SKU:
Osculati-47.558.56
€ 7,96
1-2 weeks delivery time
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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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Osculati 47.558.56 – NGK BR8HS Marine Spark Plug
The NGK BR8HS (Osculati 47.558.56) is a resistor-type spark plug designed for 2-stroke outboard engines operating under high load and at elevated RPMs. With its short 12.7 mm reach, standard electrode, and cold heat range (8), it ensures optimal thermal control and detonation resistance. The built-in resistor protects sensitive marine electronics by suppressing electromagnetic interference (EMI).
Key Features:
- Cold heat range (8) for high-RPM and high-temperature applications
- Integrated resistor to suppress radio and electronic interference
- Short 12.7 mm thread reach ideal for 2-stroke engine cylinder heads
- Nickel alloy ground and center electrodes for corrosion resistance
- Engineered to prevent fouling and pre-ignition in marine conditions
Technical Specifications:
Attribute Value Model NGK BR8HS Osculati Code 47.558.56 Thread Diameter M14 × 1.25 mm Reach 12.7 mm Hex Size 20.8 mm Heat Range 8 (cold) Gap 0.7 – 0.8 mm Electrode Type Standard Resistor Yes
Manufacturer Compatibility:
- Yamaha
- Mercury
- Mariner
- Suzuki
- Tohatsu
- Selva
- Honda
Cross Reference:
Brand Model NGK BR8HS Champion QL75C
The NGK BR8HS is recommended for high-output 2-stroke marine engines, particularly those subject to full-throttle operation. Its thermal characteristics make it ideal for preventing pre-ignition and maintaining consistent spark delivery in performance outboards exposed to prolonged load cycles and saltwater exposure.
Documents
Osculati Catalogue 2025 - page 874 Size: 150,5 Kb -
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