Osculati 47.558.75 – NGK BR9ES Marine Spark Plug
The NGK BR9ES (Osculati 47.558.75) is a premium marine-grade spark plug developed for high-performance 2-stroke outboards that operate at high speeds and temperatures. It features a cold heat range (9), long thread reach (19 mm), and a built-in resistor to minimize electromagnetic interference. Its robust design ensures stable ignition and reduced fouling, even under demanding marine conditions.
Key Features:
- Cold heat range (9) for high-revving 2-stroke marine engines
- Long 19 mm reach allows secure fitment in deeper combustion chambers
- Resistor-equipped to suppress RFI/EMI in sensitive marine electronics
- Nickel alloy electrodes for corrosion resistance and durability
- Wide compatibility with performance-focused 2-stroke outboards
Technical Specifications:
| Attribute | Value |
|---|---|
| Model | NGK BR9ES |
| Osculati Code | 47.558.75 |
| Thread Diameter | M14 × 1.25 mm |
| Reach | 19 mm |
| Hex Size | 20.8 mm |
| Heat Range | 9 (cold) |
| Gap | 0.7 mm |
| Electrode Type | Standard |
| Resistor | Yes |
Manufacturer Compatibility:
- Yamaha
- Suzuki
- Mercury
- Tohatsu
- Selva
- Honda
- Mariner
Cross Reference:
| Brand | Model |
|---|---|
| NGK | BR9ES |
| Champion | – |
The NGK BR9ES is ideal for marine service technicians working with aggressive 2-stroke outboards operating under load or at high RPM. Its cold range and robust structure make it resistant to pre-ignition, electrode wear, and saltwater-induced degradation, making it a solid choice for performance and reliability.
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