Paul, cleaning a Tecumseh carburetor is fraught with difficulties. Please look at these instruction pages first:
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Remember, you have a Series 7 carburetor, which is a slightly odd one. The objective is to clean your carburetor, in particular the main jet and the "main nozzle emulsion" (that is, the emulsifier). Don't dismantle more than necessary, and don't adjust anything without discussing it first. Tecumseh's quaint approach to carburetion is probably the main cause of their engines being scrapped as unfixable.

We had a fairly long thread recently on an OHV Tecumseh carburetor:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=55609&page=2
The main problem in that case was that the emulsifier was pressed in and could not be removed. However your Series 7 has a removable emulsifier. Let's go at this carefully, though.

Joe, this is one of the large engines, specifically an OHV13 with a Series 7 carburetor. It has an O ring on the bottom of the emulsifier, and another one on the end of the main jet.