I have been working on my 720 LP gas trying to get her to run like I know she should... Finally found a problem in the regulator that was causing a leak by the low pressure valve. I got that fixed and had her running like a champ. Later before dark I went to put her in the shed for the night and when I started it... it was missing and popping... It was just dark enough that I noticed a stray spark every now and then from the plug wire boot to the frame of the tractor!!!! It was jumping right through the boot!!!! I had just bought those wires a couple weeks ago at Tractor Supply as a universal set... Next day I went and bought a new set of 7mm wires from the auto parts store. (ended up buying a set for an older 350 chevy to get what I needed) and put them on... now, she runs perfect and starts great.... Lesson learned.. Just had to share.