2023 Yamaha 4HP For Sale – 20″ Shaft

2023 Yamaha 4HP For Sale – 20″ Shaft

Availability: In Stock
Year: 2023
Make: Yamaha
Model: 4HP – 20″ Shaft
SKU: 95495 Category:


2023 Yamaha 4HP For Sale – 20″ Shaft

Engine Type 1 Cylinder
Bore x Stroke 2.44 x 1.81 in. (62 x 46 mm)
Displacement 139 cc
Starting Manual
Shaft Length 20 in.
Weight 61 lb. (28 kg)
Propshaft Horsepower 4 HP at 4500 RPM
Full Throttle Operating Range 4000 ~ 5000 RPM
Gear Ratio / Shift 2.08:1 / Forward, Neutral, Reverse
Fuel Induction Carb
Alternator 6 Amp
Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial


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.

  • Lightweight, Portable Power: They may weigh as little as 37 pounds, but these Overhead-Valve portable outboards are packed with features that create smooth, quiet power. This includes a CDI or TCI ignition system, an optimally balanced crankshaft, a long span mounting system and a labyrinth exhaust.
  • Surprising Performance: The portable F6, F4 and F2.5 all offer impressive features like electronic ignition, thermostatic cooling and 180-degree steering.
  • Record Setting Fuel Efficiency: Small motors use less fuel, but according to the Guinness Book of World Records, the Yamaha F4 actually set a world record for fuel efficiency, traveling 67.27 continuous statute miles on one gallon of gas.
  • Easy Operation: The F6, F4 and F2.5 feature built-in, see through fuel tanks. The F6 and F4 also feature switchable access to an optional, 3.1-gallon external fuel tank for extended range.
  • 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.
  • Corrosion Protection: Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five™ electro-deposited, anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha Portable outboards.
  • Maximum Efficiency: The F6, F4 and F2.5 have a carburetor with a factory-selected setting for maximum efficiency, which helps them achieve a C.A.R.B. Three-Star Rating for Ultra-Low Emissions. Additionally, automatic decompression, built-in auxiliary priming and start-in-gear prevention help make for easier starts.
  • Easy Storage: Yamaha’s 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.
  • 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 †: 28 kg (61 lbs)
  • Recommended Fuel: Octane 87
  • Recommended Engine Oil: Yamalube® 4M (See owner’s manual)
  • 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: 20″
  • Degree of Tilt: 69°
  • Degree of Trim: -4° through +16°
  • Dry Weight: 28 kg (61 lbs)
  • Steering Angle (maximum): 90° from center, either direction
  • Warranty: Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial.

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