Playin with idle jets, for the infamous idle SPUTT

These M/S carbs with the air idle jet seem to allways tend to have plenty of idle air mix available since they all seem to idle best with the idle needle almost all the way in (less air in mix). The needle does not seat in the idle jet(orifice)but in the air passage.

Since I am a venerate PACK RAT I have several "old" idle jets from past carb rebuilds.

I am experimenting with numbered drills & opening old idle jets to see if I can get the poppin' "sputter" to minimize. On my 8N it can get better with a slight choking, but I know my passages are clear cause I ran guitar strings thru all of them after soaking & compressed air does go thru them very well.

Since this is something that can be tryed and put back correct, it seems like a 'fun" thing to play with. Their certainally is lot's of air mixture available on my tractors!!!

Anybody else try this/think it is worth trying or will I just hear how stupid it is???

Just wanted to tinker a bit & see if I could clear up the 400 rpm area a bit. It really matters very little in the scheme of utilization, just a picker of nits & can always spend hours doing something of little value while my work is being put off.