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Key Features

Features Gallery
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    Easy and comfortable to carry about - ashore or on board

    When you want to get out on to the water quickly, easy portability is important - and the F4 is the ultimate in portable power, with its compact shape and large, comfortable carry handle. So this engine is ultra- easy to take down to the water - or to lift on to your main boat as an auxiliary.

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    Smart grey cowling and latest design graphics

    In keeping with its unique character, the F4 features very stylish looks, with a smart grey top cowling and the very latest generation Yamaha graphics and styling. It's a refreshing design that reflects the playfulness of this compact and portable engine – and the fun and adventure it offers.

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    Optional lighting coil gives 12V 6A power supply

    The convenient option of a lighting coil and voltage regulator/rectifier provides a reliable 12V 6A power supply for running lights or charging batteries. Great for a bit of exploring or fishing at night!

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    Built-in fuel tank with switch-over facility for remote tank

    The handy built-in 1.1 litre fuel tank is great for portability and makes more room for gear in the boat, whether that's another box of bait, or an extra cooler of refreshments. For longer trips, simply plug in a remote tank (available as an option) and twist the 2-way tap.

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    180º steering with friction and throttle adjustment

    Handling is a joy, thanks to the simple steering friction control adjustment and the ability to steer a full 90º turn to left or right, which makes light work of tight turns and docking. Throttle trim is easy to adjust too, so when you're out on the water, you can be sure of great stability and control, even at high speed.

Technical Specifications

Download Factsheet
  • Engine
    Engine type
    4-stroke
    Displacement
    139 cm³
    No. of cylinders/Configuration
    1, OHV
    Bore x stroke
    62.0 mm x 46.0 mm
    Prop shaft output at mid range
    2.9 / 4,500 rpm
    Full Throttle Operating Range
    4,000 - 5,000 rpm
    Lubrication system
    Wet sump
    Fuel Induction System
    1-Carb
    Ignition / advance system
    CDI
    Starter system
    Manual
    Gear ratio
    2.08 (27:13)
  • Dimensions
    Transom height
    S435L:562mm
    Weight with propeller
    F4BMHS: 27.0kg,F4BMHL: 28.0kg
    Fuel tank capacity
    1.1litres(Built-in fuel tank) or optional seperate fuel tank
    Oil pan capacity
    0.6litres
    Weight without propeller
  • Additional Features
    Control
    Tiller handle
    Trim & Tilt method
    Manual
    Light coil / Alternator Output
    12V -6A*optional
    Propeller
    Included
    Remark
    The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft
  • Electric-Drive Technical specs
  • Hydra-Drive engine specifications