My riding mower is a Murray with a rear engine (roughly 1997/1998 based on what I could find online) hand me down with a 12hp Briggs and Stratton engine. It suddenly won't start. It has an electric starter which operates fine but the engine won't turn over. I noticed this week it had a flat and I needed to cut the grass this weekend so I started it Friday and moved it to the patio so I could remove the tire. I had no issues starting it. Saturday I got a new tire and installed it. I fueled up after mounting the new tire and went to start it and the engine wouldn't turn over. My first thought was that the gas must have gone bad although it's only 2 to 3 weeks old. I removed the air filter and sprayed the air intake thinking if it has bad gas, it should at least turn over and run for a few seconds until the carb cleaner burns off. The engine still wouldn't turn over so I replaced the plug. Still nothing. I plan to test for spark later when it's not so bright out but I can't imagine it having spark one day and not the next unless the plug went bad.
Am I correct in thinking that if I filled it with bad gas, spraying carb cleaner into the air intake should at least allow the engine to turn over briefly until it burns off?