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 NGK BPR7HS-10 (Osculati 47.558.47) is a resistor-type marine spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a 1.0 mm preset gap. Specially designed for 2-stroke marine engines from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It features a projected insulator and enhanced gap for improved combustion. Fully interchangeable with Champion RL82YCC.
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€ 8,61
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1-2 weeks delivery time NGK DCPR6E (Osculati 47.558.48) is a resistor-type spark plug with M12 × 1.25 mm thread, 19 mm reach, 16 mm hex size, and 0.9 mm factory-set gap. Designed for high-efficiency 4-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Its compact profile with a projected tip ensures clean combustion and precise ignition. Cross-compatible with Champion RA8HC.
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€ 14,03
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1-2 weeks delivery time NGK BKR6E (Osculati 47.558.49) is a long-reach resistor-type marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and a factory-set 0.8 mm gap. It features a projected insulator and copper core for efficient combustion. Suitable for 4-stroke outboards from Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. Equivalent to Champion RC12YC.
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€ 8,29
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1-2 weeks delivery time NGK CR5HSB (Osculati 47.558.50) is a compact resistor spark plug with M10 × 1.0 mm thread, 12.7 mm reach, 16 mm hex, and a factory-set 0.7–0.8 mm gap. Designed for small-displacement 4-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Provides excellent anti-fouling performance and EMI suppression. Equivalent to Champion 79Y.
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€ 8,66
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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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€ 43,03
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1-2 weeks delivery time NGK CR5EH-9 (Osculati 47.558.53) is a compact resistor-type spark plug with M10 × 1.0 mm thread, 19 mm reach, 14 mm hex, and a factory-set 0.9 mm gap. Designed for small-displacement 4-stroke marine outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Provides precise ignition, reduced fouling, and full compatibility with Champion 79Y.
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€ 18,53
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1-2 weeks delivery time NGK BU8H (Osculati 47.558.55) is a non-resistor marine spark plug with M14 × 1.25 mm thread, 9.5 mm reach, and a 21 mm hex. Designed for high-load 2-stroke outboards by Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Its wide housing and hot heat range ensure consistent ignition in engines prone to fouling. Equivalent to Champion L6VC.
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€ 12,41
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1-2 weeks delivery time NGK BR8HS (Osculati 47.558.56) is a short-reach resistor-type spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and factory-set gap of 0.7–0.8 mm. Ideal for 2-stroke marine engines from Yamaha, Mercury, Mariner, Suzuki, Honda, Tohatsu, and Selva. Its cold heat range prevents pre-ignition under high RPMs. Fully interchangeable with Champion QL75C.
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€ 7,96
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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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€ 14,45
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1-2 weeks delivery time NGK ILFR6GE (Osculati 47.558.60) is a premium iridium spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and a factory-set 1.1 mm gap. Built for high-efficiency 4-stroke outboard engines from Mercury, Yamaha, Suzuki, Honda, Tohatsu, Selva, and Mariner. Features iridium center electrode and platinum ground electrode for extended life and precise ignition under all loads. No direct Champion equivalent.
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€ 37,19
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1-2 weeks delivery time NGK CPR6EA-9 (Osculati 47.558.62) is a resistor spark plug featuring M10 × 1.0 mm thread, 19 mm reach, 16 mm hex, and a factory-set 0.9 mm gap. Its compact body and projected insulator tip make it ideal for tight-fitting 4-stroke outboards by Yamaha, Honda, Mercury, Suzuki, Tohatsu, Selva, and Mariner. Offers stable combustion, reduced fouling, and EMI protection. No Champion equivalent.
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€ 14,22
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1-2 weeks delivery time NGK BZ7HS-10 (Osculati 47.558.63) is a short-reach resistor spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a 1.0 mm preset gap. Specifically engineered for 2-stroke marine engines from Yamaha, Mercury, Suzuki, Tohatsu, Selva, and Honda. Its zinc-dipped shell resists corrosion in saltwater environments. No direct Champion equivalent.
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€ 15,93
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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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€ 37,12
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1-2 weeks delivery time NGK BP7HS-10 (Osculati 47.558.66) is a non-resistor spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a wide 1.0 mm factory-set gap. Built for 2-stroke marine outboards by Yamaha, Honda, Mercury, Suzuki, Tohatsu, Selva, and Mariner. It features a projected insulator for improved ignition efficiency and fouling resistance. No direct Champion equivalent.
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€ 6,90
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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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€ 42,49
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1-2 weeks delivery time NGK BPR6FS (Osculati 47.558.71) is a short-reach resistor-type spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a factory-set 0.7–0.8 mm gap. Designed for 2-stroke and select 4-stroke marine outboards by Yamaha, Mercury, Suzuki, Honda, Tohatsu, Selva, and Mariner. It features a projected tip and a built-in resistor for clean combustion and EMI protection. No Champion equivalent.
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€ 7,88
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1-2 weeks delivery time NGK B6S (Osculati 47.558.74) is a non-resistor marine spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and 0.7 mm standard gap. Suited for legacy 2-stroke marine engines by Yamaha, Mercury, Suzuki, Tohatsu, Honda, Selva, and Mariner. Offers stable spark and strong performance in simple ignition systems. Fully interchangeable with Champion J8C.
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€ 6,53
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1-2 weeks delivery time NGK BR9ES (Osculati 47.558.75) is a cold-range, long-reach resistor spark plug with M14 × 1.25 mm thread, 19 mm reach, 20.8 mm hex, and factory-set 0.7 mm gap. Designed for high-RPM 2-stroke marine engines by Yamaha, Suzuki, Mercury, Tohatsu, Selva, Honda, and Mariner. The built-in resistor protects onboard electronics from EMI. No direct Champion equivalent.
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€ 8,20
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1-2 weeks delivery time NGK BR8ES (Osculati 47.558.76) is a resistor-type marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 20.8 mm hex, and a 0.7 mm factory-set gap. It features a cold heat range (8), making it ideal for high-load, high-RPM 2-stroke outboard engines used by Yamaha, Mercury, Suzuki, Tohatsu, Selva, Honda, and Mariner. It ensures EMI protection and stable ignition under marine operating conditions. No Champion equivalent.
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€ 7,74
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1-2 weeks delivery time NGK CR9EB (Osculati 47.558.77) is a short-reach, resistor-type spark plug with M10 × 1.0 mm thread, 19 mm reach, 16 mm hex, and 0.7 mm preset gap. Built for high-revving marine 4-stroke engines by Yamaha, Honda, Suzuki, Mercury, Tohatsu, Selva, and Mariner. Its cold heat range (9) resists detonation under load. Direct Champion equivalent: RG4-PHP.
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€ 14,31
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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.