If you are referring to gasoline mixed with 2 cycle engine oil; not if its a little bit in a large tank filled with normal gas.
You have a mess.
Bleach, or sugar
Depends on capacity of tank but not much. It is heavier than gas and will go to bottom where pick up is
Sugar sits on the bottom of the tank like sand unless you have some water in the tank also.
there is a Sensor in the tank and if you get bad gas or something it will mess it up and it wont read
drain tank and refill
No problem.
No it does not use mixed gas and oil-it is a 4 stroke which runs just like a automotive engine with pressure lubrication. Gas only goes in the gas tank.
No, they will remain mixed.
How much hydraulic fluid with how much gasoline makes a big difference and was some hydraulic oil mixed into the gas tank or was some gasoline mixed with the hydraulic tank. More info please.
Yes. Very much so.
Safely? Don't mess with it. Replace it. It's too dangerous to weld it.