I have not been here for a while, sorry I am late to the party.
I am running a 2008 Honda 90 VTEC on my Bluejacket 271 .I purchased it used from a Honda Marine dealer, with 1000 hours the motor has performed flawlessly so far. My cost for the motor controls and the rigging that I did myself was less than 50% of a new one Observations after two seasons and a couple of hundred hours.
Top Speed @ 6000RPM = 28MPH
Cruising speed 18 - 20 MPH @4000RPM +/-
Fuel economy 3 -4 MPG
Weight of Boat, Motor, full fuel and water = 3600#
The 90 is probably too much, but it is awfully nice to have the extra umph when navigating around the massive bleach bottles that throw up a tidal wave bow and stern when making way.