NGK B8-HS-10 Spark Plug – Osculati 47.558.08

Osculati 47.558.08 – NGK B8-HS-10 Spark Plug

The Osculati 47.558.08 features the NGK B8-HS-10 spark plug, designed for 2-stroke marine outboards operating under regular to moderate thermal load. It is a non-resistor type plug that delivers direct spark energy to the ignition system, with a 1.0 mm pre-set gap for easy installation and consistent firing. Built for compatibility with leading engine brands, it cross-references with Champion L78C.

Main Features:

• Model: NGK B8-HS-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: 8 (cool-medium)
• Electrode: Standard tip with copper core
• Champion Equivalent: L78C

Compatible Engine Brands:

• Mariner
• Yamaha
• Suzuki
• Mercury
• Tohatsu
• Selva
• Honda (2-stroke models)

Benefits:

• Non-resistor design for strong ignition output
• Pre-gapped at 1.0 mm for accurate timing and easy replacement
• Excellent marine corrosion resistance and anti-fouling performance
• Trusted by OEMs and marine technicians worldwide

Technical Specifications Table:

The Osculati 47.558.08 – NGK B8-HS-10 spark plug is ideal for classic and modern 2-stroke marine outboards where a strong, resistor-free ignition path is needed. Its 1.0 mm factory-set gap and cooler heat rating make it ideal for sustained performance in marine environments.