I posted a few weeks ago that my engine on my Scag ZTR was giving me fits. I had to choke it to start it, then it didn't want to shut off. This was after my neighbor let almost a quart of oil blow out the dipstick tube while mowing. I have found out the problem was that someone had poured a bunch of diesel fuel in both of the tanks on the mower....I am don't keep diesel in a can and my neighbor has nothing that uses diesel fuel....I can't figure out when it could have happened...or why anyone would do that except that they were just an idiot with two much time on their hands. I am just glad that's all it was. Thanks to all of you that responded to my first post about checking the air cleaner as I has not even thought of that. Hope everyone has a good weekend. -Fud