I've ran those commercial motors in Honda mowers. They only make 6 ft lbs of torque. Meaning not very stellar at all.
We had to use what I called "the power straps" to cut tall, fast growing springtime grass. Meaning with the blade on, a bungee cord was installed directly on the throttle and the handlebar. No other way to use the mower than run it wide open in thick yards. Needless to say they Commercial Honda mowers were quickly sold. No wonder none of the lawn crews around here do not use Honda mowers.
slomo