Brand new Exmark 19HP KAW only 30 hours. When I try to disingage Parking brake, engine dies. Long story short, I taped down the Parking brake safety switch, then tried again and it worked. However, when I engaged the arms, engined dies again. Bypassed the switches on the arms and the seat, and it worked. However, when I engaged the blade, engine dies. Loaded it on my trailer, hooked all the saftey switches back up Tried it once more while on the trailer and everything worked like a new mower. My problem is that this is the second time this has happened. The first time it happened I took it to the Exmark dealer and he couldn't find anything wrong with it. (of course everthing was working when I took it to him). Could it be a relay? OR What??? Any ideas??