Mercury
Mercury FourStroke 9.9: specifications
The Mercury FourStroke 9.9 is an outboard rated at 9.9 hp with inline-twin architecture.
Key figures
- Power
- 9.9hp
- Dry weight
- 38kg
- Displacement
- 209cm³
- Alternator output
- 12A
- Indicative price
- 3,480€
- 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 | L2 |
|---|---|
| Cylinders | 2 |
| Cycle | 4-stroke |
| Displacement | 209 cm³ |
| Bore × stroke | 55 × 44 mm |
| Compression ratio | n/a |
| Max rpm | 5000–6000 rpm |
| Specific output | 47 hp/L |
| Fuel system | Carburateur |
| Min. fuel | RON 90 mini |
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/X (15"/20"/25") |
Weight & footprint
| Dry weight (transom load) | 38 kg (version la plus légère (à sec)) |
|---|---|
| Power-to-weight ratio | 0.26 hp/kg |
Electrical charging
| Alternator (max) | 12 A |
|---|---|
| Amps per horsepower | 1.21 A/hp |
Control & integration
| Digital throttle & shift (DBW) | No |
|---|---|
| Control | Barre franche ou télécommande (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 | 3,480 € |
|---|---|
| Cost per horsepower | 352 €/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 9.9 against Selva Amberjack 9.9 XS EFI · Suzuki DF9.9A · Tohatsu MFS9.9, on the criteria that drive the purchase.
| Criterion | FourStroke 9.9 | Selva Amberjack 9.9 XS EFI | Suzuki DF9.9A | Tohatsu MFS9.9 |
|---|---|---|---|---|
| Power hp | 9.9 | 9.9 | 9.9 | 9.9 |
| Dry weight kg | 38✓ | 56 | 41.5 | 43 |
| Power / weight hp/kg | 0.26✓ | 0.18 | 0.24 | 0.23 |
| Alternator output A | 12 | 16✓ | 6 | 12 |
| Cost per hp €/hp | 352 | n/a | 380 | 343 |
| Base warranty years | 2 | 5 | 5 | 7 |
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.