Yamaha
Yamaha F4: specifications
The Yamaha F4 is an outboard rated at 4 hp with single-cylinder architecture.
Key figures
- Power
- 4hp
- Dry weight
- 27kg
- Displacement
- 139cm³
- Alternator output
- 6A
- Indicative price
- 1,245€
- Maximum warranty
- 3years
Sources and technical context
Document year: 2024.
Notes and conditions (FR)
Tarif EU 2024. Indicative source price: request a quote for your country, date and required configuration.
Technical specifications
Block & combustion
| Architecture | 1 cyl. |
|---|---|
| Power (kW) | 2.9 kW |
| Cylinders | 1 |
| Cycle | 4-stroke |
| Displacement | 139 cm³ |
| Bore × stroke | 62 × 46 mm |
| Compression ratio | 8,9:1 |
| Max rpm | 4000–5000 rpm |
| Specific output | 29 hp/L |
| Fuel system | 1 carburateur |
| Min. fuel | RON 90 (PON 86) |
Transmission & gearcase
| Gear ratio | 2,08:1 |
|---|---|
| Propeller configuration | Mono-hélice |
| Counter-rotating dual prop | n/a |
| 2-speed gearbox | No |
| Counter-rotating version | No |
| Available shafts | S/L (15"/20") |
Weight & footprint
| Dry weight (transom load) | 27 kg (15") |
|---|---|
| Power-to-weight ratio | 0.15 hp/kg |
Electrical charging
| Alternator (max) | 6 A |
|---|---|
| Amps per horsepower | 1.50 A/hp |
Control & integration
| Digital throttle & shift (DBW) | No |
|---|---|
| Control | Barre franche |
| Steering | Barre franche |
| Power steering | No |
| Docking joystick | No |
| GPS position hold | No |
| Direct injection | No |
| VTEC (variable timing) | No |
Cost & warranty
| Public price | 1,245 € |
|---|---|
| Cost per horsepower | 311 €/hp |
| Base warranty | 2 years |
| Maximum warranty (conditional) | 3 years |
Operation & compliance
| Fuel burn at WOT | 1.7 L/h |
|---|---|
| Emissions standard | RCD |
Head to head with its direct rivals
Prices, warranties and test conditions are not harmonised. They remain visible but do not determine strengths or rankings.
Side-by-side figures for the F4 against Honda BF4 · Mercury FourStroke 4 · Selva Sea Bass 4, on the criteria that drive the purchase.
| Criterion | F4 | Honda BF4 | Mercury FourStroke 4 | Selva Sea Bass 4 |
|---|---|---|---|---|
| Power hp | 4 | 4 | 4 | 4 |
| Dry weight kg | 27 | 27 | 26 | 23✓ |
| Power / weight hp/kg | 0.15 | 0.15 | 0.15 | 0.17✓ |
| Cost per hp €/hp | 311 | 365 | 381 | 292 |
| Base warranty years | 2 | 3 | 2 | 5 |
An index requires at least two criteria documented for every compared engine. “n/a” means the available data cannot assess this use; it is not a poor rating.
HondaBF44 hp · 27 kg · 0.1 LMercuryFourStroke 44 hp · 26 kg · 0.1 LSelvaSea Bass 44 hp · 23 kg · 0.1 L