ok you need to give us more infomation but it sounds like your clutch spring has gone so take the engiene out take the clutch bell off and the spring will fall out so you may need a new clutch spring but you need to give us more infomation an the probelm so we can tell you.

how many tanks have you run throught it?
look at your carb operning is the operning 1mm by eny chance?
how mutch fuel spits out of the exaust pipe?

right answer them qustions the best you can please and it will become clear to us.let us know if you dont know what a clutch is or cluch soes or a spring and we will show you how to take you clutch off and check the spring is ok.

A WAY TO TEST IF THE SPRING IS BROKEN..........
if you pull your pull start wile the car's weels are held off the ground.if the weels turning around when pulling the pull start your cluch spring has broken however if your weels do not move a inch thay are ok and it is fine.LOL so thats it really ok

oh and welcome to the redcat forum!!!!enjoy