If you feel that you can adjust valves by how they look and feel, without feeler gauges, tells me it is time to get out of this thread. Adjusting valves to within .001" just can not be done that way. You're lucky that it didn't start, as you could have done serious damage. It would take my students a week of practice on different engines to learn to do it right consistently with feeler gauges. Sorry I can't help you any more, good luck.
After watching videos I just guessed how much the arms moved when the tech did it after adjusting versus how much mine moved after adjusting. That being said, I had ordered feeler gauges, they just hadn't come in yet. I'm going to try and readjust with the gauges today, and hopefully you, or someone else can help after I see what happens there. Being the first mower I have ever worked on, of course I'm going to make rookie mistakes. No need to imply that I'm an idiot. :laughing: