My hyper 7 pull start won't recoil. I have replaced the pull start but still the same problem?

i would check the coil spring on the inside of the pull start. check to see if the INSIDE end of the spring is secure to the housing and does not move when the cord is pulled out from the housing. the spring should coil up tighter when the cord is pulled. then check to see and make sure the OUTSIDE end of the spring is secure to housing. if they are both anchored to the housing firmly, the your one-way bearing may the culprit. it is designed to spin freely in one direction on the crankshaft and "grab" the other way.