One good carb, one bad carb ?

I like billinstuart's recommendation at this point.

Since the carb is obviously not put together right, and one seems to be working, you can put them both on the work bench again and take them both apart carefully. LOOK carefully at that good carb and keep it on a seperate bench. Be sure you have not forced any of those little rubber tipped parts, etc.

If you put the bad carb back together, including that float adjustment, just like the good one, it should work like the good one unless you've sprung something, or unless there's someting mechanically wrong with the carb.

I would also observe the other carb at the same rpm as the offending carb. If they're both looking the same, ie, squirting fuel in the same manner or not, then that can tell you something. If both engines are running and fuel consumption is the only issue, swapping the carb is also an alternative, as Bill suggested.

Carbs fall under the "perversity of inanimate objects" theory. Either they're right, or they're not right, anything in between is less than right. I've heard of the butterfly shafts hogging out over time, admitting air and causing drivability problems, but this is not your problem from what you've described.

It is possible that your carb kit has the wrong parts for your particular carb. Stranger things have happened, a lot stranger!

Good luck, all the best.

regards,

Paul