Hello. I ordered a new carburetor for my mower, as it's been running only at full choke, and for only a short while recently. This has happened before, and replacing the carb has fixed it. So, I ordered another one. I started draining the gas line so I could start swapping out the carb. The carb came in a kit with a spark plug and air filter and fuel filter. I swapped out the spark plug while the gas was draining, because I knew it had been a while since I replaced it, so I figured it couldn't hurt to throw a new one in since it came with the kit. I noticed a rat's nest under the motor shroud, and figured I'd remove that first and see if that was the problem. Anyway, I tried to start it up after I replaced the spark plug and reconnected the gas line and added gas. When I tried, there was nothing. Not even a click. The battery was replaced last year, but I threw it on a trickle charger anyway. It showed full charge, but still nothing. Did I ruin it by replacing the spark plug? I didn't tighten it hard. I pulled the boot off and tried tightening it looser, and then again tightening it tighter than I originally had. Neither worked. I tried putting the old one back in and that didn't work either. Would a bad or broken spark plug make the mower not click at all? Could there be a different issue? Thanks for any help!