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!
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.
3-position storage system prevents oil leaks
When taking your engine to and from the water - or storing it - the last thing you need is a messy oil leak. Yamaha's unique engine breather system allows the engine to be stored on its front or either side without danger of oil leaking onto your dock or deck - or into the boat locker or car boot.
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.
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.
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.
Technical SpecificationsDownload Factsheet
- Engine type
- 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
- Ignition / advance system
- Starter system
- Gear ratio
- 2.08 (27:13)
- Recommended boat transom height
- 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
- Tiller handle
- Trim & tilt method
- Lighting Coil / Alternator
- 12V -6A*optional
- The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft