Mercury
Mercury FourStroke 3.5: specifications
The Mercury FourStroke 3.5 is an outboard rated at 3.5 hp with single-cylinder architecture.
Key figures
- Power
- 3.5hp
- Dry weight
- 18kg
- Displacement
- 85cm³
- Alternator output
- n/a
- Indicative price
- 1,149€
- Maximum warranty
- 5years
Sources and technical context
Document year: 2025.
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 | L1 |
|---|---|
| Cylinders | 1 |
| Cycle | 4-stroke |
| Displacement | 85 cm³ |
| Bore × stroke | 55 × 36 mm |
| Compression ratio | n/a |
| Max rpm | 5000–6000 rpm |
| Specific output | 41 hp/L |
| Fuel system | Carburateur |
| Min. fuel | RON 90 mini |
Transmission & gearcase
| Gear ratio | 2,15:1 |
|---|---|
| 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) | 18 kg (version la plus légère (à sec)) |
|---|---|
| Power-to-weight ratio | 0.19 hp/kg |
Electrical charging
| Alternator (max) | n/a |
|---|---|
| Amps per horsepower | n/a |
Control & integration
| Digital throttle & shift (DBW) | No |
|---|---|
| Control | Barre franche 360° (méca, AV/point mort) |
| Steering | Barre franche 360° |
| Power steering | No |
| Docking joystick | No |
| GPS position hold | No |
| Direct injection | No |
| VTEC (variable timing) | No |
Cost & warranty
| Public price | 1,149 € |
|---|---|
| Cost per horsepower | 328 €/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 3.5 against Tohatsu MFS3.5 · Honda BF4 · Selva Sea Bass 4, on the criteria that drive the purchase.
| Criterion | FourStroke 3.5 | Tohatsu MFS3.5 | Honda BF4 | Selva Sea Bass 4 |
|---|---|---|---|---|
| Power hp | 3.5 | 3.5 | 4 | 4 |
| Dry weight kg | 18 | 18.5 | 27 | 23 |
| Power / weight hp/kg | 0.19 | 0.19 | 0.15 | 0.17 |
| Cost per hp €/hp | 328 | 305 | 365 | 292 |
| Base warranty years | 2 | 7 | 3 | 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.