Ditto what Wally said about an unexpected contact with a hidden unmovable object. I can tell you from experience that there are some areas of Saganaga that are best left unexplored with a motor driven craft. If you do decide to give it a try, shoot for an early start, and then watch the outfitter boats to see where they travel and the routes they take. It will not cover the entire lake since they mainly go to drop off / pick up at entry points, but it’s a good start.  Watch in particular if they make some seemingly bizarre movements; they’re doing that for a reason!

A good example is the narrows before you get into the main part of Saganaga. With average water levels, no traffic, and the right course, there is no problem going wide open with a 25 hp through there.  Stray 10 feet either way and the rocks will have a lower unit for lunch. :-[