Manufacturer
Yamaha 70hp
Japanese manufacturer of marine propulsion and boat-control systems, including electric propulsion products.
Official manufacturer website ↗
70hp
Light, quick and bursting with personality; this is the engine that turns every trip into an excuse to stay out just a little longer. Work? Play? It's all the same to a 70hp that lives for open water and good company.
Key facts
- Family: Mid Power
- Engine type: SOHC L4 16 valves
- Displacement: 996 cm³
- Rated output: 51.5 kW
- Weight: 120 kg - 124 kg
- Operating range: 5300 – 6300 r/min
- Fuel system: Fuel injection
Position in Yamaha range
The Mid Power family covers mid-range outboards where boat size, weight, controls, shaft length and transom compatibility are central to selection.
This is model 2 of 8 in the Mid Power family when the range is ordered from higher to lower rated output.
Neighbouring models
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 L4 16 valves |
|---|---|
| Displacement | 996 cm³ |
| Bore x stroke | 65.0 × 75.0 mm |
| Compression ratio | 9.4 : 1 |
| Fuel induction system | Fuel injection |
| Lubrication system | Wet sump |
| Engine oil capacity | 2.1 L / 1.9 L (with / without oil filter replacement) |
| Ignition / advance system | TCI |
| Alternator | 15 A (battery charging: 9 A) |
Dimensions
| Overall length | 713 mm |
|---|---|
| Overall width | 386 mm |
| Overall height | L: 1484 mm, X: 1598 mm |
| Engine transom height | L: 534 mm, X: 648 mm |
| Steering angle | 40 degrees each direction |
| Dry weight | 120 kg - 124 kg |
Performance
| Maximum propeller shaft output | 51.5 kW |
|---|---|
| Full throttle operating range | 5300 – 6300 r/min |
| Idling speed | 700 – 800 r/min |
Bracket/Drive
| Shallow water drive | PTT: variable position |
|---|---|
| Gear shift | F-N-R |
| Gear ratio | 2.33 (28/12) |