[miker98038]

You need to hook up the choke, and set the fast idle settings. Read the manual, it’s not complicated but you need to do it all properly. I ran a 1406 with a manual choke on my bird for several years, and it’s a very similar carb.

I suspect something else is wrong. My F code clone had no choke, milled completely off the carb. But even it at 40 would start to idle down before the temp came off the peg. No heat crossover in the intake, but after you got some heat in the heads it only needed a little throttle. The engine had enough cam it idled from 900-1000 warm.