Original Carter #20 carburetor
 

i have a 61 cub cadet original with a carter #20 carb. on the float bowl their is a hole for the bolt and a hole with a button type plug and a disc that mounts inside the bowl. does any one know what that is for? i think it is a bowl drain,

You are exactly right, it is a drain for the bowl to run it dry when storing. :beerchug:

Maybe a tickler to prime the bowl if it's been sitting awhile. Chris

No it's not a 'Tickler" it's a bowl drain, many older engines have that.
A "tickler" would have to push down on the float
so as to "flood" the carb to make easier starting if there was no choke.
or a partial choke, but good thinking.
The old british mo'sikkls used Amal's with a tickler as well as the Dellorto's
---OMG,I'm showing my age

I remember those days with the Bultaco 250 Alpina MC I had. :biggrin2:

Ya,
they were fast (Pursang) IF you could keep them together.
Boy those were the days, had a whopping 3" of travel in the rear shocks,
and everybody ran Ceriani in the front with maybe 4"
Don't know how we survived, Ha,LOL!