Kerry Posted January 19, 2015 Share Posted January 19, 2015 I purchased some de so iridium power 0.4mm spark plugs from opieoils at the weekend but does anyone know if they need gapping and what should the gapping be so I can check they are correct Quote Link to comment Share on other sites More sharing options...
Jud1 Posted January 19, 2015 Share Posted January 19, 2015 http://densoiridium.com/installationguide.php "In most cases your Iridium Power plugs do not need to be gapped. Even with small variations in the factory set gap the ultra-efficient firing power design will compensate for those small variations" (according to the US guys quoting the Manual, it should be 0.043" or 1.1mm) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 19, 2015 Share Posted January 19, 2015 If they are the correct part number for the engine then they will be gaped correctly. Iridium plugs can be re-gaped but unless you know how I wouldn't advise it. Quote Link to comment Share on other sites More sharing options...
a2orry Posted January 19, 2015 Share Posted January 19, 2015 Are you sure 0.4mm that is a tight gap . Quote Link to comment Share on other sites More sharing options...
Jud1 Posted January 19, 2015 Share Posted January 19, 2015 Are you sure 0.4mm that is a tight gap . should be 0.043" or 1.1mm Quote Link to comment Share on other sites More sharing options...
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