SKU:
Osculati-47.558.07
€ 8,54
1-2 weeks delivery time
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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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Osculati 47.558.07 – NGK BR9HS-10 Spark Plug
The Osculati 47.558.07 features the NGK BR9HS-10 spark plug, a marine-grade resistor plug developed for high-speed 2-stroke engines. It includes a built-in 5 kΩ resistor to suppress RFI (radio frequency interference), ensuring compatibility with marine electronics such as GPS, sonar, and VHF. The copper core electrode and colder heat range provide excellent thermal control and resistance to pre-ignition in high-load applications. Factory-gapped at 1.0 mm. Cross-reference: Champion QL77JC4.
Main Features:
- Model: NGK BR9HS-10
- Thread Size: 14 mm
- Reach: 12.7 mm (1/2")
- Hex Size: 20.8 mm (13/16")
- Resistor: Yes – 5 kΩ RFI suppression
- Pre-set Gap: 1.0 mm
- Heat Range: 9 (cold)
- Core Type: Copper core
- Champion Equivalent: QL77JC4
Compatible Engine Brands:
- Yamaha
- Mariner
- Mercury
- Suzuki
- Tohatsu
- Selva
- Honda (2-stroke series)
Benefits:
- Suppresses electrical interference for safe use with electronics
- Cold heat rating suitable for high-revving engines
- Factory-gapped for precise ignition and easy installation
- Engineered to resist fouling and ensure long-term spark stability
Technical Specifications Table:
Parameter Value Item Code 47.558.07 Model NGK BR9HS-10 Thread Size 14 mm Reach 12.7 mm (1/2") Hex Size 20.8 mm (13/16") Resistor Yes (5 kΩ) Pre-set Gap 1.0 mm Heat Range 9 (cold) Champion Equivalent QL77JC4 Application High-RPM 2-stroke marine outboards
The Osculati 47.558.07 – NGK BR9HS-10 spark plug is a reliable and electronics-safe solution for high-performance outboard engines. It ensures clean, stable combustion and protects sensitive onboard systems—perfect for modern 2-stroke setups.
Documents
Osculati Catalogue 2025 - page 874 Size: 150,5 Kb -
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