craftman riding lawn mower and the new belt drive keeps slipping off

[acer]

I have a craftsman lawn tractor model number: 917.272350 replace the belt drive and it keeps slipping off help.:confused2:

 

[reynoldston]

One of my first questions is when a belt keeps coming off is, do you have the right belt?

 

[wjjones]

I have a craftsman lawn tractor model number: 917.272350 replace the belt drive and it keeps slipping off help.:confused2:

Welcome to the Forum!..acer.. Are all the belt keepers in place?