Might want to check the water in the gas.
Pour a quart of the gas into a clear Mason jar and see what floats to the bottom.
There are new warnings at the local gas stations saying that the Non-Ethanol gas now has some Ethanol in it.
Ethanol draws moisture right out of the air, especially in a humid climate.
Could try an alternate fuel source of known new good fuel.
Onboard fuel pump diaphragm going bad not pumping required amount of fuel. Some of those fuel pumps are Vacuum driven and are prone to clogging.
Good Luck
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