I have not used my Mantis Tiller for 3 years. I did take the fuel out of it before storing it though.?

I would use a carb cleaner, with you gas when you fill it. Also, use a higher octane, the first time, and check the hoses for any cracks. Change oil filter, and add oil. Should fire right up.

All of the above. One said hit it with a hammer. Actually this is good advice. A sharp rap many time frees up stuck parts.

I would add fuel and hit it with a hammer.

If you ran the carb completely out of fuel the last time you used it, just add new fuel. If you emptied the tank, but not the carb, it,ll probably need to be removed and cleaned. I would go ahead and put in new fuel and give it a try. Watch for leaks. You may need to replace old fuel lines if you have any leaks.