Mercury
Mercury FourStroke 90: specifications
The Mercury FourStroke 90 is an outboard rated at 90 hp with inline four-cylinder architecture.
Key figures
- Power
- 90hp
- Dry weight
- 164kg
- Displacement
- 2,064cm³
- Alternator output
- 35A
- Indicative price
- n/a
- 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)
Technical specifications
Block & combustion
| Architecture | L4 |
|---|---|
| Cylinders | 4 |
| Cycle | 4-stroke |
| Displacement | 2,064 cm³ |
| Bore × stroke | 90 × 81 mm |
| Compression ratio | n/a |
| Max rpm | 5000–6000 rpm |
| Specific output | 44 hp/L |
| Fuel system | EFI |
| Min. fuel | RON 90 mini |
Transmission & gearcase
| Gear ratio | 2,07:1 |
|---|---|
| Propeller configuration | Mono-hélice |
| Counter-rotating dual prop | n/a |
| 2-speed gearbox | No |
| Counter-rotating version | Yes |
| Available shafts | L/X (20"/25") |
Weight & footprint
| Dry weight (transom load) | 164 kg (version la plus légère (à sec)) |
|---|---|
| Power-to-weight ratio | 0.55 hp/kg |
Electrical charging
| Alternator (max) | 35 A |
|---|---|
| Amps per horsepower | 0.39 A/hp |
Control & integration
| Digital throttle & shift (DBW) | No |
|---|---|
| Control | Télécommande ou Big Tiller (méca) |
| Steering | Télécommande ou Big Tiller |
| Power steering | No |
| Docking joystick | No |
| GPS position hold | No |
| Direct injection | No |
| VTEC (variable timing) | No |
Cost & warranty
| Public price | n/a |
|---|---|
| Cost per horsepower | n/a |
| 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 90 against Parsun F90 EFI · Suzuki DF90A · Tohatsu MFS90, on the criteria that drive the purchase.
| Criterion | FourStroke 90 | Parsun F90 EFI | Suzuki DF90A | Tohatsu MFS90 |
|---|---|---|---|---|
| Power hp | 90 | 90 | 90 | 90 |
| Dry weight kg | 164 | 183 | 156 | 178 |
| Power / weight hp/kg | 0.55 | 0.49 | 0.58✓ | 0.51 |
| Alternator output A | 35 | n/a | 27 | 41 |
| Cost per hp €/hp | n/a | n/a | 143 | 131 |
| Base warranty years | 2 | 2 | 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.
ParsunF90 EFI90 hp · 183 kg · 1.8 LSuzukiDF90A90 hp · 156 kg · 1.5 LTohatsuMFS9090 hp · 178 kg · 2 L