It also may have something to do with the placement of the tiller itself on the outboard. Since the tiller is on the port side of the outboard, if the Capt. sat his (or her) butt on the port side of the boat, the tiller would be close to the Capts. body, & a turn to starboard would be difficult at best. With the Capt. sitting on the starboard side of the boat, the tiller starts out further away from the body of the operator. I guess then the next question would be, why do the different outboard companies put the tiller on the port side of the outboard?
John