X340 stalls when brake/clutch released

Hello. New Guy here. We have an X340 that is in very good shape. It's been sitting for a while. This morning it started up pretty quickly but died as soon as I released the clutch/brake pedal. I let it warm up for quite a while but it kept stalling. (This is with me sitting in the seat.) I reached underneath and manually pushed in the clutch/Brake plunger switch. The tractor started fine but as soon as I released that switch, it died.



Seems to me that the switch must be bad. Can it be that easy? Is there something else I should look for?



Thanks!