YAMAHA OUTBOARD MOTORS
Adventure Bound
Part Number: F4BMHL
- ✔Lightweight and compact for easy transport and storage.
- ✔Single-cylinder, four-stroke OHV engine built for smooth and reliable operation
- ✔Specially developed four-stroke Overhead Valve (OHV) design
- ✔Excellent fuel efficiency
- ✔Smooth running performance
- ✔Superior user experience with Yamaha’s attention to detail
Ergonomic Carry and Control Handles – Large comfortable grips located on the front and back of the engine makes carrying, mounting and removing this engine easier. The tiller handle folds neatly back to make the engine even more compact for carrying and storage.

External Fuel Tank Tap – For increased range and convenience this engine includes a switch-over facility which allows for the quick connection of an additional external fuel tank, should it be required.

Easy Start Decompression Device –This engine features an auto decompression device fitted to the camshaft for easier pull starting. This system releases pressure in the cylinder when the manual pull start is engaged, allowing for light and convenient pull starting.

Two-Way Throttle Control –Throttle is controlled by a two-way cable rather than relying on a traditional throttle return spring. This ensures long term durability, added safety and an enhanced feeling of immediate control.

139cc Single-Cylinder –The twin valve, single-cylinder, compact four-stroke engine produces clean exhaust gas with high combustion efficiency.

180° Steering –With a full 90° left and right turning circle, this engine makes turning and manoeuvring around docks and other vessels, simple and easy.

Three-Way Storage Positions –With the special leak-free oil storage system and tuck away tiller handle, you can safely lie the engine on its front, right or left-hand side, for convenient transportation and storage.

Oil Leak Prevention System –Yamaha’s oil leak prevention system allows the engine to be stored safely on its front, left or right-hand side. This means you no longer have to worry about oil leakage while transporting this engine or holding it in storage.

Built-in See Through Fuel Tank –The handy 1.1 Litre built-in fuel tank is extremely convenient for transport and allows uncluttered deck space in small boats. The semi-transparent tank makes it easy to fill and easy to check remaining fuel supply. A built in, internal primer pump allows for easy pull starting.

Anti Corrosion Paint System –Yamaha engines are known for their durability and high re-sale value. Part of this lies in the anti-corrosion protection systems. A unique YDC-30 aluminium alloy and 5-stage exterior paint protects the engine’s exterior parts, while high-quality, marine-grade, stainless steel componentry is used throughout.
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Codes
F4BMHL
Height
S: 435 [17.1] | L: 562 [22.1]
Weight
S: 27 | L: 28
Category
81
Engine
4-Stroke, OHV, 1-cylinder
Displacement
139
Bore
62 x 46
Max RPM
4000-5000
Spec Config
Marine Outboard
Lubrication
Wet sump
Fuel
Carb
Ignition
CDI
Starter
Manual Choke
Alternator
12V – 6A with Rectifier Regulator (Optional)
Operation
Tiller Handle
Tilt
Manual Tilt
Guages
N/A
N/A
1.1
2.08:1
3
1