Unique power-to-weight performance
This new-generation twin cylinder, 4-valve engine is around 25% lighter, delivering unprecedented power for such a portable unit. Easy starting and smooth running are assured by the battery-less EFI system and a choice of electric, manual or electric/manual starting options are available.
Latest, one-piece top cowling design
Instantly recognisable as a brand new Yamaha, this smart engine features our latest one-piece cowling, with stylish graphics and a solid feel that any owner will appreciate. A cleverly designed water-draining air intake duct is built into the cowling too.
Easy starting, security - and VTS
Starting - even from cold or after storage - really is as easy as starting a car. Exclusive to Yamaha, the combination of our legendary PrimeStart™ and new battery-less EFI systems ensures that your engine fires up first time, every time. What's more, you can choose VTS (Variable Trolling Speed) and Y-Cop immobiliser security options too.
Now compatible with Yamaha's Digital Network Gauges
You'll find the new 25hp very easy to handle and comfortable to drive, thanks to its many new features. Remote control models for example, are fully compatible with our advanced Digital Network system, which offers the driver a comprehensive selection of information, as well as a more precise and relaxing level of control.
Large multi-function tiller handle option
This great option brings all the engine controls neatly within reach of the driver and provides an even larger tiller for comfortable steering, handling and manoeuvring. Whether pottering around the marina or flying along at the higher speeds this remarkable engine can deliver, it makes the 25hp even more enjoyable to own and use.
High-output alternator - keeps the power coming
The 25hp will be put to a wide variety of tasks, from fishing at night to coastal cruising, so its High-output alternator is a comforting feature, ensuring that power should always be available to start the engine – even after prolonged periods of idling or if you've been running at low revs and using numerous accessories.
Shallow Water Drive system
Cruise towards the shore with confidence thanks to Yamaha's 2-position Shallow Water Drive system. Offering ample protection for your propeller, it allows you to get as close as you need to be, no matter whether you're cruising a murky lake or the crystal clear shallows of the sea.
Fresh Water Flushing system
An easy-access connector on the lower cowling allows you to easily flush salt and dirt from the waterways without having to run the engine - just connect a hose and you're ready to go. This is a very efficient way to reduce corrosion and extend the life of your outboard.
Technical SpecificationsDownload factsheet
- Engine type
- 432 cm³
- No. of cylinders/configuration
- 2/In-line, SOHC
- Bore x stroke
- 65.0 mm x 65.1 mm
- Prop shaft output at mid range
- 18.4 / 6,000 rpm
- Full throttle operating range
- 5,000 - 6,000 rpm
- Lubrication system
- Wet sump
- Fuel Induction System
- Ignition / advance system
- Starter system
- Electric/ Manual, Manual (MH), Electric (E, ET) with Prime Start™
- Gear ratio
- 2.08 (27:13)
- Recommended boat transom height
- Fuel tank capacity
- separate, 25litres
- Oil pan capacity
- Weight without propeller
- 56kg - 64kg
- Remote control (E, ET), Tiller handle (MH + WH)
- Trim & tilt method
- Power Trim & Tilt (ET), Manual Tilt (MH, E + WH)
- Lighting Coil / Alternator
- 12V -16A
- Engine immobiliser
- YCOP optional
- Included (MH, WH), Optional (E, ET)
- Variable Trolling RPM
- With DN Gauges or m-f tiller handle
- Tiller handle, Remote Control
- The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft