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Osculati 47.558.66 – NGK BP7HS-10 Marine Spark Plug
The NGK BP7HS-10 (Osculati 47.558.66) is a standard-type, projected insulator spark plug optimized for 2-stroke marine engines operating at moderate to high speeds. With a cold heat range and 1.0 mm pre-set gap, it provides efficient ignition under varying loads. The plug’s non-resistor configuration ensures maximum spark energy transfer, making it especially suitable for older ignition systems without sensitive electronics.
Key Features:
- Non-resistor type for high spark energy and minimal voltage drop
- Projected insulator improves flame front and reduces fouling
- Short thread reach (12.7 mm) ideal for 2-stroke outboards
- Cold heat range (7) resists pre-ignition during high-RPM operation
- Wide 1.0 mm gap for reliable cold starts and clean burn
Technical Specifications:
Attribute Value Model NGK BP7HS-10 Osculati Code 47.558.66 Thread Diameter M14 × 1.25 mm Reach 12.7 mm Hex Size 20.8 mm Heat Range 7 (cold) Gap 1.0 mm Electrode Type Standard with projected tip Resistor No
Manufacturer Compatibility:
- Yamaha
- Mercury
- Mariner
- Suzuki
- Tohatsu
- Selva
- Honda
Cross Reference:
Brand Model NGK BP7HS-10 Champion –
The NGK BP7HS-10 spark plug is designed for boaters and mechanics who demand reliable ignition, especially in 2-stroke outboards subject to variable load and throttle conditions. Its extended tip and wide spark gap offer improved fuel burn and reduced risk of plug fouling, making it ideal for both recreational and professional marine applications.
Documents
Osculati Catalogue 2025 - page 874 Size: 150,5 Kb -