I would go to another exmark dealer(if thats the brand you like) and trade it for a carbureted model. Take your beating and be rid of the thing and the dealer. On second thought I'd call exmark one more time on the slim chance they might really step up and take care of your problem-FAST. If not I would not ever buy one their machines again. Been there -done that. Exmark how about some help for this man . John Gamba- Wheres your stroke with exmark.