I was looking to buy a mower with a 25hp Kohler Command (horiz. crankshaft) with just at 1300hrs on it. It cranks perfect and quick with a little choke, immediately turn off choke she idles perfect and smooth. Stab the throttle, sounds great and still perfectly smooth. Not a hint of smoke at any speed ever. BUT, remove the oil dipstick while it's running and a mist of oil is coming out, same thing if you remove the oil fill cap at the valve cover - is this normal on these engines? I always thought this meant bad rings and, thus excessive blowby but this engine seems perfect otherwise. Try your Kohler, does it do the same thing? I have no idea if this mower actually uses oil, I didn't get to mow with it yet, just ran it sitting for 15-20 minutes. What should I think about this?