NGK UR6IX IRIDIUM SPARK PLUG

Function and technical context

The UR6IX spark plug is part of the petrol engine ignition system and its function is to generate the electric spark that initiates the combustion of the air-fuel mixture in each cylinder. Thanks to the iridium electrode, this component offers a more precise and stable spark than conventional copper or platinum electrodes, which translates into more complete combustion and more uniform engine response. In marine environments, where humidity, suspended salt and continuous thermal cycles subject the ignition system to especially aggressive conditions, the thermal stability of iridium represents a differential advantage over less resistant materials. Poor ignition causes combustion failures, loss of power, increased fuel consumption and, in serious cases, damage to the catalyst or the engine itself.

When to replace this part?

The most common symptoms of a worn or bad spark plug include difficult or irregular starts, jerks and hesitation during acceleration, noticeably increased fuel consumption, and unstable or vibrating idle. Iridium spark plugs have a considerably longer life than conventional spark plugs, although it is recommended to inspect them during each seasonal maintenance and replace them at the interval indicated by the engine manufacturer or in the event of any of the symptoms described. Replacing spark plugs preventatively before a heavy boating season prevents unexpected downtime on the water and ensures that the ignition system responds reliably from the first start.

Equivalent manufacturer part numbers