Wow sounds like some glitchy hardware.

The motor will be really sluggesh when you first start it.. It almost wont go anywhere when you throttle it. But read the instructions and do exactly as it says. I had problems breaking in my TRX 2.5 because the piston and sleeve are really right, that it caught at TDC and i had to take it apart to get it down, anyways, If you keep at it, make sure your cool your motor down between tanks you should be ok.