Bertsmobile1:
You might want to go pee before you start reading this info.
Just some general info about the NLA Walbro LMT carb replacements.
Here is a direct link to show the WALBRO carb that was used on that engine which shows a list of the carb part numbers and the models of the Briggs engines and your engine model is included in the list.
outdoorpowerinfo.com
outdoorpowerinfo.com
What is little bit confusing when trying to find a LMT carb now days is you cannot use the Briggs part number that was listed for the Walbro because it will take you to a Nikki replacement carb because the Walbro is NLA as a new replacement as you have also determined.
To find a Walbro LMT you will most likely have to watch fleece bay or visit some small engine repair shops and salvages to look for the LMT stamped Walbro and even then finding ONE that can be re-built is a roll of the dice due to someone already ruined the emulsion tube or the emulsion tube is corroded and cannot be removed. (as startech indicated)
The reason I have some Walbro LMT's plus several others is I would acquire them from small engine shops that replaces carbs instead of re-building them as non-working carbs, most were just given to me for parts others I would buy in bulk dirt cheap as non-working parts carbs, buckets full and I could take parts and pieces and make useable ones as a winter project. I usually only re-built the more desirable NLA types or the expensive type OEM replacement carbs. (Some OEM small engine new replacement carbs would be in the $300 area and that is why now days most people try to use clones instead of installing a $300 carb on a worn out end of life machine that might be headed for the salvage yard in few days trying to not throw good money at bad.
Look for the LMT stamp and MOST GENERALLY the main nozzle size will be ok for use on a single cylinder Briggs engines if the engine DOES NOT require MAX hp when being used. If you do not see the LMT, its not a Walbro. (even if they say it is)
Here is a picture of a Walbro LMT stamped carb on fleece bay.
The tractor pictured is the one this part was removed from. It may fit other models as well. It was removed from a good running engine.
www.ebay.com