Yamaha Midrange F50 Four Stroke

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Engine TypeIn-Line Four-Cylinder
Displacement60.8 ci (996 cc)
Bore x Stroke65 x 75mm (2.56 x 2.95 in.)
Prop Shaft Horsepower50hp @ 5500rpm
Compression Ratio9.5:1
Fuel InductionEFI (SOCH)
ExhaustThrough Propeller
IntakeSingle Throttle Valve
IgnitionTCI Microcomputer
Spark PlugDPR6EB-9
Alternator Output17 Amp
Starting SystemElectric with Power Trim & Tilt
LubricationWet Sump
Engine Oil Capacity2.1L/1.9L w/without filter
Full Throttle RPM Range5000 ~ 6000 rpm
CoolingWater/Thermostatic Control
Recommended Engine OilYamalube® 4M (See owner's manual)
Recommended FuelRegular Unleaded (Minimum Pump Octane 87)
Recommended Fuel FiltrationYamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit10% Maximum
Gear Ratio(28:12) 2.33:1
Gear ShiftForward, Neutral, Reverse
Shaft LengthL=20
Degree of Tilt69°
Degree of Trim-4° through +20°
C.A.R.B. Rating3-Star
Dry Weight119kg (262 lbs)
Steering Angle (maximum)40° from center, either direction
Warranty3 Year Limited Pleasure Boat - 1 Year Limited Commercial