NGK TR6IX IRIDIUM SPARK PLUG

Function and technical context

Iridium spark plugs act in the ignition system of the marine petrol engine, generating the electrical spark that initiates combustion in each piston cycle. The 0.6 mm fine wire central electrode concentrates the discharge energy at a precise point, resulting in a cleaner and more complete ignition of the air-fuel mixture. The ground electrode with conical cut improves the propagation of the flame front and reduces power losses due to incomplete combustion, something critical in outboard and stationary engines that operate under variable loads and high humidity conditions typical of the marine environment. A poor ignition of a spark plug manifests itself as jerks in acceleration, increased fuel consumption and difficulty maintaining idle speed, problems that on the high seas can lead to risky situations. With a 14 mm × 1.25 mm thread, conical seat, 18 mm reach and gap calibrated to 1.0 mm in accordance with ISO standards, this reference integrates directly into standard specification internal combustion engines without the need for adaptations.

When to replace this spark plug?

The most common symptoms of a worn spark plug in marine engines include difficult cold starting, intermittent misfire under full load, irregular engine vibrations and a noticeable increase in petrol consumption. Iridium extends the useful life of the electrode significantly compared to conventional nickel references, with an estimated longevity between 40,000 and 50,000 kilometers of equivalent operation; However, in marine engines it is recommended to inspect the spark plugs during each seasonal maintenance and replace them preventively every two seasons of intensive use. Changing the spark plugs before they show visible signs of erosion on the electrode prevents unexpected breakdowns while cruising and protects the ignition coil from overloads resulting from a poor spark.

Compatibility

Equivalent manufacturer part numbers