My 120 Indy will only start for a few seconds and then stall, it has a fuel delivery problem.
I'll re-clean the carb, but the little fella saw me do some work on it this fall, and he thought he'd do the same... My air screw wasn't in the pan, but I did find it about three turns out - what should it be?
(my money say 1-1/2 turns out).

I would start with 1 1/4 to 1 1/2 might take a little more or a little less but its a start.

here's spec sheet, 1-1/2.

Thanks guys - I removed the air screw, blew in some clean gas through the hole with a syringe, tested the fuel flow from the gas line and blew some gas into the fuel intake on the carb the same way.

re-installed the jet, choked it and it started straight away.

jeeze, those carbs are fussy