I've had this tiller for at least 10 years. Bought it from my aunt at her yard sale! It's an old Montgomery Wards tiller and has worked flawlessly until I tried cranking her up the other night for the season. Choking it I couldn't get it to fire or try to start. Removed the air cleaner and used some starting fluid and popped right off but would only run until the fluid was used up. Not getting gas. Sprayed more fluid and held my hand over the air cleaner and as long as I left it there she ran. I could feel the air pulling on the side of my hand so it was vacuuming which I'm assuming pulled gas from the tank. Once I got her going it would only run with the choke pulled halfway out. What might cause this? Just wouldn't run at all with the choke off. Tilled the garden with half choke.