older tiller

I have an older model Briggs & Stratton motor 137202 type 1116 E1. How do I remove the gas tank it's one that has the carburetor mounted on top

Remove the two screws securing the carb to the block, they are a bit finicky to get at, and the screw under the tank. Separate the assembly and now split the tank and carb. You may have to remove the engine to access the bottom bolt.