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  • Transmissions/Silencers
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    • 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.

    • 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...
      $3.75
      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...
      $99.00
      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...
      $118.40
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    • 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...
      $130.95
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    • 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...
      $871.00
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    • PROTEC RETRO KIT, 350/454 PROTEC RETRO KIT, 350/454
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      PROTEC RETRO KIT, 350/454

      GM 5.7L & 7.4L (LH or RH rotation) Distributor kit, originally designed for PCM ProTec engines to replace the coil pack ignition. Current kit includes Prestolite Electronic distributor (no ballast resistor required), a new engine wiring harness,...
      $690.50
      Add to Cart
    • RELAY 12V GM PCM FUEL PUMP/SYSTEM R130012 RELAY 12V GM PCM FUEL PUMP/SYSTEM R130012
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      RELAY 12V GM PCM FUEL PUMP/SYSTEM R130012

      RELAY, 12V GM PCM FUEL PUMP/SYSTEM R130012 Fits: most GM EFI Fuel Pump and ECM. PCM Excalibur and Pro Sport S/N 420000 thru 440611 fuel pump, ignition, and starter. It also can be used to replace 96 up Bosch 12077864 relays used by Indmar Pt...
      $28.17
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