Safety switches. If you are not sitting in the seat while the engine is running, and you disengage the brake, it will die. If you are not sitting in the seat and attempt to engage the mower, it will die. If you are sitting in the seat and attempt these things and it dies, there is a problem with the safety switch beneath the seat.
Harry
July 2011
I can answer this question...
fix a Murray Enduro 17.5 over head cam tecumseh engine?