four-cylinder150hp

Electro-Hydraulic Steering (EHS) is now built-in to select 150hp engines. Enjoy a clean, spacious bilge with no hoses or external rams. No need for fluid filling and clean-up, and no special bleeder ports or hoses. Technicians can rig EHS significantly faster and more easily, plus EHS equipped engines can be fitted with the new optional Helm Master EX system.

With two intake valves and two exhaust valves on each cylinder, each with twin camshafts, which are also driven independently, intake and exhaust efficiency are dramatically improved, optimising fuel use during combustion. The TCI ignition system ensures easy starting, consistency, longer plug life and therefore the ultimate reliability.

Whether re-powering a current vessel or rigging a brand new boat; integrated hydraulic steering offers many of the benefits of the integrated Electro-Hydraulic Steering such as a better, tidier appearance and quicker fitting.

Offering the driver simple, comfortable control, the optional Digital Network System automatically synchronises engines in twin or triple installations and offers a one-touch Start/Stop button. Our premium multi-function display gauge, with its five inch LCD colour screen is another attractive option for the 150hp model.

Get going with electric keyless ignition, then dive into enhanced handling features for single and twin-engine boats with the precision joystick control system. Kick back and enjoy the view with AutoPilot and keep an easy eye on things as a light on the engine shows when the unit is in gear.

We designed the 150hp to be ultra-compact and the special offset crankshaft and gear-driven balance shaft are just two of the many technical advances pioneered by our engineers to help achieve that aim. The labyrinth exhaust system, with its water-sealed outer walls make it exceptionally quiet too.

Yamaha’s exclusive TotalTilt™ function allows complete tilt up or down (until trim ram contacts) from any position with a simple double-push of the respective tilt button. During the process, a buzzer sounds to alert crew to keep clear of the outboard, and the integrated tilt limiter can be customised to suit any boat.

Another feature of the optional Digital Network System is the handy button on the tachometer which gives you instant control of the engine rpm making it simple to adjust the engine speed in convenient steps of 50 rpm between 650 and 900 rpm. Smooth, relaxed cruising is the reward.

First introduced for our larger V8 and V6 models, Yamaha’s patented Shift Dampener System (SDS) is a great feature that significantly reduces the ‘clunk’ sound normally associated with moving between gears. A splined rubber hub and aft washer absorb noise and vibration, in a carefully engineered solution that gives smoother, quieter gear shifts.

All our EFI engines can be linked, via Yamaha’s own network system, to a wide range of digital instruments to help you get the best from your engine. A multi-function, colour CL5 display fits seamlessly into your console, while its compact size permits more room for other electronic equipment on your console.