Osculati 47.558.63 – NGK BZ7HS-10 Marine Spark Plug
The NGK BZ7HS-10 (Osculati 47.558.63) is a marine-grade spark plug designed for 2-stroke outboard engines requiring precise ignition performance and environmental durability. It features a 1.0 mm factory-set gap, a built-in resistor to suppress electronic interference, and a corrosion-resistant zinc-coated shell for long service life in saltwater conditions. Its short reach makes it compatible with many compact cylinder head designs common in portable and mid-range marine engines.
Key Features:
- Factory-set 1.0 mm gap for optimal ignition in 2-stroke engines
- Short 12.7 mm reach ideal for compact combustion chambers
- Resistor construction reduces EMI for compatibility with digital ignition systems
- Zinc-dipped shell offers strong resistance to corrosion in marine use
- Designed for steady ignition under variable load and RPM conditions
Technical Specifications:
| Attribute | Value |
|---|---|
| Model | NGK BZ7HS-10 |
| Osculati Code | 47.558.63 |
| Thread Diameter | M14 × 1.25 mm |
| Reach | 12.7 mm |
| Hex Size | 20.8 mm |
| Heat Range | 7 |
| Gap | 1.0 mm |
| Electrode Type | Standard |
| Resistor | Yes |
Manufacturer Compatibility:
- Yamaha
- Mercury
- Suzuki
- Honda
- Tohatsu
- Selva
- Mariner
Cross Reference:
| Brand | Model |
|---|---|
| NGK | BZ7HS-10 |
| Champion | – |
The NGK BZ7HS-10 is purpose-built for saltwater reliability and electronic ignition compatibility in 2-stroke outboard engines. With its stable spark, corrosion-proof housing, and high thermal tolerance, it’s a go-to solution for marine technicians maintaining small- to mid-range outboards in tough environments.
