My Mother in Law has a late model Ariens with an Intek 1cylinder 21 HP that will start to run then cut-out right away. It will not act like it is going to start again until an hour or so later. I checked for tractor switches, seat, clutch brake, and PTO. I can not seem to figure out the issue, but I think it is with the engine, not tractor. The starter rolls over but no Kick. I know I need to check for spark, but any other suggestions to look for (Diagnostics) next time I'm there ?