Osculati 47.558.40 – NGK CR6HS Marine Spark Plug
The NGK CR6HS (Osculati 47.558.40) spark plug is designed for compact marine outboards where space and electronic interference are major concerns. With a short reach, resistor core, and small 10 mm thread, it offers precise ignition, smooth engine operation, and effective EMI suppression. Its construction ensures optimal heat transfer and corrosion resistance in harsh marine environments.
Key Features:
- Resistor-type design for reduced electromagnetic interference
- Short 12.7 mm reach and compact M10 thread for small engine heads
- Nickel alloy electrodes resist marine corrosion
- Factory-set gap (0.7–0.8 mm) ensures stable ignition
- Ideal for lightweight 2- and 4-stroke outboards
Technical Specifications:
| Attribute | Value |
|---|---|
| Model | NGK CR6HS |
| Osculati Code | 47.558.40 |
| Thread Diameter | M10 × 1.0 mm |
| Reach | 12.7 mm |
| Hex Size | 16 mm |
| Heat Range | 6 |
| Gap | 0.7 – 0.8 mm |
| Electrode Type | Standard |
| Resistor | Yes |
Manufacturer Compatibility:
- Yamaha
- Mercury
- Mariner
- Suzuki
- Tohatsu
- Selva
- Honda
Cross Reference:
| Brand | Model |
|---|---|
| NGK | CR6HS |
| Champion | Z9Y |
The NGK CR6HS is a trusted choice for compact marine engines requiring excellent ignition stability in a tight installation space. Its resistor construction makes it ideal for use with modern electronics and ignition systems found in small 2- and 4-stroke outboards.
