I have a 2002 60" Exmark LazerZ. For some reason, it has an intermitant shutting down problem. It has been in the shop multiple times & each time they can't get it to duplicate the issue, so they can't figure out the source! It is driving me crazy!! It starts & runs fine but if it gets on an incline it dies, then its hard to get it to stay running to get it off the incline to keep mowing. Some days are worse than others, sometimes it just does it becasue it can I guess, it doesn't have to be on an incline. The shop has replaced the tilt switch, fuel filters (all of them) & checked all the safety switches, just can't seem to figure it out. Any suggestions, questions or comments???