SHAFT SIZE: (D x L). Electric Starter with 15 Amp Alternator. Riding Mower, Zero turn Replacement Engine. Works for various Riding Lawn Mowers that use the Troy-Bilt Husqvarna and Cub Cadet brand engines with the 1″ X 3-5/32″ Shaft. NOTE: (As Pictured) The Dip Stick Tube And Dipsick Is Missing. Small Engines For Less!