Model number 13BH670F062 serial number 1D240B40228 This lawn tractor has been setting for aprox.2 years in the weather. It started right up with a battery recharge and fresh gas. I replaced the mower belt with the correct number belt now when the tractor starts the mower deck (blades) are moving. When I adjust the deck height the motor back fires and shuts off. What did I do wrong or what do I have to replace ? Thank you for any help.

If the blades are moving when you start the tractor something is wrong with your belt routing to your clutch. Do you have a belt diagram or is there one on the deck?