Jet numbers are the size of the hole in the jet to allow fuel to mix to the air, basically the bigger the number the more fuel gets mixed into the air.
On a SHA15:15 I have run between 58 and 62 on a stock AV7, depending on the engine and how it is set up.
Right now to get her going right, replace your fuel line with new line. Use clear line so you can see if there is fuel flow or not.
Clean the carb goodly and also check that the air is flowing smoothly out of the fueltap. Just open it and let a little flow into a jar to see if it is flowing goodly.
Dont panic when you see a air bubble in the fuel line as long as it is not the entire line is only air. You can flick the line with a finger first time you open the tap and the air should chase out of the line.