Yamaha / FourStroke
Yamaha F4
Our 139-cc 4-hp portable outboard mirrors our OHV F6, with a couple less horses.
FourStroke
F4
- Power
- 4 hp
- Configuration
- 1 cyl
- Displacement
- 139cc
- Weight
- 27 kg (60 lbs) - 28 kg (61 lbs)
dealerAbout this engine
Our 139-cc 4-hp portable outboard mirrors our OHV F6, with a couple less horses. It features the same ergonomic, easy-grip starter handle with a built-in decompression device for effortless starts. The F4 also features a built-in fuel tank with the option of switchable access to an additional external tank for amazing extended range. There’s no stopping this little brute.
Key features
- Lightweight, Portable Power
- Surprising Performance
- Record Setting Fuel Efficiency
- EASY STORAGE
- COMFORTABLE CONTROL
- PORTABILITY AND STORAGE
Full specifications
- Weight †
- 27 kg (60 lbs) - 28 kg (61 lbs)
- Full Throttle RPM Range
- 4000 ~ 5000
- Fuel Induction System
- Carb
- Recommended Engine Oil
- Yamalube® 4M (See owner's manual)
- Engine Type
- 1 cyl
- Displacement
- 139cc
- Bore x Stroke
- 62 x 46mm (2.44 x 1.81in)
- Prop Shaft Horsepower
- 4hp at 4500 rpm
- Alternator Output at W.O.T.
- 6 Amp
- Compression Ratio
- 8.9:1
- Recommended Fuel
- Octane 87
- Recommended Fuel Filtration
- N/A
- C.A.R.B. Rating
- 3-Star
- Exhaust
- Above Propeller
- Intake
- 2
- Ignition
- CDI
- Spark Plug
- CR6HSB
- Starting System
- Manual
- Lubrication
- Wet Sump
- Engine Oil Capacity
- 0.6L
- Recommended Cooling
- Thermostatic Control
- Ethanol Blend Limit
- 10% Maximum
- Gear Ratio
- 2.08:1
- Gear Shift
- Forward, Neutral, Reverse
- Shaft Length
- 15" - 20"
- Degree of Tilt
- 69°
- Degree of Trim
- -4° through +16°
- Mounting Centers
- N/A
- Steering Angle (maximum)
- 90° from center, either direction
- Warranty
- Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial
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