PORTABLE 4 hp

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. Theres no stopping this little brute.

 

Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle

Only 59 pounds (15 shaft model)

Available in 15 and 20 shaft lengths

Solid 6-amp alternator

 

 

Engine Type 1 cyl

Displacement 139cc

Bore x Stroke 62 x 46mm (2.44 x 1.81in)

Prop Shaft Horsepower 4hp at 4500 rpm

Full Throttle RPM Range 4000 ~ 5000

Alternator Output at W.O.T. 6 Amp

Compression Ratio 8.9:1

Fuel Induction System Carb

Weight* 27 kg (59 lbs) - 28 kg (61 lbs)

Recommended Fuel Octane 87

Recommended Engine Oil Yamalube® 4M (See owner's manual)

Recommended Fuel Filtration N/A

C.A.R.B. Rating 3-Star

Exhaust Above Propeller

Intake 2

Ignition CDI

Spark Plug CR6HSB

Alternator Output 6 Amp

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°

Dry Weight 15" shaft / 27 kg (59 lbs), 20" shaft / 28 kg (61 lbs)

Mounting Centers N/A

Steering

Steering Angle (maximum) 90° from center, either direction

Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year CommercialPORTABLE 4 hp
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. Theres no stopping this little brute.

Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle
Only 59 pounds (15 shaft model)
Available in 15 and 20 shaft lengths
Solid 6-amp alternator


Engine Type 1 cyl
Displacement 139cc
Bore x Stroke 62 x 46mm (2.44 x 1.81in)
Prop Shaft Horsepower 4hp at 4500 rpm
Full Throttle RPM Range 4000 ~ 5000
Alternator Output at W.O.T. 6 Amp
Compression Ratio 8.9:1
Fuel Induction System Carb
Weight* 27 kg (59 lbs) - 28 kg (61 lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Filtration N/A
C.A.R.B. Rating 3-Star
Exhaust Above Propeller
Intake 2
Ignition CDI
Spark Plug CR6HSB
Alternator Output 6 Amp
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°
Dry Weight 15" shaft / 27 kg (59 lbs), 20" shaft / 28 kg (61 lbs)
Mounting Centers N/A
Steering
Steering Angle (maximum) 90° from center, either direction
Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year CommercialPORTABLE 4 hp
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. Theres no stopping this little brute.

Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle
Only 59 pounds (15 shaft model)
Available in 15 and 20 shaft lengths
Solid 6-amp alternator


Engine Type 1 cyl
Displacement 139cc
Bore x Stroke 62 x 46mm (2.44 x 1.81in)
Prop Shaft Horsepower 4hp at 4500 rpm
Full Throttle RPM Range 4000 ~ 5000
Alternator Output at W.O.T. 6 Amp
Compression Ratio 8.9:1
Fuel Induction System Carb
Weight* 27 kg (59 lbs) - 28 kg (61 lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Filtration N/A
C.A.R.B. Rating 3-Star
Exhaust Above Propeller
Intake 2
Ignition CDI
Spark Plug CR6HSB
Alternator Output 6 Amp
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°
Dry Weight 15" shaft / 27 kg (59 lbs), 20" shaft / 28 kg (61 lbs)
Mounting Centers N/A
Steering
Steering Angle (maximum) 90° from center, either direction
Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial


CONVENIENCE & CONTROL
EASY STORAGE
Yamahas F2.5, F4, and F6 feature our Easy Storage Oil Retention System. This pressurized oiling system prevents leaks, enabling on-side storage.  

COMFORTABLE CONTROL
Incredibly nimble, the F6 and F4 feature 180-degree steering and the F2.5 features 360-degree steering with a dynamically balanced and dampened twist-grip throttle for comfort and convenient maneuverabilty. 

PORTABILITY AND STORAGE
Built-in front and rear handles make these lightweights easy to carry. Resting pads and an easy oil retention system allow for convenient on-side storage without cowling scuffs or oil leakage.