Briggs and Stratton 20HP V Twin Model 40 Carburetor Clean and Startup - YouTube
Amazon.com: DUCTAIL 791230 Carburetor, Compatible with Briggs and Stratton 407777 20 - 25 HP V-Twin Engine, 699709 499804 Carburetor Kit for John Deere MIA10632 LA150 LA145 LA130 L120 with Lawn Mower Air