Folks - long time lurker, first time poster. I have an Ariens mini zoom 1540 with a Kohler Courage 15HP motor. For some reason, it won't start and I'm looking for suggestions. The mower is two years old. It has spark (verified by pulling the plug, laying on the engine case, and cranking), has fuel (the section of the air filter covering the throttle plate is wet with fuel after cranking), and I assume compression is ok because it doesn't crank any differently than it has in the past. It started fine before I sharpened the blades, changed the air filter, and changed the oil/filter this afternoon. I changed the oil with 10w30. Looking for suggestions here to start troubleshooting. I'm terrible at working on carb'd motors. Thanks in advance, folks.