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The engine fuel filter is not fed by gravity it is fed via vaccum operated fuel pump. If it has fuel in the tank there should be no reason it is not getting it to the fuel pump, especially when its a new cart. I would call the TSC back and tell them they are incorrect and ask them to make it right....if that doesn't work contact ezgo. I would be pissed off if I just bought a new cart and it wouldn't run when I got it home.
You might be able to save all that trouble....look around for cracked, broken or lines that are off.
Here is the service parts manual for the Gas Powered ST Sport II. You can get an idea of how the lines are ran. Page 86 shows the fuel lines and pump.
http://www.ransomes-jacobsen.biz/spe...uals/604710.pd
And here is the Owners manual and service guide for the Gas Powered ST Sport II.
http://www.ransomes-jacobsen.biz/spe.../604709-gb.pdf
Also, they won't have that engine listed on their site. There are also a few members here who have the ST Sport II.