Manufacturer
Yamaha 25hp
Japanese manufacturer of marine propulsion and boat-control systems, including electric propulsion products.
Official manufacturer website ↗
25hp
When you want to turn every day on the water into an occasion, this is the engine that makes it happen. The 25hp delivers big, confident performance in a smooth, composed package; all the fun, none of the fuss.
Key facts
- Family: Versatile
- Engine type: SOHC, In-line 2 cylinders
- Displacement: 432 cm³
- Rated output: 18.4 kW
- Weight: 56 kg - 70 kg
- Operating range: 5000 – 6000 r/min
- Fuel system: Fuel injection
Position in Yamaha range
The Versatile family covers smaller general-purpose outboards for tenders, fishing boats and compact installations.
This is model 1 of 6 in the Versatile family when the range is ordered from higher to lower rated output.
Neighbouring models
- Lower-output neighbour: 20hp
Before choosing
Verify the boat manufacturer’s permitted power range, transom height and shaft length, engine and rigging weight, steering and control compatibility, electrical load, propeller selection and the exact variant code before ordering. For twin or multiple-engine installations, confirm steering and control-system requirements as a complete package.
FAQ
- Is this the same as another Yamaha model with similar horsepower?
- Not necessarily. Yamaha can offer different families, control systems, shaft lengths, rotations or duty-oriented variants at a similar output. Compare the full specification rather than horsepower alone.
- What should be verified before installation?
- Confirm shaft or mounting configuration, steering and controls, electrical requirements, propeller selection, weight and the exact model or variant code.
Sources & verification
Technical data: Yamaha Motor Europe official product page. Official factsheet. Verified: 2026-09-06.
Engine
| Engine type | SOHC, In-line 2 cylinders |
|---|---|
| Displacement | 432 cm³ |
| Bore x stroke | 65.0 × 65.1 mm |
| Compression ratio | 9.1 : 1 |
| Fuel induction system | Fuel injection |
| Lubrication system | Wet sump |
| Engine oil capacity | 1.1 L / 1.0 L (with / without oil filter replacement) |
| Ignition / advance system | TCI |
| Alternator | 16 A |
Dimensions
| Overall length | MH, WH, WHP: 1130 mm, WHT, WHD: 1129 mm |
|---|---|
| Overall width | 378 mm |
| Overall height | S: 1106 mm, L: 1233 mm, X: 1320 mm |
| Engine transom height | S: 424 mm, S (ET, WT, WHT): 429 mm, L: 551 mm, L (ET, WT, WHT, WHD): 553 mm, X: 640 mm |
| Steering angle | 45 degrees each direction |
| Dry weight | 56 kg - 70 kg |
Performance
| Maximum propeller shaft output | 18.4 kW |
|---|---|
| Full throttle operating range | 5000 – 6000 r/min |
| Idling speed | 850 – 950 r/min |
Bracket/Drive
| Shallow water drive | Manual: 2 positions, ET, WT: PTT: variable position |
|---|---|
| Gear shift | F-N-R |
| Gear ratio | 2.08 (27/13) |
| Gear oil capacity | 0.370 L |