F4Compact, light weight and powerful.

Filling a vital horsepower bracket in the Australian market, the all new F4B has been designed to be easy to use and exceptionally smooth running. With a range of exclusive features, increased capacity for greater performance as well as the latest generation cowl design and graphics, the F4B is sure to be a popular addition to Yamaha’s current engine line up.

For easy transport and mounting the F4B is fitted with an ergonomically designed grasp on the front of the motor and a large carry handle on the rear. The engine also features Yamaha’s unique oil leak prevention system which allows the owner to store or transport the engine on either side or its front without leaking engine oil. This means worry free transport in a car boot and hassle free storage.


Engine TypeOHV, 1-cylinder
Displacement139 cc
Bore x Stroke62 x 46 mm
Recommended Max RPM4000-5000
Lubrication SystemWet sump
Fuel ManagementCarb
Starter SystemManual Choke
Operation MethodTiller Handle
Trim & Tilt MethodManual Tilt
Fuel Tank Capacity1.1 L
Gear Ratio2.08:1
OEDA Emission Rating
  • F4BMHS : 432 mm (17 in)
  • F4BMHL : 508 mm (20 in)
  • F4BMHS : 27 kg
  • F4BMHL : 28 kg



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