I have the exact same motor on my exmark mower 25 hp. Had to replace motor last year cost me 1800 for just the motor with out exaust manifold. 1 1/8 shaft.
That's the same 25HP Kohler that came with my Max IV. It's nice that it has the fan side PTO shaft already installed if you want to add an alternator, I had to source the PTO shaft when I did my alternator and it wasn't easy to find lol
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