Mercury
Mercury FourStroke 25 EFI: specifications
The Mercury FourStroke 25 EFI is an outboard rated at 25 hp with inline three-cylinder architecture.
The essentials
Ahead in this comparison
- Alternator output17 Arivals: 10 to 16 A
Key figures
- Power
- 25hp
- Dry weight
- 60kg
- Displacement
- 500cm³
- Alternator output
- 17A
- Indicative price
- 5,523€
- Maximum warranty
- 5years
Sources and technical context
Document year: 2018.
Manufacturer's official documentation. The original document link has not yet been recorded for this page.
Notes and conditions (FR)
Mercury UVP-Preisliste DE 2026. Indicative source price: request a quote for your country, date and required configuration.
Technical specifications
Block & combustion
| Architecture | L3 |
|---|---|
| Cylinders | 3 |
| Cycle | 4-stroke |
| Displacement | 500 cm³ |
| Bore × stroke | 61 × 57 mm |
| Compression ratio | n/a |
| Max rpm | 5400–5800 rpm |
| Specific output | 50 hp/L |
| Fuel system | EFI (sans batterie) |
| Min. fuel | RON 90 mini |
Transmission & gearcase
| Gear ratio | 2,17:1 |
|---|---|
| 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) | 60 kg (version la plus légère (à sec)) |
|---|---|
| Power-to-weight ratio | 0.42 hp/kg |
Electrical charging
| Alternator (max) | 17 A |
|---|---|
| Amps per horsepower | 0.68 A/hp |
Control & integration
| Digital throttle & shift (DBW) | No |
|---|---|
| Control | Télécommande ou barre franche (méca) |
| Steering | Barre franche ou télécommande |
| Power steering | No |
| Docking joystick | No |
| GPS position hold | No |
| Direct injection | No |
| VTEC (variable timing) | No |
Cost & warranty
| Public price | 5,523 € |
|---|---|
| Cost per horsepower | 221 €/hp |
| Base warranty | 2 years |
| Maximum warranty (conditional) | 5 years |
Operation & compliance
| Emissions standard | RCD 2013/53/UE |
|---|
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 FourStroke 25 EFI against Honda BF25 · Selva Amberjack 25 EFI · Suzuki DF25A, on the criteria that drive the purchase.
| Criterion | FourStroke 25 EFI | Honda BF25 | Selva Amberjack 25 EFI | Suzuki DF25A |
|---|---|---|---|---|
| Power hp | 25 | 25 | 25 | 25 |
| Dry weight kg | 60 | 70.5 | 56✓ | 63 |
| Power / weight hp/kg | 0.42 | 0.35 | 0.45✓ | 0.4 |
| Alternator output A | 17✓ | 10 | 16 | 14 |
| Cost per hp €/hp | 221 | n/a | 190 | 214 |
| Base warranty years | 2 | 3 | 5 | 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.