The model number (marked with red box in photo) on a Tecumseh engine can be found on the engine ID label, typically located under the engine cover. Some engines are equipped with a mechanical (flyweight) type governor. . Tecumseh Carburetors Adjustment Dellorto Carburetor These types of carburetors possess a great similarity with the dual system carburetor. Engines with dome style air cleaner start with 3. . This engine contains a float carburettor with choke and bowl drain. Got it started, but only idles very slowly. . . . Visit my channel for more repair videos;.