how to unscrew 2 stroke 60cc walbro SU carburetor (Rotary valve).cleaning and assembly

Particulars Details
HP 3 hp
CC 63.3cc
Weight of the Machine 10.8Kg
Engine Type 2- Stroke,Air cooled
RPM 7500 RPM
Fuel Used Petrol
Fuel Tank Capacity 1300 ml
Oil (Mixing) 40ml (2T) oil per 1 Liter of Petrol
Consumption 650ml/ Hour (Engine)
Recommended Usage To harvest crops like paddy,wheat etc.,and trim crops like Mulbery, Weeds, Grass, Parthenium etc.
Guidance (Before use) Better to give Free/Dry run up to 20 Min for new Machine.
Maintenance Use Grease every 2-3 hrs of run for gear box, Clean the Air filter once in 4 hrs