Murray lawn tractor. I have a 10 year old 12.5 hp murray tractor. It is kept in

Question

I have a 10 year old 12.5 hp murray tractor. It is kept in like
newcondition. This is the first problem ever. It has safety sensors in
theseat , clutch pedal and blade engage arm. The problem is that after
Istart the mower and either try to engage the blade or release
theclutch to go - the motor dies. It acts as if you are turning off
thekey. I checked the seat sensor with an ohmmeter and it is fine
andtried a different battery of known good quality and checked the
fuse.All seems okay. I cant seem to figure this one out. Anyone got
anyideas I would really appreciate the help. Thanks in advance , Bill