Onan microlite 2800 Gas Carburetors

I serviced small engines for a decade. This is the most effective way to clean a carburetor: Remove carb from engine (make note of connecting throttle and governor rods/springs). Place rags on clean work surface and disassemble carb, including fuel adjustment jets and any plastic. Place parts in a line on work surface in order removed. Sometimes, the adjustment jets can be run in all the way to calibrate for assembly, later (be careful, don't bend anything). Place all the metal parts, including the carb body, in the basket of the carb cleaner container. Lower the basket into the cleaner and let soak. A few hours is usually good. Overnight, all residue is softened. Clean parts with solvent or gas. Blow dry. Reassemble.

I am still using my original gallon container of Berryman's carb cleaner, purchased 15 yrs ago. I have cleaned over 100 carbs with this cleaner.

Good luck!