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SPARK PLUGS

Keep your marine engine running smoothly with high-quality spark plugs. At Discount Inboard Marine, you'll find durable marine spark plugs and spark plugs sets for a wide range of inboard motors, all at affordable prices. Visit us online today to browse our selection of marine spark plugs.

  • SPARK PLUG KIT 302/351 (14MM) SPARK PLUG KIT 302/351 (14MM)

    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
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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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  • SPARK PLUG KIT 5.7L GEN 1+ 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...
    $38.05
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  • 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...
    $3.00
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  • SPARK PLUG KIT PLATINUM AC DELCO 5.7L

    SPARK PLUG KIT PLATINUM AC DELCO 5.7L

    Spark Plug Set Replaces Iridium AC Delco 41-101 (Now Delco #14).  Fits: 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 but those are no longer...
    $85.00
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  • SPARK PLUG, IRIDIUM (6.0L) SPARK PLUG, IRIDIUM (6.0L)

    SPARK PLUG, IRIDIUM (6.0L)

    PCM ZR6, INDMAR LY6 (AC 41-110) Superceeds AC 41-974 & AC 41-985.Plug gap PCM likes .040, Indmar Likes .050(Price includes 8 plugs) Iridium Last 500 + hours, clean and inspect anually. Bin Number (ISBN): 110107
    $130.95
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