mrc 963 #1 Posted June 1, 2014 hi men, trying to help a friend with this one. tractor was starting and running fine with pto engaged running a mower deck. tractor starts and runs with seat switch connected or not connected. that in itself seems odd to me. suddenly with rider on seat when pto is engaged engine stalls. is this a seat switch or pto switch problem? the seat switch has a 3 prong connecter. how do i jump that? thank you mike in mass. Share this post Link to post Share on other sites