It is keyed and tapped. Reverse crankshaft is 1" long with a 1/2" diameter- it is tapped and the end squared off. The item "TECUMSEH HMSK80-155636V 8 HP/318cc HORIZONTAL SHAFT ENGINE USED" is in sale since Tuesday, March 26, 2019. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Other Outdoor Power Equipment Parts".The seller is "buysellall2012" and is located in Minneapolis, Minnesota. This item can be shipped to United States.