Be patient . . . This link takes forever to load.
http://vppneuapps.volvo.com/ww/PIE/V...863&lang=en-US
Or
http://www.volvopenta.com/VOLVOPENTA...n_engines.aspx
Then Click on Operators Manual . . . It has some nice information on the 260 motor and 290 drive.
Apparently there was an "A" and a "B" model. The link above is for 260A.
270 doesn't have the exhaust through the cavitation plate like the 280 and 290. 270/280 also has a shitty trim system (wimpy electric worm gear). 290 will have hydraulic Trim and Tilt.