Type of carburetor?

i would take it to a local small engine shop and have it sonic bathed after giving it a good soak in hot soapy water to rinse off some of that crud. the model should be cast stamped on the side. a little CLR or the like will help disolve the encrustation short soakings only. white vinegar also works and is cheap. use a old tooth brush to scrub it. note it must be rinsed well and oiled with rp7,wd40 etc to prevent flash corrosion.
do you have a parts book for your machine. if so try the dealer or florin tractor they should be able to supply parts. if your a acmoc member you would have access to the member library. there is a copy of the parts book in the library.
i just found it yes its not real clear to read but it does have the part numbers. and a google search with those numbers might just get you the ensign company numbers and then you might be lucky at a auto parts joint.

Spent a half hour looking for a chart of ensign carbs and the CAT tractors that they fit but I cant find it anywhere. Chad Enyart should be able to help you. He's an ACMOC member
Good Luck

Who is chad and how can I get ahold of him?

[quote="catjoey18 post=237394 userid=2316"]Who is chad and how can I get ahold of him?

Look up a couple posts. Chad Enyart, ACMOC member
 [/quote]

Chad's username is wyocat

Looks like a Cat Thirty carb.

unless you are totally into the original/restore thing, another small carb will work flawlessly....even if it is remotely close to spec..

-carbs are unbelievably forgiving and compensate even if 100 percent not correct for application..just another option etc..