SHAFT SIZE: (D x L). 1" X 3-1/2" Tapped with keyway. Tillers, Pressure Washers, Possible replacement for many applications requiring the 1" X 3-1/2" Shaft. If youre not sure if this will fit give us a call and we can help! Includes fuel tank and muffler, Has low oil shutdown, Manual choke, Can be setup for manual or remote throttle.This engine makes a great replacement for the GX390 with the 1 Keyed shaft. The item "CH440-3115 Kohler 14HP Command PRO Recoil Start 1 Shaft Engine Horizontal" is in sale since Wednesday, August 23, 2017. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Engines, Multi-Purpose". The seller is "smallenginesforless" and is located in Albany, Indiana. This item can be shipped to United States.