i am helping a co-worker work on his RX73 rear engine rider. His drive belt kept slipping off and i found that the spring on the tension pulley was missing. it was part number M91468 and falls under the VARIATOR, ENGINE JACKSHEAVE, PRIMARY AND SECONDARY IDLERS AND BELTS section in the jd parts catalog online. The problem is i think something else is missing because i cant figure out where the spring goes. If anyone has a rear engine rider and has information on this please let me know. Pictures would be helpful if anyone has any of those too.