NGK 7558 ZFR5F V-Power Spark Plug
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Precision spark plug for smooth combustion
The NGK 7558 ZFR5F V-Power Spark Plug delivers reliable ignition for smooth combustion and consistent engine performance. Featuring a V-groove centre electrode, this resistor-type plug is commonly used in select marine outboard engines, particularly Mercury Marine EFI models. It is designed for efficient operation in modern 4-stroke engine applications.
NGK 7558 ZFR5F V-Power Spark Plug Features:
- Built to NGK standards for long life and consistent performance
- High-quality OEM replacement
- V-groove centre electrode design for improved ignitability
- Trivalent metal plating for strong anti-corrosion and anti-seizing protection
- Corrugated ribs help prevent flashover
- High-grade alumina silicate ceramic insulator for strength and heat control
- Copper core aids heat dissipation
- Internal resistor reduces electrical interference
NGK 7558 ZFR5F V-Power Spark Plug Specifications:
Shell:
- Model Number: ZFR5F
- Part Number: 7558
- 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: 0.8mm (0.031")
Centre Electrode:
- Material: Nickel
- Type: V-Cut
- Size: 2.5 mm
- Design: Projected
Ground Electrode:
- Material: Nickel
- Type: Standard
- Quantity: 1
Electrical Performance:
- Resistor: Yes (5K Ohm)
- Heat Range: 5
Installation:
- Torque (Aluminium): 25-29 Nm (18-21.6 lb-ft)
- Torque (Cast iron): 25-34 Nm (18-25.3 lb-ft)
Compatible Outboards:
- Mercury / Mariner: 75 HP, 90 HP, 115 HP, 135 HP, and 150 HP 4-stroke EFI engines (typically 2.1L and 3.0L platforms, serial numbers 2B095049 and above)
- Honda: Select models requiring a 14mm thread, 19mm reach spark plug
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