Ok, following up to myself, before someone else jumps on it...
Ok... so 8.25 lb-ft times 2(pi) means 51.8 ft-lbs of work done each rev., times 3600 rpm = 186480 ft-lbs/min. or ~5.6 hp. That sounds better. Now why didn't B&S just say so to begin with.
(assuming 3600 rpm... doncha just hate it when you have to do that?)