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 BPR6EFS (Osculati 47.558.26) is a marine spark plug designed for reliable performance in outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It features a 14 mm thread, 19 mm reach, 20.8 mm hex, and factory-set 0.9 mm gap. With integrated resistor and projected insulator tip, it reduces EMI and improves cold starts. Directly interchangeable with Champion RS12YC.
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$ 13.35
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1-2 weeks delivery time NGK BPR6ES (Osculati 47.558.34) is a widely used marine spark plug with a 14 mm thread, 19 mm reach, 20.8 mm hex size, and a 0.9 mm preset gap. It features a projected insulator and internal resistor, ensuring efficient combustion and reduced EMI. Compatible with Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda outboards. Interchangeable with Champion RN9YC.
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$ 10.50
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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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$ 11.43
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1-2 weeks delivery time Osculati 47.558.11 – NGK BPR6HS is a resistor-type spark plug featuring a 14 mm thread, 12.7 mm (1/2") reach, 20.8 mm (13/16") hex, and a copper-core electrode. Factory-gapped for marine use, it offers stable ignition and full RFI suppression for outboards by Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. Champion equivalent: RL87YC.
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$ 14.52
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1-2 weeks delivery time NGK BPR6HS-10 (Osculati 47.558.84) is a short-reach resistor spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a factory-set 1.0 mm gap. It features a projected tip and is optimized for 2-stroke marine engines from Yamaha, Mercury, Suzuki, Honda, Tohatsu, Selva, and Mariner. Directly interchangeable with Champion RL87YC.
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$ 9.60
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1-2 weeks delivery time NGK BPR7HS (Osculati 47.558.46) is a short-reach, resistor-type marine spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a preset 0.7–0.8 mm gap. Designed for 2-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Features a projected tip for cleaner combustion and is equivalent to Champion RL82YC.
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$ 12.86
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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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$ 12.48
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1-2 weeks delivery time High-performance NGK BPZ8HN-10 spark plug (Osculati 47.558.21) designed for optimal combustion and long service life in outboard engines. Commonly used on Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda motors. Cross-compatible with Champion QL78YC. Thread size: M14 × 1.25 mm, reach: 19 mm, hex size: 20.8 mm, gap: 1.0 mm. Ideal for 2-stroke and 4-stroke marine engines.
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$ 21.57
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1-2 weeks delivery time NGK BPZ8HS-10 (Osculati 47.558.45) is a short-reach resistor spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a preset 1.0 mm gap. Designed for 2-stroke marine engines from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Features a projected insulator for better anti-fouling. Fully interchangeable with Champion QL78YC.
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$ 22.66
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1-2 weeks delivery time NGK BPZ8HS-15 (Osculati 47.558.85) is a non-resistor marine spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a wide factory-set 1.5 mm gap. Featuring a cold heat range (8) and projected insulator, it is ideal for 2-stroke high-revving marine engines from Yamaha, Mercury, Suzuki, Tohatsu, Honda, Selva, and Mariner. No Champion equivalent listed.
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$ 20.86
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1-2 weeks delivery time NGK BR5HS (Osculati 47.558.37) is a short-reach, resistor-type marine spark plug designed for 2-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It features a 14 mm thread, 12.7 mm reach, 20.8 mm hex size, and a 0.7–0.8 mm factory-set gap. Cross-compatible with Champion L90C. Ideal for clean combustion in small-displacement engines.
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$ 12.61
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1-2 weeks delivery time NGK BR6ES (Osculati 47.558.86) is a resistor-type marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 20.8 mm hex, and a 0.8 mm preset gap. It has a medium heat range (6) and is widely compatible with both 2-stroke and 4-stroke marine outboards from Yamaha, Mercury, Suzuki, Tohatsu, Honda, Selva, and Mariner. No Champion equivalent is listed.
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$ 10.55
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1-2 weeks delivery time NGK BR6FS spark plug (Osculati 47.558.25) is engineered for marine outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It features a short 12.7 mm reach, 14 mm thread diameter, 20.8 mm hex, and a 0.7–0.9 mm gap. This resistor-type spark plug suppresses radio frequency interference and corresponds to Champion RV9YC and RV8C. Ideal for 2-stroke engines in marine environments.
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$ 12.20
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1-2 weeks delivery time NGK BR6HS (Osculati 47.558.36) is a resistor-type spark plug designed for 2-stroke marine engines. It features a 14 mm thread, short 12.7 mm reach, 20.8 mm hex, and a 0.7–0.8 mm preset gap. Commonly installed in Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda outboards. Cross-compatible with Champion RL86C. Ideal for small- to mid-size engines in saltwater conditions.
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$ 12.03
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1-2 weeks delivery time NGK BR6HS-10 (Osculati 47.558.41) is a resistor-type marine spark plug with M14 × 1.25 mm thread, 12.7 mm reach, 20.8 mm hex, and a factory-set 1.0 mm spark gap. Optimized for 2-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Provides clean ignition with enhanced spark energy. Fully interchangeable with Champion L86C.
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$ 12.56
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1-2 weeks delivery time NGK BR7HS (Osculati 47.558.35) is a compact resistor-type spark plug with a 14 mm thread, 12.7 mm reach, 20.8 mm hex, and preset 0.7–0.8 mm gap. Optimized for 2-stroke marine outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Designed to minimize EMI and fouling. Cross-compatible with Champion RL82C.
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$ 11.54
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1-2 weeks delivery time Osculati 47.558.02 – NGK BR7HS-10 is a resistor-type marine spark plug commonly used in 2-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. With a 14 mm thread, 12.7 mm (1/2") reach, 20.8 mm (13/16") hex, and a 1.0 mm factory-set gap, it ensures strong, clean ignition and protects marine electronics via integrated RFI suppression. Equivalent to Champion L82C.
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$ 12.20
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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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$ 11.23
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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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$ 11.54
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1-2 weeks delivery time Osculati 47.558.09 – NGK BR8-HS-10 is a resistor marine spark plug with a factory-set 1.0 mm gap, ideal for 2-stroke outboards from Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Featuring a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex, it provides stable combustion and protects marine electronics. Cross-referenced to Champion QL78C.
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$ 11.62
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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.