Engine Type | One-Cylinder | | |
Displacement | (139cc) | 8.5 ci | | |
Bore x Stroke | 62 x 46mm (2.44 x 1.81 in) | | |
Compression Ratio | 8.9:1 | | |
Prop Shaft Horsepower | 4hp at 4500 rpm | | |
Full Throttle RPM Range | 4000 ~ 5000 rpm | | |
Fuel Induction | OHV | | |
Intake | Carburetor | | |
Exhaust | Above Propeller | | |
Cooling | Water/Thermostatic Control | | |
Ignition | 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) | | |
Recommended Engine Oil | Yamalube® 4M (See owner's manual) | | |
Recommended Fuel Filtration | Yamaha mini-10 Fuel/Water Separating Filter (external) | | |
Recommended Fuel | Regular Unleaded (Minimum Pump Octane 87) | | |
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 |