7 Minutes for mucking only, does not include hay and water.
The deeper/messier the horse, the longer it takes, those are about 10 minutes. I have one that’s gutted daily because he’s so nasty, he’s about 3 minutes.
I have a 3 stall barn, from morning feed, to all chores (water, hay, mucking, dumping wheel barrow, blanketing, turning out) it takes me about an hour… if I’m feeling lazy it takes me an hour and a half. Usually includes scrubbing outdoor waters when it takes 1.5 hours.
During the week my dad comes out and mucks one stall, were done the barn in about 20-30 minutes.