John Deere D110 clicks and won't start engine
My John Deere D110 clicks once when I turn the key to start it and does not start the engine (no engine starting sound at all).
I did maintenance prior to getting this issue: changed oil, air filter, fuel filter, spark plug and the blades. After the maintenance, I could start the engine. When I started cutting the grass, there was a loud sound and a little bit of smoke. I could not start the engine afterwards.
I thought I put too much oil and that's what caused the smoke, so I drained it a bit. I also added fresh gas. I have tried several things already: changed the battery, the starter solenoid and the starter motor. Double checked the spark plug, and looked at the fuse. Somehow I feel that starter motor does not get engaged, but I am not sure why.
What else might be causing my issue? I also checked the safety switches and nothing seems to be loose. Would they disable starter motor?