 3050386Barrier lined B1-15 Fuel Hose for both gasoline (including ethanol blends up to E85) and diesel (including bio diesel blends up to 100%). Exceeds ABYC H-24, SAE J1527, ISO 8469 B1, USCG Type B1-15, CARB...- Part Number:
- 606-3050386
- Availability:
- In Stock - Ships same or next business day.
- ID:
- 3/8"
- OD:
- 37/64"
- Length:
- 50'
$202.79 $136.12 -
Trident Hose Fiberglass Tube Conn 5 2605001
Trident Hose
$111.19 $64.33Trident Hose Fiberglass Tube Conn 5 2605001For exhaust hose, elbows, hump hose & reducers. Fire retardant/heat resistant USA made (install minimum 2' downstream from point of cooling water injection.) 200°, max continuous operating temperatures.- Part Number:
- 606-2605001
- Availability:
- In Stock - Ships same or next business day.
- OD:
- 5"
- Length:
- 6"
$111.19 $64.33 -
Uflex Balanced Cylinder Uc133-Iob
Uflex
$721.09 $649.99Uflex Balanced Cylinder Uc133-Iob Universal design for most sterndrive applications Attaches to transom shield where steering cable would otherwise attach Anodized and stainless steel construction Recommended for use with UP28FM or...- Part Number:
- 216-UC133IOB
- Availability:
- In Stock - Ships same or next business day.
- Volume:
- 8.0ci
- Stroke:
- 8"
- Bore:
- 1.25"
$721.09 $649.99 -
Uflex Control Box Single Function Dual Lever Side Mount Control White B47
Uflex
$268.89 $219.99Uflex Control Box Dual Lever B47 Suitable for outboard powered boats Made of nylon fiberglass with anodized aluminum levers Left or right side mount installation Direct connection to Merc Gen I cables K23 connection kit is required when...- Part Number:
- 216-B47
- Availability:
- In Stock - Ships same or next business day.
- Description:
- White
$268.89 $219.99 -
Uflex Dual Raked Lever F M Throttle B46T
Uflex
$578.89 $439.99Uflex Dual Raked Lever F M Throttle B46T Two lever/ single action for shift OR throttle. Flush mount suitable for exposed positions such as flying bridge Made of marine aluminum with chrome plated lever Available with straight or bent...- Part Number:
- 216-B46T
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Throttle only
- Type:
- Bent Lever
$578.89 $439.99 -
Uflex Front Mount Helm 1.7 Up28Fm
Uflex
$744.99 $729.99Uflex Front Mount Helm 1.7 Up28Fm Front mount helms are drop-in replacements for SeaStar® Helm. Compact design Built-in lock valve for positive rudder lock Integral relief valve for over-pressure protection Compatible with Teleflex...- Part Number:
- 216-UP28FM
- Availability:
- In Stock - Ships same or next business day.
- Volume:
- 1.7ci
- Pistons:
- 5
- Max Wheel:
- 28"
$744.99 $729.99 -
Uflex Helm Front Mount Pump UP20FM
Uflex
$675.49 $589.99Uflex Helm Up20Fm Front mount helms are drop-in replacements for SeaStar® Helm. Compact design Built-in lock valve for positive rudder lock Integral relief valve for over-pressure protection Compatible with Teleflex SeaStar cylinders,...- Part Number:
- 216-UP20FM
- Availability:
- In Stock - Ships same or next business day.
- Volume:
- 1.2ci
- Pistons:
- 5
- Max Wheel:
- 20"
$675.49 $589.99
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.