So at taxi speed is the carb. only feeding fuel through the slow run idle jets. Seems if carbs. aren't set right there seems a stutter at 1200-1300 rpm. Is this the change over point.
So what's the point leaning carb. engines when taxying.
Never had any problems properly set up carb. ign. and plugs.
But do believe plugs should be pulled at 25, not pushed to 50 hour check as we do.