Testing Needle & Seat or Float Valve Updated on 04/22/2021 Was this article helpful? Yes No Related Articles General Troubleshooting Chart Fuel Flow Through a Typical Carburetor Downdraft, Updraft, Sidedraft Governors How a Carburetor Works: Bypass Jet (Full Power Circuit) How a Carburetor Works: High Speed ‘Cruising’ Circuit Need Support?Can't find the answer you're looking for?Contact Support