F4

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

PORTABLES PACKED WITH

PERFORMANCE

They weigh as little as 37 pounds, but all offer impressive features like electronic ignition, thermostatic cooling and 180-degree steering.

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.