Originally Posted by earlwb
Yes the LSN is inside the throttle arm there in the center.
I'll am not sure how sensitive the carb is to moving that third set screw. It might have changed something I don't know about. Other than what Turk1 stated it does. The setr screw does protrude a few turns out though. I'll see if I can get some close up pics of it tonight when I get home.
I think my carb condemned. Now I can not find the correct setting.
A photo can show the position the third screw. I think.
The engine is in a Piper J3 Cub.