The NGK IZFR5G is a genuine Iridium resistor spark plug, developed for modern high-performance 2-stroke DFI outboard engines. The fine iridium center electrode requires lower ignition voltage than a traditional spark plug and ensures a powerful, stable spark, quick cold starts, and efficient combustion. The result is high engine performance, lower fuel consumption, and a significantly longer service life.
NGK is the world's leading manufacturer of spark plugs and an original equipment supplier to a wide range of engine manufacturers. The IZFR5G is equipped with a laser-welded iridium center electrode, a copper core, and a built-in 5 kΩ resistor, which reduces electrical noise and protects the engine's ignition and electronic systems. The corrosion-resistant plating makes the spark plug particularly well-suited for the maritime environment.
The spark plug is used on, among others, several Mercury Optimax 115, 135, 150, 175 and 200 HP 6-cylinder DFI outboard engines from the 2003-2006 model years. Always check your engine manual or the existing spark plug before ordering.
Key features
- Genuine NGK Iridium spark plug
- Fine iridium center electrode
- Stable and powerful spark
- Quick cold start
- Built-in resistor (5 kΩ)
- Copper core for optimal heat dissipation
- Long service life
- Corrosion-resistant construction
- OEM quality
- Suitable for Mercury Optimax DFI outboard engines
