Yamaha F4SMHA

F4 Specifications

Engine Type One-Cylinder
Displacement 8.5 ci (139 cc)
Bore x Stroke 62 x 46mm (2.44 x 1.81 in)
Prop Shaft Horsepower 4hp at 4500 rpm
Compression Ratio 8.9:1
Fuel/Induction System OHV
Exhaust Above Propeller
Intake Carburetor
Ignition System CDI
Spark Plug CR6HSB-000-000
Alternator Output 6 Amp (Optional: Requires Charging Kit
Starting System Manual
Lubrication Wet Sump
Engine Oil Capacity .6L (.63 qt)
Full Throttle RPM Range 4000-5000
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 (27:13) 2.08:1
Gear Shift Forward, Neutral, Reverse
Shaft Length S=15″ L=20″
Degree of Tilt 69°
Degree of Trim 5 positions
C.A.R.B. Rating 3-Star
Dry Weight F4SMHA = 27kg (60 lbs), F4LMHA = 28kg (62 lbs)
Steering Angle (maximum) 90° from center, either direction
Warranty 3-year Pleasure, 3-year Government, 1-year Commercial