Replacing Old B&S 5 HP

[wildbill1]

I have an old Sensation commercial 21" trim mower with the old "big block" 5 HP Briggs motor. The motor is about ready to give it up after many years of service. What motor can I replace it with that will have the torque the old motor has?

 

[ILENGINE]

Could you please get us the model information off of the engine, so we can see what you are looking at.