Home Depot, Home Depot?
Load it back on your enclosed trailer, and bring it back. I've read nothing good about them. BUT if you're determined to keep it, I wish you GOOD LUCK.
Isn't the reason for buying new, to not have to work on them? Check oil, fill the fuel tank, and mow.
Edit; you already used it, so you can't take it back. So GOOD LUCK.