16-valve SOHC engine layout
The SOHC (Single Overhead Camshaft) layout, with its large cylinder capacity and 16-valve format, results in optimum valve actuation, delivering improved acceleration and performance. Yamaha's latest 4-stroke technology combines this with advanced intake and exhaust system designs – and our unique multi-point Electronic Fuel Injection (EFI).
Large single throttle valve
This innovative system controls the flow of air to all four cylinders, pulse-tuning it before it reaches the injectors of the EFI system. The air is therefore delivered with ultimate precision, according to the demands of the driver and the combustion conditions.
Digital Network Gauges
The 100hp is compatible with Yamaha’s Digital Network Gauges (6Y8/6YC), giving you the information needed to maximise engine performance and efficiency, including a Multifunction Tachometer with RPM, Hours Run, Trim Angle, Oil Pressure, Warning lamps and Variable RPM control - and a Speed/Fuel Management Gauge with Speed, Tank Capacity and Fuel Economy
Easy control of engine RPM for trolling (with option)
Another feature of the Digital Network System option 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 550 and 1000 RPM. Smooth, relaxed cruising is the reward.
Wide Range Power Trim & Tilt
Discover the versatility and power of a Yamaha engine. Quick response, via push-button control, makes trim and tilt adjustments swift, smooth and easy. The confidence-giving handling control provided by the wide trim range includes negative trim settings to improve acceleration and help bring the boat onto the plane quickly.
Yamaha Customer Outboard Protection (Y-COP) option
The optional Y-COP immobiliser system is simple, easy to use and highly effective – a neat and simple remote control locks and unlocks the engine at the push of a button. This prevents your outboard engine being taken for any unauthorised joyrides, offering you peace of mind when leaving your boat unattended.
Micro-computer ECM (Engine Control Module)
A reliable micro-computer is the 'brain' of your engine. By constantly monitoring all data inputs and settings, it helps to ensure smooth running and optimised ignition timings – as well as automatically activating warning and protection systems. A handy access port lets authorised Yamaha dealers easily diagnose any problems.
Technical SpecificationsDownload Factsheet
- Engine type
- 1,832 cm³
- No. of cylinders/Configuration
- 4/In-line, 16-valve, SOHC
- Bore x stroke
- 81.0 mm x 88.9 mm
- Prop shaft output at mid range
- 73.5 / 5,500 rpm
- Full Throttle Operating Range
- 5,000 - 6,000 rpm
- Lubrication system
- Wet sump
- Fuel Induction System
- Ignition / advance system
- Starter system
- Electric with Prime Start™
- Gear ratio
- 2.15 (28:13)
- Transom height
- Fuel tank capacity
- Oil pan capacity
- Weight without propeller
- 162kg - 166kg
- Remote Control
- Trim & Tilt method
- Power Trim & Tilt
- Light coil / Alternator Output
- 12V -35Awith rectifier/regulator
- Engine immobilizer
- YCOP optional
- Variable Trolling Speed
- With DN Gauges or m-f tiller handle
- Shift Dampener System (SDS)
- The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft