Kohler Command CH18 Engine 18HP T9 Shaft CH620. Hello, Here is a NEW Kohler Command CH18 Engine 18HP T9 Shaft CH620. It has the hydraulic pump adapter shaft with a nine tooth spline shaft... NOT the normal shaft but you can use a stub shaft on the front. The item "Kohler Command CH18 Engine 18HP T9 Shaft CH620" is in sale since Wednesday, March 20, 2019. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Lawn Mowers\Lawn Mower Parts & Accessories". The seller is "ourtoys4you" and is located in La Grande, Oregon. This item can't be shipped, the buyer must pick up the item.