Yamaha's 4-stroke technology - it's the Number One difference!

A Yamaha 4-stroke seems to think it's a 2-stroke! In recent years, our driving ambition in outboard design has been to combine the lightness and compactness of the incredibly reliable, high performance 2-strokes that made us so famous, with the superior economy, smoothness, sophistication and environment-friendliness of 4-stroke engine technology. The Yamaha Four Stroke line-up now offers the previously impossible: A complete range of 4-stroke engines, all comparable in weight and size to 2-stroke outboards in the same power class. The key was YAMAHA innovation: look at our Four Stroke range and you'll see technologies like CDI ignition, advanced EFI (Electronic Fuel Injection) systems, revolutionary engine layouts, ingenious intake and exhaust systems ... even VCT (Variable Camshaft Timing); all with a ruthlessly efficient system of micro-computer control monitoring every aspect - from fuel mix - to combustion efficiency - to maintenance scheduling. It's no accident that a Yamaha Four Stroke outboard holds the world record for fuel economy.

Above all, Yamaha's 4-strokes succeed so admirably because from the very start, we never tried to adapt ordinary, everyday automotive engines, as most others have done. We built only pure marine-specification 4-stroke engines from scratch: every cubic centimetre, inside and out, designed with on-water performance in mind , and dedicated to your on-water pleasure!

Standard on every Yamaha.

Yamaha's CDI and TCI ignition systems are 'solid state' components, with no moving parts. This plays an important role in creating the remarkable record of easy starting, reliability and faultless performance for which Yamaha outboards are well known around the world.

• Reliable and easy starting
• Strong, steady spark generation at all speeds
• Consistency of spark allows longer plug life
• Maintenance free system

Standard on most Yamaha models.

• Enables boat to be operated safely in shallow water
• Protects propeller and allows manoeuvring close inshore

Standard on most Yamaha models.

Compared with most competitive models, Yamaha engines have a high-output alternator to ensure that plenty of power is always available to start the engine, even after prolonged periods of idling, or using multiple accessories when running at low revs.

Exclusive to Yamaha, the PrimeStart^TM Auto-choke feature is standard on many models. As easy as starting your car, it enables the driver to start an engine from cold by simply turning the key! The system eliminates the need for a conventional choke and controls the ‘warming up' process automatically. So there's no longer any need to ‘warm up' by revving the engine in neutral.

Standard (or available as an option) on most models 20hp and above.

Yamaha's compact and light, yet powerful PT & T system is the envy of the industry. Quick response from the convenient push-button control makes trim and tilt very smooth and easy, and the -4º to +16º position range enables the driver to get the best possible performance from the hull in all conditions. The negative trim setting improves acceleration and brings the boat onto the plane more quickly.

'Start-in-gear' protection prevents the engine being started when Forward or Reverse is selected. On Manual Start models, setting any gear other than Neutral will cause the recoil starter to lock. On Electric Start versions, the power supply to the starter motor is isolated unless Neutral is selected.

Depending on the model, all Yamaha outboards feature comprehensive monitoring of major functions, such as oil level, engine overheat or over-rev. There are various warning devices fitted to alert the user, including cowling-mounted lamps, instrument lamps, and buzzers. In the unlikely event of a problem, the system will automatically reduce the available engine rpm, providing maximum protection for the engine while the fault exists, and allowing the best opportunity to get the boat back to shore without damage.

The ECM is a sophisticated micro-computer; the 'brain' behind many of the functions that make a Yamaha so reliable and user-friendly.

In fact, the ECM monitors and controls a variety of functions and features, depending on the model, and is responsible for everything from running the ignition timing and controlling PrimeStart^TM, to activating the many warning and protection systems that look after the engine and the user. In reality, it is almost the 'heart' of a Yamaha as well as the 'brain'. On all models from 50hp upwards, a simple hook-up to a laptop computer via the convenient access port, allows instant engine diagnosis, on the spot. Now that's real progress!

• Constant monitoring of all data inputs and settings
• Maintains smooth running, trouble-free performance
• Advanced software optimises ignition timing in all conditions
• Monitors and activates warning and protection systems
• Computer engine diagnosis on all models 50hp and above

FL115 - FL150 - FL200 - FL225 - L200 - L250 - ZL150 - ZL200 - ZL250 - ZL300.

A standard twin engine installation (with both propellers turning clockwise) will always 'pull' the boat towards the port side, making it more difficult to steer, especially at higher speeds. To solve this problem, Yamaha offers certain models with a counter-rotating propeller, which when fitted alongside a standard model, delivers perfect 'neutral helm' steering control.

Standard on all models 6hp and above.

Another user-friendly and simple idea from the Yamaha engineers! Just connect a garden hose to the easy-access, front-mounted connector and flush away the salt and other dirt that accumulates in the engine waterways. Obviously it helps reduce any corrosion and extends the life of the engine still further. And there's no need to even start the engine to carry out this simple maintenance procedure.

• Reduces corrosion and extends engine life
• Convenient, simple connection and operation
• Flush with no need to start or run the engine

Digital instrumentation is available on many Yamaha outboards, either as standard, or as an optional accessory. Designed for optimal visibility and long term durability, these instruments provide accurate information to help achieve the best overall performance and efficiency from the engine. Three instruments are available: a Multifunction Tachometer that displays engine rpm, engine hours, trim angle, oil level and warning lamps; a Multifunction Speedometer that displays speed, trip, time, fuel and battery voltage; and a Fuel Management Gauge that monitors fuel consumption and fuel economy. For 2007 models with EFI (Electronic Fuel Injection) or HPDI fuel systems, an exciting new range of Digital Network Gauges, which work together with a new and sophisticated Local Area Network (LAN) system has been launched.

Dual Battery Charging System

Option on F200, F225, F250 and HPDI models.

Two batteries are charged at the same time, to ensure that there is plenty of power available for starting the engine, even after long periods of trolling at low revs.