F4
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.
- Only 60 pounds (15” shaft model)
- Available in 15” and 20” shaft lengths
- Solid 6-amp alternator
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
- Steering Angle (maximum): 90° from center, either direction
- Warranty: Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial
* Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).
COMPATIBILITY
The 139-cc 4-hp portable is available with tiller handle control and F-N-R shifting. Explore compatible components below and contact your dealer for rigging expertise.
Compatible Controls:
Multi-Function Tiller Handle
Compatible Gauges:
Command Link and Analog Gauges
FEATURES & BENEFITS
Power and Performance:
Lightweight, Portable Power
Surprising Performance
Record Setting Fuel Efficiency
Convenience and Control:
Lightweight, Portable Power
Surprising Performance
Record Setting Fuel Efficiency
RELIABILITY & DURABILITY
WET SUMP
A pressurized oil delivery system that incorporates a compact and durable oil pump to keep all of the moving parts of their Overhead Valve systems lubricated and running smoothly for maximum reliability.