Share 'Single Yamaha T9.9 powerful enough for Tangaroa?'

 Would a single Yamaha T9.9 High Thrust be big enough for a Tangaroa fully laden?  Not for maneuvering in tight places where two engines would be helpful for tight turns and such, but for general pushing the boat along.  The Yamaha T25 High Thrust weighs almost twice as much (T9.9 110lbs vs  T25 201lbs) as the T9.9. The weight isn't so much about the boat carrying the extra 90lbs or so, but for m…