Marine spark plugs are essential components designed to ignite the fuel-air mixture in marine engines, ensuring smooth and efficient performance. Built for outboard and inboard engines, they withstand harsh marine conditions, including exposure to saltwater and humidity.
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1-2 weeks delivery time The Osculati 47.558.98 – NGK ILFR6G is a premium iridium spark plug designed for modern high-performance outboard engines. Featuring a 14 mm thread diameter, 19 mm (3/4") reach, and ultra-fine iridium center electrode, it ensures superior ignition stability, fuel efficiency, and extended service life. Compatible with outboards from Yamaha, Mercury, Suzuki, Tohatsu, Honda, Selva, and Mariner, this plug offers exceptional durability even under heavy marine operating conditions.
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$ 55.91
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1-2 weeks delivery time NGK ITR4A15 (Osculati 47.558.87) is a premium iridium spark plug featuring M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and an extended 1.5 mm factory-set gap. Designed for 4-stroke marine engines from Yamaha, Suzuki, Mercury, Honda, Tohatsu, Selva, and Mariner, this plug offers exceptional ignition precision, corrosion resistance, and lifespan. No Champion cross-reference available.
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$ 41.20
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1-2 weeks delivery time NGK IZFR5G (Osculati 47.558.68) is a premium iridium spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and factory-set 1.1 mm gap. Its ultra-fine iridium center electrode and projected tip ensure precise ignition in 4-stroke EFI outboards from Yamaha, Mercury, Suzuki, Honda, Tohatsu, Selva, and Mariner. Built for long service life and reliability under marine load cycles. No Champion equivalent.
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$ 61.62
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1-2 weeks delivery time NGK IZFR5J (Osculati 47.558.88) is a premium iridium-tipped marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and 1.1 mm factory-set gap. Designed for 4-stroke EFI outboard engines from Yamaha, Honda, Suzuki, Mercury, Tohatsu, Selva, and Mariner. It ensures maximum ignition performance, longevity, and corrosion resistance. No Champion equivalent listed.
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$ 55.72
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1-2 weeks delivery time The Osculati 47.558.99 – NGK IZFR7M is a long-life iridium spark plug engineered for precision ignition in modern outboard engines. With a 14 mm thread diameter, 19 mm (3/4") reach, ultra-fine iridium center electrode, and resistor-type design, it offers optimal combustion, durability, and resistance to fouling. This plug is commonly fitted in high-efficiency engines from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda.
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$ 47.99
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1-2 weeks delivery time NGK IZFR6F-11 (Osculati 47.558.44) is a premium iridium marine spark plug with a 14 mm thread, 19 mm reach, 16 mm hex, and factory-set 1.1 mm gap. Specifically designed for high-performance 4-stroke outboards from Yamaha, Mercury, Suzuki, Honda, Mariner, Selva, and Tohatsu. It features a fine iridium tip and resistor core for optimal combustion and EMI suppression. No Champion equivalent available.
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$ 60.34
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1-2 weeks delivery time NGK IZFR6K-11 (Osculati 47.558.51) is a high-end iridium spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and a factory-set 1.1 mm gap. Engineered for modern 4-stroke marine engines from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Offers superior ignition, durability, and EMI suppression. Cross-reference Champion 3071.
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$ 62.41
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1-2 weeks delivery time NGK LFR4AE (Osculati 47.558.59) is a resistor-type marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and factory-set 0.9 mm gap. Designed for 4-stroke outboards from Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. It features a recessed electrode and colder heat range (4), suitable for high-performance, high-compression engines. No direct Champion equivalent.
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$ 20.96
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1-2 weeks delivery time NGK LFR5A-11 (Osculati 47.558.38) is a long-reach spark plug with a 14 mm thread, 19 mm reach, 16 mm hex size, and factory-set 1.1 mm gap. Designed for modern 4-stroke marine outboards from Yamaha, Mercury, Suzuki, Tohatsu, Selva, Honda, and Mariner. This resistor-type plug features a projected tip for clean combustion and reliable ignition under load. No direct Champion cross-reference available.
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$ 16.09
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1-2 weeks delivery time NGK LFR6A-11 (Osculati 47.558.39) is a long-reach, resistor-type marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and a 1.1 mm preset gap. Commonly installed in 4-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It provides clean combustion and EMI suppression for engines with advanced ignition systems. No direct Champion equivalent.
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$ 18.40
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1-2 weeks delivery time The Osculati 47.558.93 – NGK LKR7E spark plug is a high-performance, marine-grade ignition component designed for compatibility with leading outboard engine brands including Yamaha, Mercury, Suzuki, Tohatsu, Honda, Selva, and Mariner. It features a 14 mm thread diameter, extended 26.5 mm reach, and triple electrode design for enhanced combustion efficiency and longer service life. Ideal for modern multi-valve engines, this plug ensures stable ignition under marine conditions.
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$ 14.32
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1-2 weeks delivery time NGK PZFR6H (Osculati 47.558.64) is a high-performance platinum spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and a factory-set 1.1 mm gap. Designed for modern 4-stroke marine engines by Yamaha, Honda, Mercury, Suzuki, Tohatsu, Selva, and Mariner. Offers exceptional spark stability, EMI suppression, and long service life. No Champion equivalent.
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$ 53.83
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1-2 weeks delivery time The Osculati 47.558.92 – NGK ZFR5F spark plug is a high-quality standard replacement part designed for a wide range of outboard engines. Compatible with major brands such as Mariner, Yamaha, Suzuki, Mercury, Tohatsu, Selva, and Honda, it ensures optimal combustion and reliable performance. Featuring a resistor type construction, thread diameter of 14 mm, and a reach of 19 mm (3/4"), it also cross-references with Champion RC12-LYC.
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$ 13.07
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1-2 weeks delivery time The Osculati 47.558.97 – NGK ZFR6K-11 spark plug is a resistor-type ignition plug with a 14 mm thread, 19 mm (3/4") reach, and a preset 1.1 mm gap. Engineered for modern outboard engines, it provides strong spark performance and long service life. Designed to fit a broad range of outboard engines from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda, it is a robust replacement for high-efficiency combustion under marine conditions.
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$ 16.70
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1-2 weeks delivery time NGK ZFR7F (Osculati 47.558.43) is a high-performance marine spark plug featuring a 14 mm thread, 19 mm reach, 16 mm hex, and a factory-set 0.8 mm gap. It’s designed for 4-stroke outboard engines by Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. The resistor and projected tip ensure precise ignition and EMI suppression. No direct Champion cross-reference is available.
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$ 19.25
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1-2 weeks delivery time Champion Spark Plugs QL76V are engineered for high-performance engines, providing reliable ignition and optimal efficiency, with enhanced durability that improves fuel efficiency and reduces emissions.
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$ 16.87
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1-2 weeks delivery time Champion Spark Plugs QL77JC4 are engineered for exceptional performance and reliability across various engine applications, ensuring efficient combustion, improved fuel economy, and dependable ignition under diverse conditions.
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$ 9.04
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1-2 weeks delivery time Champion Spark Plugs L78V, with product number 2727307 FNI, are designed for optimal engine performance and reliability. They ensure efficient ignition and combustion, contributing to better fuel efficiency and smoother operation, making them suitable for a wide range of vehicles.
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$ 17.15
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1-2 weeks delivery time The Champion Spark Plugs L77JC4, with product number 2727310 FNI, is engineered for reliable performance in various engines. It enhances ignition and fuel combustion, resulting in improved fuel efficiency and overall engine performance, while ensuring durability for long-lasting use.
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$ 5.34
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1-2 weeks delivery time The Champion L86C Spark Plug, with product number 2727312 FNI, is engineered for reliable performance in various engines. Its design enhances durability and ensures optimal combustion, improving overall engine efficiency.
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$ 2.94
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Why is selecting the right spark plug critical for optimal engine performance in marine applications?
Selecting the right spark plug is critical for optimal engine performance in marine applications because it ensures proper ignition, efficient fuel combustion, and reliable operation in harsh conditions. Using the correct part number guarantees compatibility with the engine, maximizing performance and preventing potential damage. This careful selection increases engine efficiency, providing the best experience on the water.
Choosing the correct part number from trusted brands like Champion Spark Plugs helps maintain engine health and ensures smooth, efficient operation on the water.
How do marine spark plugs differ from standard auto parts used in cars?
Marine spark plugs differ from standard auto parts because they are specifically designed to withstand the harsh conditions of marine environments, including exposure to saltwater, humidity, and extreme temperature fluctuations. They often feature corrosion-resistant materials and a more robust construction to handle the unique demands of outboard and inboard engines. These features ensure reliable ignition and optimal performance even in challenging marine applications.