[Thermodyne]

Lean fuel mix, as in vacuum leak, or dirt in the idle passage. Or a valve timing issue.

Feed it some propane, if that corrects it, then ya got a mix issue.

 

[Thermodyne]

1) If it will rev up, its doubtful that there is a fuel supply issue. Open the bowl drain and see if you get a steady dribble out of the drain hose.

2) the transfer ports are very small, and subject to be blocked by particles of dirt. As opposed to gooped up. You'll need to use high pressure air to clear them. And you need to check the idle mix screw seat. Turning that screw down too tight kills the carb. Also double check the screw for a vacuum leak, some times the packing oring gets damaged and lets the idle circuit suck air.

3) That broken float pedestal was a carb killer in my humble opinion. Float level is critical on those carbs. And now you are basically working off of the assumption that the pivot location is unchanged.

4) Use the propane on it and see what actually needs fixing, as opposed to asking these guys to guess!

 

[Thermodyne]

It sure sounds like a piece of dirt in the transfer circuit. But I guess it could also be a spark issue.

Just for shits and giggles, rev it up and slap your hand over the face of the carb. Don't choke it to death, just let it suck hard then release it. After it clears out repeat, two or three times.

After that have a look at the throttle blade. See how many transfer ports are uncovered at the idle position.

 

[Thermodyne]

Yes... the carb body is now a paper weight...
the pin boss,, is directional.. I think you stsrted or finished from the wrong side and broke it. then you priced the obsolete carb,,, and got sticker shock. 27421-99C,, at nearly $400.. and decided to weld cast zinc..
And here we are...

And I though being blunt was my job

 

[Thermodyne]

Ign senor in the nose cone