NGK 5887 IZFR5G Laser Iridium Spark Plug
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Precision spark plug for smooth combustion
The NGK 5887 IZFR5G Laser Iridium Spark Plug delivers durable ignition for smooth combustion and stable engine performance. Featuring a laser-welded iridium centre electrode and platinum-tipped ground electrode, this resistor-type plug is designed for select DFI (Direct Fuel Injection) and Optimax 2-stroke engines. Used almost exclusively in Mercury and Mariner outboard motors.
NGK 5887 IZFR5G Laser Iridium Spark Plug Features:
- Built to NGK standards for long life and consistent performance
- High-quality OEM replacement
- Trivalent metal plating for strong anti-corrosion and anti-seizing protection
- 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
- Designed for select DFI (Direct Fuel Injection) and Optimax 2-stroke engines
- Used almost exclusively in Mercury and Mariner outboard motors
NGK 5887 IZFR5G Laser Iridium Spark Plug Specifications:
Shell:
- Model Number: IZFR5G
- Part Number: 5887
- 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: 0.8 mm (0.031")
Centre Electrode:
- Material: Iridium
- Type: Fine Wire
- Size: 0.6 mm
- Design: Extended Projection
Ground Electrode:
- Material: Platinum
- Type: Standard
- Shape: Taper Cut
- Quantity: 1
Electrical Performance:
- Resistor: Yes (5k Ohm)
- Heat Range: 5
Installation:
- Torque (Aluminium): 25-30 Nm (18-21.6 lb-ft)
- Torque (Cast iron): 25-34 Nm (18-25.3 lb-ft)
Compatible Mercury / Mariner Outboards:
- 135 HP, 150 HP, 175 HP (2.5L V6 OptiMax / DFI engines)
- 200 HP, 225 HP, 250 HP (3.0L V6 OptiMax / DFI engines)
Note: This spark plug does not suit XS models or standard 4-stroke engines.
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