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  • Engine
  • Transmissions/Silencers
  • Underwater-Gear/Steering
  • Maintenance
  • Accessories
  • Clothing, Hats, and Gifts

    • Shop by Brand

  • ARCO
  • Indmar
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  • View all Brands

    • ELECTRICAL and TUNE UP

    Your watercraft is an investment and one that you put a lot of time and money into. Keep it running its absolute best with inboard boat tune-up kits and accessories from Discount Inboard Marine. Whether you're shopping for a marine alternator, a tune-up kit or spark plugs, we have everything you need to maintain or repair your inboard ski boat. Discover why boaters around the world trust and rely on Discount Inboard Marine.

    • CIRCUIT BREAKER 40 AMP R153006A
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      CIRCUIT BREAKER 40 AMP R153006A

      What is a Circuit breaker? It's an electro-mechanical device specifically designed to protect electrical circuits from a circuit overload. It interrupts the current flow when a fault is detected. The surge of current automatically...
      $82.01
      Add to Cart
    • SPARK PLUG KIT 5.7L GEN 1+
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      SPARK PLUG KIT 5.7L GEN 1+

      Spark Plug Kit Vortec 5.7L AUTOLITE RP030008: Fits: Vortec 5.7  GM Vortec 300+ HP (Rep. MR43LTS) Includes 8. The Vortec engines have the intake manifold bolts installed going straight down non Vortec bolts are angled. PLUG GAP .045. but...
      $51.50
      Add to Cart
    • CIRCUIT BREAKER 50 AMP
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      CIRCUIT BREAKER 50 AMP

      What is a Circuit breaker? It's an electro-mechanical device specifically designed to protect electrical circuits from a circuit overload. It interrupts the current flow when a fault is detected. The surge of current automatically...
      $129.53
      Add to Cart
    • SPARK PLUG GM VORTEC 5.7 SPARK PLUG GM VORTEC 5.7
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      SPARK PLUG GM VORTEC 5.7

      NGK TR5 Spark Plug GM VORTEC 350 Carb or EFI: Fits: VORTEC 350, REPLACES MR43LTS NGK V-Power plugs feature a unique v-cut in the center electrode that directs the spark to the edge of the electrode, helping the spark develop more rapidly, increasing...
      $4.23
      Add to Cart
    • CIRCUIT BREAKER 60 AMP
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      CIRCUIT BREAKER 60 AMP

      What is a Circuit breaker? It's an electro-mechanical device specifically designed to protect electrical circuits from a circuit overload. It interrupts the current flow when a fault is detected. The surge of current automatically...
      $192.72
      Add to Cart
    • SPARK PLUG KIT PLATINUM VORTEC 5.7L
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      SPARK PLUG KIT PLATINUM VORTEC 5.7L

      Spark Plug Set Replaces Iridium AC Delco 41-101, 41-932 and 41-993 (Now Delco #14).  Fits: 1996 UP VORTEC GM 5.0 and 5.7 PCM & Indmar engines Bin Number (ISBN): 200418 Please note that these plugs are now platinum. The old plugs were iridum...
      $150.75
      Add to Cart
    • SPARK PLUG, (6.0L) SPARK PLUG, (6.0L)
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      SPARK PLUG, (6.0L)

      PCM ZR6, ZR409, VR4, INDMAR LY6 (AC 41-110) Supersedes AC 41-974 & AC 41-985.Plug gap PCM likes .040, Indmar Likes .050(Price includes 8 plugs) Last 300-500 hours. Clean and inspect annually.   *Please note that these plugs are now platinum. The...
      $157.10
      Add to Cart
    • PROTEC RETRO FORD 351 DISTRIBUTOR KIT LH PROTEC RETRO FORD 351 DISTRIBUTOR KIT LH
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      PROTEC RETRO FORD 351 DISTRIBUTOR KIT LH

      Protec Retro Distributor Kit Ford Left Hand Rotation 351 RK107025A: Fits: Some PCM & All Indmar (with mods) Ford 351 *FITS PCM PLD & PLP MODEL NUMBERS  Converts Protec Ignition to Electronic Distributor OEM PCM Kit - Everything You...
      $1,045.20
      Add to Cart
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