null

FREE SHIPPING OVER $99

BEST PRICE GUARANTEED

EARN POWERBOAT REWARDS

SUPPORT M-F 9-5 EST: 856-232-6969

Buy a Mercury Outboard → Get 8-Year Platinum Warranty for $1! ⚡ Offer Ends Soon! — Shop Now ›

We will be closed for our Annual Holiday Closure from December 24th through January 5th. Some orders may be delayed.

Have a Merry Christmas and Happy New Year!!!

Boat Accessories and Supplies

Boat Accessories and Supplies

  • Sold Out, please call for ETA.
    Sierra Glows Blue In Tg21390

    Sierra Glows Blue In Tg21390

    Sierra

    $8.79 $1.30
    Sierra Glows Blue In Tg21390Non-corrosive plastic construction; plastic handle1/2" mounting holeRated 15 amp @ 12 VDCON in parenthesis (On) indicates a momentary position
    Part Number:
    11-TG21390
    Availability:
    In Stock - Ships same or next business day.
    Description:
    On/Off (Glows Green in ON)
    Terminals:
    3 Blade
    Type:
    SPST
    Pkg.:
    Retail
  • Sold Out, please call for ETA.
    Sierra Grease Bearing 3Oz Cart 2 Pack 18-9700-2

    Sierra Grease Bearing 3Oz Cart 2 Pack 18-9700-2

    Sierra

    $0.00
    Sierra Grease Bearing 3Oz Cart 2 Pack 18-9700-2Specifically formulated for marine applications. Premium lithium formulation for optimum corrosion protection in freshwater and saltwater applications. Ideal for marine trailer wheel bearings; universal...
    Part Number:
    47-97002
    Availability:
    In Stock - Ships same or next business day.
    Size:
    3 oz. Cartridge (2)
    Pack:
    2
  • Sierra Horn Button W/Black Plunger Mp39680

    Sierra Horn Button W/Black Plunger Mp39680

    Sierra

    $11.89 $9.56
    Sierra Horn Button W/Black Plunger Mp39680Momentary ON-OFF SPSTContoured plastic buttonChrome plated brass mounting stem1/2" mount hole2 brass blade terminals
    Part Number:
    11-MP39680
    Availability:
    In Stock - Ships same or next business day.
    Rating:
    15 amps at 12 volts DC
    Color:
    Black
    $11.89 $9.56
  • Sierra Ignition Lanyard Yamaha 682 82556 00 00 Mp28860

    Sierra Ignition Lanyard Yamaha 682 82556 00 00 Mp28860

    Sierra

    $15.99 $13.09
    Sierra Ignition Lanyard Yamaha 682 82556 00 00 Mp28860Lanyard for emergency engine cut-off switch. Kills ignition when lanyard is pulled. For use with conventional or magneto ignitions. Seals out moisture and makes reconnection easier.
    Part Number:
    11-MP28860
    Availability:
    In Stock - Ships same or next business day.
    Fits:
    Yamaha
    Replaces:
    682-82556-00-00
    $15.99 $13.09
  • Sierra Ignition Swi Watpro 55-1947 Mp39200

    Sierra Ignition Swi Watpro 55-1947 Mp39200

    Sierra

    $27.79 $19.95
    Sierra Ignition Swi Watpro 55-1947 Mp39200All amperage ratings are at 12V DC.Polyester Switches: Provide maximum corrosion protection and eliminate potential shorts. Inner seal between cylinder lock and contact plate.Brass Switches: Traditional corrosion...
    Part Number:
    11-MP39200
    Availability:
    In Stock - Ships same or next business day.
    Type:
    Conventional
    Material:
    Polyester
    Max Panel Thickness:
    1-1/8"
    Terminals:
    3 Screw
    Boot:
    Yes
    Mtg Hole:
    7/8"
    $27.79 $19.95
  • Sierra Ignition Switch Mp51020

    Sierra Ignition Switch Mp51020

    Sierra

    $126.59 $97.52
    Sierra Ignition Switch Mp51020Exact OEM replacements installation for Yamaha outboards. Ideal for use with DFI; EFI and MPI engine packages. A rubber molded key combines OEM appearance and feel with a solid; secure grip in all conditions - even when...
    Part Number:
    11-MP51020
    Availability:
    In Stock - Ships same or next business day.
    For:
    2 & 4 Stroke (control box)
    OEM #:
    703-82510-12-00
    $126.59 $97.52
  • Sierra Ignition Switch Mp51040

    Sierra Ignition Switch Mp51040

    Sierra

    $159.59 $121.64
    Sierra Ignition Switch Mp51040Exact OEM replacements installation for Yamaha outboards. Ideal for use with DFI; EFI and MPI engine packages. A rubber molded key combines OEM appearance and feel with a solid; secure grip in all conditions - even when...
    Part Number:
    11-MP51040
    Availability:
    In Stock - Ships same or next business day.
    For:
    2 & 4 Stroke (Control Box)
    OEM #:
    703-82510-43-00
    $159.59 $121.64
  • Sierra In-Line Fuse Holder Fs45410

    Sierra In-Line Fuse Holder Fs45410

    Sierra

    $10.99 $8.51
    Sierra In-Line Fuse Holder Fs45410Designed to accept automative style spade-terminal fuses. ATO/ATC. Bulk packed
    Part Number:
    11-FS45410
    Availability:
    In Stock - Ships same or next business day.
    Rating:
    20A
    Gauge:
    14
    Fuse:
    20A
    $10.99 $8.51
  • Sierra Indicator Lamp Un22150

    Sierra Indicator Lamp Un22150

    Sierra

    $16.19 $12.59
    Sierra Indicator Lamp Un22150Wire leads for easy hookup.
    Part Number:
    11-UN22150
    Availability:
    In Stock - Ships same or next business day.
    Lens:
    Red
    Hole:
    5/16"
    Volts:
    125V AC
    $16.19 $12.59
  • Sierra Mom ON-OFF-Mom On S.P. Rocker Rk40350

    Sierra Mom ON-OFF-Mom On S.P. Rocker Rk40350

    Sierra

    $13.29 $11.04
    Sierra Mom ON-OFF-Mom On S.P. Rocker Rk40350Non corrosive plastic construction. Black face plate. Non-illuminated. Silver contacts and brass blade terminals. Rated: 20 amps @ 12 VDC. ON in parenthesis (On) indicates a momentary position.
    Part Number:
    11-RK40350
    Availability:
    In Stock - Ships same or next business day.
    Positions:
    (On)/Off/(On)
    Color:
    Black
    Type:
    SPDT
    Terminals:
    3 Blade
    $13.29 $11.04
  • Sold Out, please call for ETA.
    Sierra Mom.ON-OFF Illuminated Rocker Rk40120

    Sierra Mom.ON-OFF Illuminated Rocker Rk40120

    Sierra

    $16.19 $13.10
    Sierra Mom.ON-OFF Illuminated Rocker Rk40120Non-corrosive plastic construction; silver contacts; brass blade terminals. Rated 20 amps @ 12VDC. Fits a cutout of .830'' x 1.45''. Fits panel up to .187'' thick. ON in parenthesis (On) indicates a momentary...
    Part Number:
    11-RK40120
    Availability:
    In Stock - Ships same or next business day.
    Positions:
    (On)/Off
    Type:
    SPST
    Terminals:
    3 Blade
  • Sierra Mom.ON-OFF-Mom.On Tip Light Tg40330

    Sierra Mom.ON-OFF-Mom.On Tip Light Tg40330

    Sierra

    $21.79 $16.96
    Sierra Mom.ON-OFF-Mom.On Tip Light Tg40330Lights through tip of handle. Non-corrosive plastic construction. Illuminates white when panel lights are ON; changes to red when switch is ON. Brass blade terminals; silver contacts. 15/32" L x 15/32" -32...
    Part Number:
    11-TG40330
    Availability:
    In Stock - Ships same or next business day.
    Positions:
    (On)/Off/(On)
    Terminals:
    5 Blade
    Type:
    SPDT
    Pkg.:
    Retail
    $21.79 $16.96

Shop the Best Boat Accessories Online

Whether you're prepping for a weekend on the water or upgrading your gear, PowerBoatSupply.com has all the boat accessories you need. From electrical components and drink holders to safety gear and dock lines, our wide selection of boat accessories ensures you're ready for anything out on the water.

We carry trusted brands like Sea-Dog Line, Seachoice, Attwood Marine, and more — offering both essential and specialized boat accessories for every type of boater. Not sure which part is right for your setup? Our team is here to help you choose the best boat accessories for your vessel and your adventures.

Browse our best-selling items below and get fast shipping, great prices, and top-rated customer service from PowerBoatSupply.com — your source for quality marine parts and accessories since 1987.