Mercury Marine 8M0104881 Spark Plug Wire Sets Spark plug wires don't fail dramatically — they degrade gradually, and that gradual degradation is exactly what makes them easy to overlook during routine maintenance. The Mercury Marine 8M0104881 Spark Plug Wire Set is a genuine OEM replacement set built specifically for compatible Mercury engines, restoring the clean, consistent spark delivery that keeps your engine running the way it should. Over time, spark plug wire insulation breaks down from heat cycling, ozone exposure, and the constant vibration of a running engine. As the insulation degrades, resistance increases, and the wire's ability to deliver a strong, consistent spark to the plug diminishes. The result shows up as misfires, rough idle, hesitation under load, or a general loss of power that's easy to attribute to other causes. Swapping the wire set is often the fix that clears up ignition issues that have been chased for a while. As a genuine Mercury Marine OEM set, the 8M0104881 is engineered to the correct wire length, boot configuration, and suppression specifications for compatible Mercury engines. The boots are designed to seal properly against the plug and coil connections, and the wire construction meets Mercury's standards for heat resistance and electrical performance in a marine environment, where the combination of moisture, heat, and vibration is harder on ignition components than almost any other application. Key Features: Genuine Mercury Marine OEM spark plug wire set Part Number: 8M0104881 OEM wire lengths, boot configuration, and suppression specs Built for heat resistance and performance in marine environments Direct replacement — no modification required Confirm your engine's model and serial number before ordering. Mercury spark plug wire sets are engine-specific, and verifying the correct set for your application ensures proper boot fit, correct wire routing, and full ignition performance from the first start. Normalized SKU: 8M0104881UPC Code: 745061953161

EMP 300-02407 Spark Plug Wire SetsThis product replaces:840080440668Normalized SKU: 30002407UPC Code: 840080440668

United Ignition Wire 3020C Spark Plug Wire Sets United Ignition Wire Universal Conventional Coil Wire #3020C Universal coil wire engineered for conventional ignition systems on marine engines. Delivers reliable spark transmission from ignition coil to distributor cap across a wide range of engine configurations. Heavy-duty insulation resists heat, moisture, and saltwater corrosion. Direct replacement simplifies maintenance on legacy and modern marine power plants. Compatible with standard ignition architectures where coil-to-distributor connectivity is required. Normalized SKU: 3020C

Balmar 511-9902 Spark Plug Wire SetsSpark Plug Wire Extension KitSpark Plug Wire Extension Kit offers 9.5" of spark plug wire extension. Features: Spark Plug Wire Extension Kit Offers 9.5" of spark plug wire extension This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Normalized SKU: 5119902