I had a 70hp Tohatsu on the back of my old Narwhal 5m rib..... it went like a rocket.
In the year, with about 35hrs of use (from brand new).... I didn't even use a full plastic carton of 2 stroke oil.
The thing started 1st time every time, and the build quality was good too.
From 1000 upto 3500rpm wasn't greatly spectacular, but from 3500 upto 5200rpm (I think that's what the max was), it was like a turbo had kicked in, and if you weren't holding on tight, it would be an over the transom job
If Tohatsu did a 140hp 4-Stroke engine, I would have seriously considered them on my recent rib purchase.