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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.

  • CIRCUIT BREAKER 12.5 AMP

    CIRCUIT BREAKER 12.5 AMP

    Circuit Breaker 12.5 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...
    $71.15
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  • DUI DISTRIBUTOR GM 350/454 LH

    DUI DISTRIBUTOR GM 350/454 LH

    Davis Unified Ignition Marine Distributor GM 5.7 & 454 carbureted engines. It fits left and right-hand rotation engines thru the 1980's that reverse engine rotation using a timing gear (not chain). If you're looking for a simple, powerful solution...
    $468.75
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  • CIRCUIT BREAKER 15 AMP CIRCUIT BREAKER 15 AMP

    CIRCUIT BREAKER 15 AMP

    USED ON PCM GT40 ENGINES ALONG WITH A 60 AMP AND A 15 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...
    $48.00
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  • ALTERNATOR, NMR LT1/LTR REPLACEMENT ALTERNATOR, NMR LT1/LTR REPLACEMENT

    ALTERNATOR, NMR LT1/LTR REPLACEMENT

    Replaces Indmar LT1 "Corvette" and LTR "Northstar" 1994-2001 (55 AMP) alternators PT#75-5024 (S755024). Purple wire is for keyed 12 volt source (excite wire, ignition circuit). Red wire goes to constant hot. NOT for Ford 351.   Bin Number...
    $198.35
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  • CAP, DISTRIBUTOR (HVS)

    CAP, DISTRIBUTOR (HVS)

    HVS Distributor Cap Vortec RA108009: Fits: 2002 UP PCM 5.0 & 5.7 MPI, 2006 UP INDMAR (a few were Delco in 06) MCX, Monsoon, LCR, RTP 1, Assault.* Rotor sold separately here.* Gap plugs .060" platinum or iridium plugs recommended...
    $56.95
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  • SPARK PLUG EACH GM STNDRD EGNS SPARK PLUG EACH GM STNDRD EGNS

    SPARK PLUG EACH GM STNDRD EGNS

    NGK Spark Plug Standard GM Engines 5.7L 454 NGKBR6FS: Fits: Most GM Engines Up To Around 1997 - 5.7 454 Does NOT Fit: Indmar LT1 engines  Note: Sold Individually - Order Quantity 8 * NGKBR6FS Direct Cross To MR43T Bin Number (ISBN): 92718
    $3.45
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  • VORTEC ENGINE DISTRIBUTOR ROTOR (HVS) VORTEC ENGINE DISTRIBUTOR ROTOR (HVS)

    VORTEC ENGINE DISTRIBUTOR ROTOR (HVS)

    Vortec Engine Distributor Rotor (HVS) R103011: Fits: 2002 Up PCM 5.0 & 5.7 MPI  2006 Up Indmar (a few were Delco in 06) MCX, Monsoon, LCR, RTP 1, Assault Cap sold separately Item RA108009 Vortec Engine Distributor Cap Rotor (HVS)...
    $22.95
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  • CIRCUIT BREAKER 40 AMP R153006A

    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...
    $49.00
    Add to Cart
  • SPARK PLUG KIT 5.7L GEN 1+

    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...
    $34.50
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  • CIRCUIT BREAKER 50 AMP

    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...
    $59.00
    Add to Cart
  • SPARK PLUG GM VORTEC 5.7 SPARK PLUG GM VORTEC 5.7

    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...
    $3.40
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