I have a 12.5 horse Briggs & Straton engine on my lawn tractor. It just stopped turning over to start. I checked the battery and it is just fine. I replaced all the sensors and still no juice going to the starter.

It has me stumpted?

Check and varify each of your safety switches, usually three of them seat, blade and clutch. As the switch actuates it should make/break a circuit stopping the engine when no one is seated or the blade was left engaged. If all switches check out then follow the power to the igition switch and from the switch to the solenoid and then the starter. Somewhere in this line I just listed your power is stopping. Come back with your results, there are several people here who can help you.

Did you have any results from ball's suggestions yet?