Old 120 hp stalling on idle when hot

[thephoneman]

I tried searching for this topic but no luck. Anyway I have a 1968 Larson with a 120 hp 4 cyl. Starts up real good, idles smooth and runs great. Problem is after a long run wot, it stalls out in neutral (and/or low idle). I have to choke it up to keep it running. I printed off a flow chart of things to check and it lists everything from the idle speed to clogged jets. Any suggestions on where to start (I'm guessing idle speed but don't know what screw that is on there). Its a 2bbl Rochester with an auto choke.
Thanks!

 

[Bondo]

Re: Old 120 hp stalling on idle when hot

Any suggestions on where to start (I'm guessing idle speed but don't know what screw that is on there).

Ayuh,... Welcome Aboard,.... I'd start with rebuildin' the carb,...