Osculati 47.558.32 – NGK DCPR7E Marine Spark Plug (RA8-H10 Type)
The NGK DCPR7E (Osculati 47.558.32), also referred to as RA8-H10 in several OEM marine catalogs, is a high-performance marine spark plug built for compact outboard engines. Its slim 12 mm thread and 16 mm hex head make it ideal for space-constrained cylinder head designs. The plug includes a resistor to suppress radio interference and features a projected tip for improved ignition efficiency and anti-fouling performance.
Key Features:
- 12 mm thread for compact engine compatibility
- Resistor element reduces electromagnetic interference (EMI)
- Projected insulator design enhances cold start and combustion
- Nickel alloy electrodes resist corrosion in marine use
- OEM fit for modern 4-stroke marine engines
Technical Specifications:
| Attribute | Value |
|---|---|
| Model | NGK DCPR7E |
| Osculati Code | 47.558.32 |
| Thread Diameter | M12 × 1.25 mm |
| Reach | 19 mm |
| Hex Size | 16 mm |
| Heat Range | 7 |
| Gap | 0.9 mm |
| Electrode Type | Standard with projected tip |
| Resistor | Yes |
Manufacturer Compatibility:
- Yamaha
- Mercury
- Mariner
- Suzuki
- Tohatsu
- Selva
- Honda
Cross Reference:
| Brand | Model |
|---|---|
| NGK | DCPR7E |
| OEM Label | RA8-H10 |
| Champion | RA8HC |
NGK DCPR7E spark plugs are trusted by OEMs and marine professionals for their consistent ignition quality and reliability. This model is particularly suited to modern small-displacement 4-stroke outboards where space, precision, and EMI suppression are essential.
