Yes I agree with Bert........... There are different size cranks for different applications on engines..... Example, You have a riding mower, so your crank is going to be 3 5/32 inch long.... Briggs, kohlers, kawasakis all have that standard size shaft for riding mowers on vertical shaft engines.....
Pressure washers, common types are vertical shaft also with a 5 or 6 HP engine..... Those shafts or short and not even good to put on a push mower frame..... It won't cut low enough......
Even though you have a Kohler engine you still have a 1 inch X 3 5/32 shaft or real close to 5/32...........
Plus Tard Mon Ami ~!~!