Re: Fuel problem
An odd question. Why do you want to increase the fuel flow. What problems are you having.
The float since you ask about it controls the fuel in the carb to the correct level. Generally the float closes the needle valve when it is horizontal . It is checked by turning the carb upside down but you need to refer to the workshop manual for details and to confirm that "horizontal " is correct.
If you are not getting adequate fuel flow the likely reasons are restricted tank vent, restricted fuel pick up (filter in tank??) air ingress into fuel line esp at connector, choked fuel filter on the fuel pump, a defective fuel pump or blocked or sticking needle valve
Several of those will be overcome by gentle pumping of the bulb.
Are your troubles symptoms of a carb in need of cleaning. That can often be diagnosed by operating the choke or primer. If it runs partially choked it almost ceratinly means the carb needs cleaning.