2000 Yamaha 100hp 4-stroke w/Grady 180

Any thoughts on the pairing of a 1999 Grady White 18' Center console (hull weight w/o engine is 1800lbs) with a 2000 Yamaha hp 4-stroke 100hp carburated model? Sounds a bit underpowerd to me especially with 3 or 4 people in the boat. Also any thoughts on where I could find archived performance data for this engine when paired with a Grady 180? Thanks for any input members can provide.

[boats.net]

Yamaha's web site list the 180 Sportsman with Z150 under the archive bulletins but not twin F100's, Performance Bulletin Home