Rockne33DLXRoadster Posted March 26, 2017 Share Posted March 26, 2017 Gentlemen, which spark plugs i have to use for a 33 Rockne 10 ? Thank you Joe Link to comment Share on other sites More sharing options...
Spinneyhill Posted March 26, 2017 Share Posted March 26, 2017 (edited) The original was a metric thread Champion heat range or model 7. This corresponds to NGK 7, Pulstar 1, Denso 2, Bosch 5. Here is one: http://www.ebay.com/itm/VINTAGE-NOS-Champion-7-Spark-Plug-18-mm-1-Hex-Box-Paper-/292057192391?hash=item43fff717c7:g:h2YAAOSwuLZYygUj So you want an 18 mm plug with heat range 7 is my guess. Here you go: http://www.sparkplug-crossreference.com/convert/CHAMP_PN/7 Edited March 26, 2017 by Spinneyhill (see edit history) Link to comment Share on other sites More sharing options...
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