Hello dave & every one, all good advice on that tractor mower engine. If
the Engine is 2 cycle (oil added to gasoline), problem could be a
crached cylinde head or gasket. If it's a 4 cycle eng. (gas %oil
seperate), problem could be timeing chain, gear, any way there's a lose
of compression, thus no start. Gas out of carb. & exhaust, valve timing
off. Mike D