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 (2713)

Recommended boat 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

Control - Tiller handle

Trim & tilt method - Manual

Lighting Coil / Alternator - 12V -6A*optional

Propeller - Included

Remark - The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft


This attractive engine, with its smart, stylish looks, offers all the power you need to hit the water with confidence. The F4 is also convenient to store - and so light and easy to handle that carrying one between the shore and the deck of your sailing boat really is a breeze.

The compact size, large carrying handle and built-in fuel tank all enhance its portability – and start-up is easy with Yamaha's CDI Ignition System. Low fuel consumption, simple controls and low noise and vibration levels, along with Yamaha reliability, come as standard.

So for families to get on the water easily - or for a yacht owner wanting a handy auxiliary - the F4 offers the smartest solution.

  • Shallow Water Drive for cruising close inshore

  • Unique 3-position oil-leak-free storage system

  • 180º steering for comfortable manoeuvring

  • Large F-N-R (Forward-Neutral-Reverse) shift lever

  • Built-in 1.1L fuel tank

  • 2-way change-over system for portable tank option

  • Lighting coil option offers 12V 6A power supply

  • Convenient auxiliary priming pump in the cowling

  • Auto decompression for easier starting

  • Stylish design with a smart grey top cowling

  • Latest-generation Yamaha styling and graphics

  • Lightweight and portable with a large carry handle

Contact: 0208 644 7004 - sales@bhlondon.com   Opening hours: Mon-Fri 9-5:30  Sat 9-4

Bh London, 1 Oldfields Road, Sutton, Surrey, SM1 2NB

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© Bh London 2019