NGK 6993 BKR6EKU Multi-Ground Spark Plug
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Precision spark plug for smooth combustion
The NGK 6993 BKR6EKU Multi-Ground Spark Plug is a multi-ground resistor-type spark plug specifically engineered for high-pressure direct injection (HPDI) marine applications. It features a dual-ground semi-surface discharge design to provide reliable ignition and consistent performance under the extreme combustion pressures found in 2-stroke outboard engines.
NGK 6993 BKR6EKU Multi-Ground Spark Plug Features:
- Built to NGK standards for long life and consistent performance
- High-quality OEM replacement
- Dual-ground semi-surface electrode design
- Corrugated ribs help prevent flashover
- Pure alumina silicate ceramic insulator for strength and efficient heat transfer
- Copper core aids heat dissipation
- Triple seals help prevent gas leakage
NGK 6993 BKR6EKU Multi-Ground Spark Plug Specifications:
Shell:
- Model Number: BKR6EKU
- Part Number: 6993
- Thread Diameter: 14 mm
- Thread Pitch: 1.25 mm
- Seat Type: Gasket
- Reach: 19 mm (3/4")
- Hex Size: 16 mm (5/8")
- Terminal Type: Solid
- Overall Height: ISO
- Gap: 0.6mm (0.024")
Centre Electrode:
- Material: Nickel
- Type: Standard
- Size: 2.5 mm
- Design: Projected
Ground Electrode:
- Material: Nickel
- Type: Semi-Surface Discharge
- Quantity: 2
Electrical Performance:
- Resistor: Yes (5K Ohm)
- Heat Range: 6
- Feature: Intermittent Gap
Installation:
- Torque (Aluminium): 25-29 Nm (18-21.6 lb-ft)
- Torque (Cast iron): 25-34 Nm (18-25.3 lb-ft)
Compatible Yamaha Outboards:
- HPDI Series: Used extensively across 150HP, 175HP, 200HP, 225HP, 250HP, and 300HP Yamaha HPDI (2-stroke) models
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