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Yamaha 6 / 4 / 2.5 HP

Yamaha’s smallest Portables, the F6, F4 and F2.5, weigh in at as little as 37 pounds, with streamlined overhead-valve, one-cylinder designs. Their light weights, combined with built-in carrying handles, resting pads and an oil-leak prevention system for on-side storage capability create true portability.

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Features
Specifications

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.

Ultra-Low Emissions

The Portable F6, F4 and F2.5 are California Air Resources Board (C.A.R.B.) Two-Star Rated for Ultra-Low Emissions and meet federal EPA requirements.

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.

 

 

Engine Type 1 cyl
Displacement 139cc
Bore x Stroke 62 x 46mm (2.44 x 1.81in)
Prop Shaft Horsepower 6hp at 5000 rpm / 4hp at 4500 rpm / 2.5hp at 5500 rpm
Full Throttle RPM Range 4500 ~ 5500
Alternator Output at W.O.T. 6 Amp
Compression Ratio 8.9:1
Fuel Induction System Carb
Weight27 kg (59 lbs) - 28 kg (61 lbs) / 17 kg (37 lbs) - 20 kg (40lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner's manual)

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