Hmmm, I'd have to look and see on the Briggs when you get the model. Regular Kohler CH were good to 25 degrees, I think. . . It is possible the Steiner group spec'd out a different pickup or something. Saw this on a larger model: Maximum angle of operation for the engines in the 450 Tractors: – Kubota D902: 20° continuous, 30° intermittent* – Kubota WG972-GL: 20° continuous, 30° intermittent* – Vanguard Model 61: 20° continuous, 30° intermittent* Your 23 would be like a 38" engine.