Show me your spark plug color

[pbillyi69]

My 6401 after a WOT plug chop. That was tuned to 13,000. It didn’t readily 4 stroke much out of the cut so I fattened it up. But according to plug at 13,000 it seemed for sure to lean. Or am I wrong?

I have been using a tach to verify my ear isn’t hearing the limiter. The 6401 seems happiest at 12,500-12,700 where it makes good power and 4 strokes instantly out of the cut even though the limiter is 13,500.

Sure ran real good at 13,000 though.

that plug looks just about right to me

 

[pbillyi69]

with all the different stuff in the oil unless you do a plug chop on a fully warmed up saw in the middle of a long cut, the plug wont be show an acurate reading and even then it is going to be slightly tainted because it will spin a fair amount of revolutions after you kill it running fresh mix through it. just my thoughts. hershey bar brown for plugs on gas alone is how i was taught. once you put other stuff in the fuel things change. oh yeah there was still lead in the gas when i was taught too.

 

[Oddsandends]

Let's resurrect this thread.

My 009LEQ: