NGK IZFR6N-E SPARK PLUG

Function and technical context

The NGK IZFR6N-E spark plug is the component responsible for generating the electric spark that initiates combustion in the cylinder of the outboard or inboard petrol engine. It belongs to the ignition system and works closely with the coil, distributor or electronic ignition module. Its central electrode made of iridium guarantees a precise and consistent spark, which translates into complete fuel combustion and optimal engine performance. When a spark plug degrades, the air-fuel mixture does not ignite correctly, causing power losses, increased fuel consumption and possible damage to the catalyst or the engine block itself due to incomplete combustion or repeated misfires.

When to replace this part?

The most common symptoms of a damaged spark plug in marine engines are difficult or irregular starting, abnormal vibrations at idle, jerky operation under load and a visible increase in fuel consumption. In frequently used marine engines, it is recommended to check the spark plugs during each seasonal maintenance and replace them every 100 hours of navigation or once a year, whichever comes first, although iridium spark plugs like this reference usually offer a longer life than conventional copper ones. Performing the change preventively before each sailing season avoids unforeseen breakdowns on the water and ensures reliable ignition in any working condition.

Compatibility