John Deere 724D Snowblower Tecumseh 8hp Self-propelled reverse gearsJohn Deere 724D Snowblower. Tecumseh 8hp Engine, pull-start (starts on first pull). Self-propelled forward and reverse gears! Goes through thick, deep or wet snow with ease! (full tune-up in 12/2012 – see last pic). The item “John Deere 724D Snowblower Tecumseh 8hp Self-propelled reverse gears” is.