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 Osculati 47.557.51 – Champion QL77CC is a marine-grade resistor spark plug designed for 2-stroke outboard engines. With a 14 mm thread, 9.5 mm (3/8") reach, and 21 mm (13/16") hex, it features integrated RFI suppression, reliable ignition performance, and strong resistance to fouling in saltwater applications.
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€ 7,22
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1-2 weeks delivery time Osculati 47.557.59 – Champion QC10WEP is a marine resistor spark plug designed for 4-stroke high-output engines. With a 14 mm thread, 19 mm (3/4") reach, and 16 mm (5/8") hex, it features a copper core, projected tip, and integrated RFI suppression, offering superior ignition, durability, and compatibility with sensitive marine electronics.
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€ 9,75
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1-2 weeks delivery time Osculati 47.557.60 – Champion QC8WEP is a high-performance resistor spark plug designed for 4-stroke marine engines. With a 14 mm thread, 19 mm (3/4") reach, and 16 mm (5/8") hex, it features a copper core, projected nose, and built-in RFI suppression, ensuring stable ignition, clean combustion, and compatibility with onboard electronics.
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€ 11,40
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1-2 weeks delivery time Osculati 47.558.01 – NGK B7HS is a non-resistor marine spark plug designed for use in a wide range of 2-stroke outboard engines. With a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex, it provides reliable cold starts, strong spark, and excellent performance in engines from Mariner, Yamaha, Mercury, Suzuki, Tohatsu, Selva, and Honda. Equivalent to Champion L82C.
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€ 5,79
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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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€ 8,41
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1-2 weeks delivery time Osculati 47.558.03 – NGK B8HS is a non-resistor marine spark plug with a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex. Designed for standard use in 2-stroke outboards by Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. Offers strong ignition performance and reliable combustion. Equivalent to Champion L78C.
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€ 5,84
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1-2 weeks delivery time Osculati 47.558.06 – NGK B9HS-10 is a marine-grade spark plug designed for 2-stroke outboard engines operating at high RPM. It features a 14 mm thread, 12.7 mm (1/2") reach, 20.8 mm (13/16") hex, and a factory-set 1.0 mm gap. Designed for performance and durability, it is equivalent to Champion L77JC4.
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€ 6,69
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1-2 weeks delivery time Osculati 47.558.07 – NGK BR9HS-10 is a resistor-type spark plug designed for high-RPM 2-stroke outboards from brands like Yamaha, Mercury, Suzuki, Tohatsu, Mariner, 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 sensitive onboard electronics. Equivalent to Champion QL77JC4.
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€ 8,54
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1-2 weeks delivery time Osculati 47.558.08 – NGK B8-HS-10 is a non-resistor marine spark plug with a factory-set 1.0 mm gap. Featuring a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex, it delivers high ignition efficiency and stable combustion in 2-stroke outboards by Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. Equivalent to Champion L78C.
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€ 7,04
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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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€ 8,01
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1-2 weeks delivery time Osculati 47.558.10 – NGK B7HS-10 is a non-resistor spark plug with a factory-set 1.0 mm gap, built for reliable ignition in 2-stroke marine outboards by Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It features a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex. Equivalent to Champion L77JC4.
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€ 6,78
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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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€ 10,01
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1-2 weeks delivery time Osculati 47.558.12 – NGK B6HS is a non-resistor spark plug with a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex. Designed for smooth ignition and high durability in 2-stroke marine outboards from Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. It corresponds to Champion L86C.
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€ 5,72
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1-2 weeks delivery time Osculati 47.558.13 – NGK BP6HS is a non-resistor, projected-tip spark plug designed for reliable marine ignition in 2-stroke and 4-stroke outboards. With a 14 mm thread, 12.7 mm (1/2") reach, 20.8 mm (13/16") hex, and a medium-hot heat range, it fits engines by Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. Equivalent to Champion L87YC.
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€ 5,68
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1-2 weeks delivery time Osculati 47.558.14 – NGK BP7HS is a projected-tip, non-resistor marine spark plug with a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex. Designed for enhanced combustion in 2-stroke outboards by Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. Medium heat range and excellent anti-fouling properties. Cross-reference: Champion L82YC.
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€ 6,25
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1-2 weeks delivery time Osculati 47.558.15 – NGK CR4HSB is a compact resistor-type spark plug for small-displacement marine outboards. It features a 10 mm thread, 12.7 mm (1/2") reach, 16 mm hex, and a projected-tip copper core electrode. Common in 4-stroke outboards from Yamaha, Mercury, Honda, Tohatsu, and Suzuki. No Champion equivalent.
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€ 8,80
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1-2 weeks delivery time Osculati 47.558.16 – NGK CR6E is a resistor-type spark plug with a 10 mm thread, 19 mm (3/4") reach, and 16 mm hex. It features a projected copper core electrode and is factory-gapped for 4-stroke marine outboards from Honda, Yamaha, Suzuki, Mercury, Mariner, Tohatsu, and Selva. No Champion equivalent.
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€ 14,08
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1-2 weeks delivery time Osculati 47.558.17 – NGK DR5HS is a resistor-type spark plug with a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex. Designed for smooth combustion and RFI protection in 2-stroke marine engines by Yamaha, Mercury, Suzuki, Tohatsu, Selva, Mariner, and Honda. Champion equivalent: P10Y.
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€ 8,99
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1-2 weeks delivery time Osculati 47.558.18 – NGK DR6HS is a resistor-type spark plug with a 14 mm thread, 12.7 mm (1/2") reach, and 20.8 mm (13/16") hex. Designed for 2-stroke marine outboards by Yamaha, Mercury, Mariner, Suzuki, Tohatsu, Selva, and Honda. It provides RFI protection and stable combustion with medium heat range. Champion equivalent: P8Y.
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€ 8,69
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1-2 weeks delivery time Osculati 47.558.19 – NGK DR7EA is a resistor-type spark plug with a 12 mm thread, 19 mm (3/4") reach, and 18 mm hex, ideal for modern 4-stroke marine engines. It offers clean combustion, RFI suppression, and durability in Yamaha, Mercury, Suzuki, Honda, Tohatsu, Selva, and Mariner engines. Champion equivalent: RA8HC.
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€ 8,87
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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.