A well-tuned engine starts with the right spark, and the Mercury Quicksilver Spark Plug Champion LFR5A-11 (33-859495Q) delivers exactly that. Designed to handle the unique demands of marine engines, this spark plug ensures smooth starts, efficient combustion, and consistent power on the water. Whether tackling long-haul runs or quick trips to the dock, a reliable ignition system keeps your engine performing at its best.

Built with high-grade materials, this plug resists corrosion and wear from exposure to fuel, moisture, and heat. The V-cut center electrode enhances ignitability, providing a strong, clean burn that helps maintain fuel efficiency and reduces emissions. Designed to meet Mercury’s exacting standards, it’s a direct fit for various outboard motors, making installation hassle-free.

Why It Matters:

• Stronger, More Reliable Spark – Reduces misfires and rough idling for smoother operation.
• Durable Construction – Withstands harsh marine conditions for long-lasting performance.
• Improved Fuel Efficiency – Optimized combustion means better mileage and fewer emissions.

Swapping out worn spark plugs is one of the easiest ways to keep an outboard running strong. Whether refreshing an aging ignition system or performing routine maintenance, this OEM plug helps ensure crisp throttle response and dependable power when you need it.