Engine Type In-Line Four Cylinder Displacement 97 ci (1596 cc) Bore x Stroke 79 x 81.4mm (3.11 x 3.20in) Prop Shaft Horsepower 90hp @ 5500rpm Compression Ratio 9.6:1 Fuel Induction EFI/SOHC/4 Valves Per Cylinder Exhaust Through Propeller Intake Single Throttle Valve Ignition TCI Micro Computer Spark Plug LFR5A-11-00-000 Alternator Output 25AMP Starting System Electric w/PTT Lubrication Wet Sump Engine Oil Capacity 3.7L/3.5L w/without filter Full Throttle RPM Range 5000 ~ 6000 rpm Cooling Water/Thermostatic Control Recommended Engine Oil Yamalube® 4M (See owner's manual) Recommended Fuel Regular Unleaded (Minimum Pump Octane 87) Recommended Fuel Filtration Yamaha Mini 10-Micron Fuel/Water Separating Filter (external) Ethanol Blend Limit 10% Maximum Gear Ratio (25:11) 2.27:1 Gear Shift F-N-R Shaft Length L = 20" X = 25" Degree of Tilt 70° Degree of Trim -4° through +16° C.A.R.B. Rating 3-Star Dry Weight 25" shaft / 169 kg (372 lbs) ; 20" shaft / 166 kg (366 lbs) Steering Angle (maximum) 35° from center, either direction Warranty 3 Year Limited Pleasure Boat - 1 Year Limited Commercial Comparison Image