I've got a Mini-Z 19hp Kawasaki/52". The mower has nearly 70 hours. The problem: Mower will cut out occassionaly when hitting bumps. Usually it is several bumps in a row while mowing full out. I know what you're thinking...seat safety switch. Well, I made a jumper cable with spade ends and bypassed the safety switch. Still does it. Sometimes it just cuts out quickly, other times it cuts out to the point of almost stalling out. There's really no rhyme or reason other than the bumps and usually running full speed. I've tried to duplicate it in the same area when it happens and it will not always do it again. It started with about 40 hours and is getting worse. Dealer said it could be several things, including coil on motor. Partner has a Super Z with KAW and it is also doing it. Another guy has a Super Z with KAW and his is doing it as well. I took it to my dealer and he and I run it around the property, and of course it would not do it then. Anyone have any ideas? It is REALLY starting to get on my nerves.