Models
(997S-2709S) - TO-30 Tractor
(2223S-2402S - TO-35 Tractor
A-HO-60 Stationary Power Plant
Carburetor numbers: 997S, 2223S, 2402S, 2709S
Purchase rebuild kit here, K4429
Flange Size: 1"
Throttle Bore: 997S-2709S: 1 1/16" / 2223S-2402S 1 3/16"
Main Venturi: 997S-2709S: 23/32" / 2223S-2402S 13/16"
Float Setting: 997S, 2709S - 17/64", 2223S, 2402S 11/64"
With throttle body inverted and gasket removed, there should be (the clearance indicated above) between machined surface of throttle body and seam of float. Measure both sides and make them the same.
Set throttle lever adjusting screw until motor runs approximately 400 RPM. Then set idle adjustment screw for highest steady vacuum gauge reading or smoothest engine operation. Correct setting will be found between 1/4 to 1 1/2 turns open.
With hand throttle wide open and engine operating 2000 RPM (governed speed), adjust high speed adjusting needle until smoothest engine operation is obtained. This setting will be found between 3/4 to 1 1/2 turns open.