<<  I use the racing plugs NGKR6725-115. Find a cold or similar plug on a heat
 > range chart. Run as cold a plug as will remain clean in your engine.
 >
 > These are retracted gap. Very cold heat range, wire electrode. I use the
same
 > plug all year.
 >
 > Many dirt bikes have to run very cold plugs, and those cost far less than
the
 > nucs at $25.00 each.
 >
 > Lynn E. Hanover
 >
 > Loss of electrode material would suggest too hot a heat range.

I should have added that I have no aircraft application. This is information
developed from years of racing the rotary. A hotter plug may run longer
without fouling should you be forced to use aircraft fuel.

Lynn E. Hanover

 
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