A bad heat range spark plug can ruin your whole day and
   lead to loss of power and a broken apex seal. I have formated
   the thread on on this subject and uploaded it to the web site.
   Please read:http://www.rotaryeng.net/ignition.html

   "All about spark plugs for rotary engines."

   Thanks to Joe Hull for discovering this.

   If anybody has anything else to add please upload your
   thoughts.
   --
   Paul Lamar ...No rotor no motor.


Ok,
I've got a '93 13BREW, normally aspirated, with the original rotors-9/1
compression. The spark plugs I have in it are NGKs  the leading splugs
are BUR7EQ(Leading), and BUR9EQ(Trailing). They are brand new, and I
think they are what are recommended as stock in the auto application.
Should I go to BUR9EQ leading and BUR11EQ Trailing?

Anyone?

Thanks

Brian Trubee

I would use them while you are running the engine on the ground.
When you get ready to fly install the colder plugs.
http://www.rotaryeng.net/Spark-plugs/plugcolorchart2.html

Paul Lamar ...No rotor no motor.

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