Ok, I know that this isn’t a car, but it operates like one and this is the best place I know to get an answer. I have a Craftsman riding lawnmower with a 26HP Kohler Pro “Courage” engine. When I go to start it, I get a very nasty griding sound from the engine or a few seconds while it attempts to turn over then it dies to nothing. The battery is good, I changed the spark plug (unrealted possibly, but it needed to be changed), and I beleive the air filter is fine. So any ideas what I should be looking to fix? Thanks!