Cub Cadet back firing problem

[AndyWilliams]

My father has a push type / non ride on mower Cub Cadet. It has electric start. frequently backfires, on the start button and pull cord. Wont start after emptying the bag.
Has been to the dealer several times - still not resolved. Any one had this problem too?

Thanks

 

[ILENGINE]

So we have a Cub Cadet electric start push mower with one of several hundreds engines scattered over several brands and you want us to guess what could be wrong. A model number of the mower and the model numbers from the engine would be a good starting point.