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Mercruiser Spark Plug Wires

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      • Sierra 18-8800-1 Wiring Plug Set Replaces 84-816761Q5
        $49.99
        $34.99

        Premium 4cyl Spark Plug Wire Set by Sierra For 4 cylinder engines with conventional ignition systems. Used on Mercruiser and OMC 2.5L and 3.0L marine engines. Kit includes coil wire. Kevlar® core for maximum durability and long life. Durable...

        Add to Cart
      • Sierra 18-8810-1 Wiring Plug Set Replaces 84-816761Q16
        $56.49
        $39.49

        Sierra 18-8810-1 Mercruiser Thunderbolt V6 Spark Plug Wire Set Sierra replacement spark plug wire set for Mercruiser Stern Drives. For 6 cylinder engines with Thunderbolt ignition systems. Kit includes coil wire. Kevlar core for maximum durability...

        Add to Cart
      • Sierra 18-8821-1 Spark Plug Wiring Plug Set
        $81.49
        $56.99

        Sierra 18-8821-1 Mercruiser Thunderbolt V8 Gen+ Spark Plug Wire Set Sierra replacement engine parts are designed to meet or exceed OEM requirements. This spark wire set is used on Mercruiser engines. Kit includes coil wire. Kevlar core for maximum...

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      • Sierra 18-8802-1 Wiring Plug Set Replaces 84-816761Q12
        $74.49
        $51.99

        Sierra 18-8802-1 Premium 8 Cyl Spark Plug Wire Set For 8 cylinder GM based engines with conventional ignition systems. Key Features: Kit includes coil wire. Kevlar core for maximum durability and long life. Durable stainless steel wound conductor...

        Add to Cart
      • Sierra 18-8803-2 Wiring Plug Set Replaces 84-816761Q9
        $67.49
        $46.99

        Sierra 18-8803-2 Premium 8 Cyl Spark Plug Wire Set Sierra 18-8803-2 Premium Spark Plug Wire set is for 8 cylinder engines with conventional ignition systems. Used on Mercruiser and OMC V8 GM and Ford marine engines. Features: Kit includes coil...

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      • Sierra 18-8828-1 Wiring Plug Set Replaces 84-863656A1
        $121.99
        $85.49

        Sierra 18-8828-1 Wiring Plug Set For Mercruiser 5.0L MIE MPI V8 with Delco HEI ignition system. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Ignition Type: Delco HEI Wire Lengths: (2) Spark Plug Wires...

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      • Sierra 18-8833-1 Wiring Plug Set Replaces 84-816761K14
        $54.99
        $38.49

        Premium Delco EST 4Cyl Spark Plug Wire Set by Sierra For Mercruiser 3.0LX 4 cylinder engines with Delco EST ignition systems. Kit includes coil wire. Kevlar® core for maximum durability and long life. Durable stainless steel wound conductor for...

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      • Sierra 18-8801-1 Wiring Plug Set Replaces 84-816761Q7
        $65.99
        $50.49

        Sierra 18-8801-1 Premium 6 Cyl. Spark Plug Wire Set For 6 cylinder GM based engines with conventional ignition systems. Features: Kit includes coil wire. Kevlar core for maximum durability and long life. Durable stainless steel wound conductor for...

        Add to Cart
      • Sierra 18-8808-2 Wiring Plug Set Replaces 84-816761Q6
        $68.99
        $48.49

        Mercruiser 4cyl Premium Spark Plug Wire Set by Sierra For 4 cylinder 224CID Mercruiser engines with conventional ignition systems.   Kit includes coil wire. Kevlar® core for maximum durability and long life. Durable stainless steel wound...

        Add to Cart
      • Sierra 18-8811-1 Wiring Plug Set Replaces 84-816761Q13
        $50.49
        $37.99

        Sierra 18-8811-1 Wiring Plug Set For all 4 Cyl. engines with a digital ignition system. Used on Mercruiser and OMC marine engines. Kit includes 5 wires. Key Features: Kevlar core for maximum durability and long life Durable stainless steel wound...

        Add to Cart
      • Sierra 18-8835-1 Spark Plug Wire Set
        $92.99
        $64.99

        Sierra 18-8835-1 Spark Plug Wire Set Sierra replacement spark wire set for Mercruiser Stern Drives. Sierra’s spark plug wire sets are designed exclusively for marine engines and are the highest quality marine sets available anywhere in the...

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      • Sierra 18-8809-1 Wiring Plug Set Replaces 84-816761Q8
        $77.49
        $53.99

        Sierra 18-8809-1 Mercruiser Spark Plug Wire Set For an inline 6 cyl. engine with conventional ignition system. Used on Mercruiser Stern Drives. Kit includes coil wire. Sierra aftermarket parts are manufactured to meet or exceed OEM requirements...

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      • Sierra 18-8822-1 Spark Plug Wire Set
        $108.99
        $75.99

        Sierra 18-8822-1 Spark Plug Wire Set Sierra replacement spark plug wire set for Delco HEI engines. Ignition Type: Delco HEI Wire Lengths: 2 Spark Plug Wires 27.5" 2 Spark Plug Wires 30.5" 2 Spark Plug Wires 39" 2 Spark Plug Wires 41" 1 Coil...

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      • Mercruiser 84-816761Q-4 Spark Plug Wire Kit
        $90.60
        $75.50

        Mercruiser 84-816761Q-4 Spark Plug Wire Kit Genuine OEM Mercury - Mercruiser part. Fits: GM V‑8 305/350 cid engines (LH) w/ Thunderbolt IV ignition (1981‑1992)

        Out of stock

      • Sierra 18-8829-1 Wiring Plug Set Replaces 84-863656A2
        $120.99
        $97.99

        Sierra 18-8829-1 Mercruiser HEI V6 Spark Plug Wire Set For Mercruiser 4.3L MPI with Delco HEI ignition. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Interchangeable with: Mallory 9-28057 Mercury...

        Out of stock

      • CDI 631-0008 Mercruiser Spark Plug Wires
        $70.99
        $50.49

        CDI 631-0008 Mercruiser Spark Plug Wires - 8 QTY This is a set of CDI 631-0008 Mercruiser Spark Plug Wires for 8Cyl Thunderbolt. Fits: Mercruiser 1983-1984 198, 5.0L GM 1985-1995 200, 5.0L GM 1985-1986 228 1981-1995 230, 5.0L/LX MIE 1987-1995...

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      • CDI 631-0011 Spark Plug Wires
        $118.99
        $84.49

        CDI 631-0011 Spark Plug Wires (6 Cyl) Conventional Ignition with Delco Breaker Point Distributor Mercury Marine 470, 485, 488, 3.7L Aluminum Block Engines Fits: Mercruiser 2001-2017 350 MAG MPI ALPHA/BRAVO 2001-2017 350 MAG MPI ALPHA/BRAVO...

        Out of stock

      • CDI 631-0015 Spark Plug Wires
        $64.49
        $45.99

        CDI 631-0015 Spark Plug Wires (6 Cyl) Conventional Ignition with Delco Breaker Point Distributor Mercury Marine 470, 485, 488, 3.7L Aluminum Block Engines Fits: Mercruiser 1987 165 (224c.i.) 1985-1989 165, 170, 190 (224CID) 1985-1986 170 (224c...

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      MerCruiser Spark Plugs Wires

      Over time, salt spray, humidity, and UV rays take their toll on many boat systems, even those that are not readily visible. That is why it is so important to routinely check your Mercruiser spark plugs, wires, and wiring harness for signs that its service life is over. If your plugs are pitted and your engine performance has diminished, their replacement is a no-brainer. With wiring it is a bit harder to tell.

      There are two schools of thought here. Those boaters who push the envelope and replace their Mercruiser sparks and wiring only when one or both fail, and those who watch their engine hours and replace each according to their manufacturer’s recommendations.

      Need Help Selecting the Right Mercruiser Spark Plugs/Wires?

      Whichever type of boater you are, know that when your Mercruiser spark plugs and wires are in need of replacement that you’ll find just what you need, and receive it just as quickly. Wholesale stocks a wide range of wiring harnesses by Sierra a name boaters trust. If you’re not certain exactly what part you’ll need, you have two options.

      Be sure to use our convenient parts selector to find just the right Mercruiser spark plugs and wires for your engine. If you’d prefer, speak with one of our knowledgeable representatives. We’re here to serve you Monday through Friday from 9:00 AM until 6:00 PM EST at (877) 388-2628. For even greater savings, don’t forget to ask us about our Captain’s Club Rewards Program. This way you’ll accrue points you can redeem the very next time you shop at Wholesale Marine!