SKU:
Osculati-47.558.06
€ 6,69
1-2 weeks delivery time
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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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Osculati 47.558.06 – NGK B9HS-10 Spark Plug
The Osculati 47.558.06 features the NGK B9HS-10 spark plug, purpose-built for high-RPM 2-stroke marine engines. It includes a factory-set 1.0 mm gap for precise ignition timing and a copper core for optimal heat dissipation. With a cold heat range of 9, it resists fouling in high-performance applications. This non-resistor plug is a direct replacement for Champion L77JC4.
Main Features:
- Model: NGK B9HS-10
- Thread Size: 14 mm
- Reach: 12.7 mm (1/2")
- Hex Size: 20.8 mm (13/16")
- Resistor: No
- Pre-set Gap: 1.0 mm
- Heat Range: 9 (cold)
- Electrode Type: Standard tip, copper core
- Champion Equivalent: L77JC4
Application Notes:
- Ideal for high-revving 2-stroke marine outboards
- Not recommended for engines requiring RFI suppression
- Designed to prevent pre-ignition in high-load applications
Benefits:
- Factory-gapped for consistent ignition timing (1.0 mm)
- Cold rating prevents fouling in performance applications
- High thermal conductivity for extended plug life
- Reliable operation in saltwater marine environments
Technical Specifications Table:
Parameter Value Item Code 47.558.06 Model NGK B9HS-10 Thread Size 14 mm Reach 12.7 mm (1/2") Hex Size 20.8 mm (13/16") Resistor No Pre-set Gap 1.0 mm Heat Range 9 Champion Equivalent L77JC4 Application 2-stroke high-performance outboard engines
The Osculati 47.558.06 – NGK B9HS-10 spark plug is a reliable choice for marine professionals who maintain high-speed 2-stroke engines. Its colder rating and pre-set gap support superior performance and fouling resistance under demanding marine conditions.
Documents
Osculati Catalogue 2025 - page 874 Size: 150,5 Kb -
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