u/Adventurous-Tax2630

So I have a craftsman t110. Bought about three years ago, it worked great the first time used but literally stopped working.
It sat for a while, and when trying to use again it would start and do a small circle area, stop in the middle, and would start again and do another small circle and then quit. This year, it started and did the whole yard once. Did some research and now I have even more questions. Nothings been done to it other than fuel and oil added. It cranks but doesn’t actually start. Now, the issue is that the internet says it could be the battery, selinoid, or fuel filter. Does anyone have experience with this mower and can help me pinpoint what to try first?