TR3 plugs

[Stuart Bollen <stuartb@voicenet.com>]

For whatever reason, my TR3 is constantly fouling plugs. The electrodes are
a light brown, but soot builds up inside the plug until it quits at low RPM.
I'm wanting to try a colder plug, any suggestions? Currently using L87YC
Champions, and yes, I tried NGK and the same thing happens. The engine is
not burning oil, but I suspect it does not have a stock cam,as it has never
idled well or accelerated without stumbling when taking off, but runs well
at high RPM>