Osculati 47.558.17 – NGK DR5HS Spark Plug
The Osculati 47.558.17 features the NGK DR5HS spark plug, a resistor-type plug used in small 2-stroke outboards where compact ignition solutions with RFI suppression are required. With its medium-cold heat range, copper-core center electrode, and 1/2″ reach, this spark plug is optimized for consistent cold starts and reliable combustion under high-load marine conditions. It includes a 5 kΩ built-in resistor to protect marine electronics such as GPS, sonar, and VHF radios.
The DR5HS corresponds to Champion P10Y and is commonly used in compact and mid-range outboards by all leading marine engine manufacturers.
Main Features:
- Model: NGK DR5HS
- Thread Size: 14 mm
- Reach: 12.7 mm (1/2″)
- Hex Size: 20.8 mm (13/16″)
- Resistor: Yes – 5 kΩ internal
- Heat Range: 5 (medium-cold)
- Tip Style: Standard
- Core Material: Copper core
- Champion Equivalent: P10Y
Compatible Engine Brands:
- Mariner
- Yamaha
- Mercury
- Tohatsu
- Selva
- Suzuki
- Honda (2-stroke outboards)
Benefits:
- Integrated resistor for interference-free operation with electronics
- Medium-cold heat range supports higher engine loads
- Strong anti-fouling and marine-grade durability
- Direct Champion P10Y replacement for many OEM installations
Technical Specifications Table:
| Parameter | Value |
|---|---|
| Item Code | 47.558.17 |
| Model | NGK DR5HS |
| Thread Size | 14 mm |
| Reach | 12.7 mm (1/2″) |
| Hex Size | 20.8 mm (13/16″) |
| Resistor | Yes (5 kΩ) |
| Heat Range | 5 |
| Core Type | Copper |
| Champion Equivalent | P10Y |
| Application | Small to mid-sized 2-stroke outboard engines |
The Osculati 47.558.17 – NGK DR5HS spark plug is a robust and RFI-safe solution for compact 2-stroke marine engines. Its combination of cold rating, copper core, and projected reliability makes it a trusted choice in demanding saltwater use cases.
