I'm retired and live in Murfreesboro, TN, about 30 miles southeast of Nashville. I'm interested in learning more about 2 and 4 cycle engines. Homeowner with about 3/4ths of an acre. My current mowers are a 21" Cub Cadet S621 (quit starting about a week ago) and a John Deere GX85 rear engine riding mower. Both are about 12-15 years old and I may be in the market next year. Hope to learn alot.