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  • Engine
  • Drivetrain
  • Underwater Hardware
  • Maintenance
  • Accessories
  • Clothing, Hats, and Gifts

    • Shop by Brand

  • View all Brands

    • Maintenance

    Nothing will kill the fun faster than a boat that won't start due to a mechanical malfunction. Avoid the headache and save yourself time and money by doing the proper preventative upkeep and repairs on your watercraft. At Discount Inboard Marine, we carry a wide variety of boat maintenance products to help keep your watercraft running at its very best. Shop for boat repair supplies, boat maintenance products, spark plugs, oils and fluids, flush kits and much more. Make Discount Inboard Marine your one-stop-shop for boat maintenance supplies and repair products.

    • MEGUIARS QUICK WAX, SPRAY
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      MEGUIARS QUICK WAX, SPRAY

      Wax your boat as you dry to create a brilliant gloss and add wax protection Use on a wet or dry surface. Quickly and easily maintains gloss between periodic waxings.
      $12.25
      Add to Cart
    • FOG ENGINE STOR, 13 OZ.
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      FOG ENGINE STOR, 13 OZ.

      CRC Marine Engine Stor®. A fogging fluid for seasonal motor storage and long-term metal protection from tools to engines. Excellent anti-seize lubricant that protects marine engines, electrical connections and other internal combustion engines...
      $8.00
      Add to Cart
    • 3M PERFECT IT GELCOAT CUTTING COMPOUND/WAX
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      3M PERFECT IT GELCOAT CUTTING COMPOUND/WAX

      The 3M "perfect it" is an easy one-step process. Make your Gelcoat look like new on your ski or wakeboard boat. Use whenever you want a durable wax finish. Specifically formulated for boats RVs and industrial gel coats   WATCH...
      $42.35
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    • CAP & ROTOR GM DELCO CAP & ROTOR GM DELCO
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      CAP & ROTOR GM DELCO

      Cap & Rotor GM Delco Tune-Up Kit RP173081: Fits: Most Indmar EFI and carbureted after 1993, Indmar thru 2005 (Monsoon, MCX, RTP) PCM TBI thru 2001. Does NOT Fit: coil pack type ignitions like LT1  2 screws hold down the cap with a...
      $35.00
      Add to Cart
    • SPARK PLUG KIT 302/351 (14MM) SPARK PLUG KIT 302/351 (14MM)
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      SPARK PLUG KIT 302/351 (14MM)

      Spark Plug Set Ford 302 351 14mm Autolite #24 RP030002 at Discount Inboard Marine. Spark plugs Recommended by the manufacturers for optimum performance, these spark plugs are the correct heat range for your marine engine. Spark Plugs: Autolite...
      $34.25
      Add to Cart
    • REPAIR KIT 4160 351 REPAIR KIT 4160 351
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      REPAIR KIT 4160 351

      Our 4160 Holley Carb Rebuild Kit (RN0120-1) fits 351 - 350 - 5.8 - 5.7 engines. Each Holley Carburetor Rebuild Kit contains all the parts and gaskets necessary to restore like-new performance to your marine carburetor. Detailed instructions are also...
      $62.40
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    • ANODE ZINC 1/4
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      ANODE ZINC 1/4

      All PCM/SeaMaxx Ford GT40 EFI and 302/351Carbureted. Most PCM/SeaMaxx GM 5.7, 5.0L, 7.4L, 8.1L, 8.2L. (Not 6.0L) Bin Number (ISBN): 90108
      $11.89
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    • GASKET T-STAT COVER NMR TRIANGULAR
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      GASKET T-STAT COVER NMR TRIANGULAR

      ALL FORD AND CHEVY THRU 97 AFTER 98 IT COULD BE ITEM # 0731. This gasket was still used on the carb and TBI engines past '97 thru 2002, i.e. Preditor all LT1 THERMOSTATS can fail and should be tested or replaced if questionable. The type of thermostat...
      $5.15
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    • Impeller Kit W/ O'Ring (GM)
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      Impeller Kit W/ O'Ring (GM)

      Fits PCM GM 305, 350 & 454 thru 2003 and 75 up Ford Escort. Not for 2004 and up PCM Serpentine Belt pumps. W 1-5/8", D 2-9/16" keyed shaft. This is an original equipment Sherwood kit and includes gaskets and o-ring (as required). Replaces PCM PT#...
      $40.75
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