Yamaha Outboards 90HP 4Stroke Motor·  Available in 20” or 25” shafts · Powerful 35-amp alternator · Optional Variable Trolling RPM via the …Prop Shaft Horsepower: 90hp at 5500 rpmRecommended Fuel: Octane 87Alternator Output at W.O.T: 35 ampControls: Remote Mech