Outboards

Taking the fun with you is a great advantage of inflatable boats and small fishing boats. Mercury offers a complete line of portable FourStroke outboards that are extremely light, with the widest range of models to choose from. The entire line makes operation and portability easy with smart, simple features. Plus, clean, quiet, fuel-efficient FourStroke performance makes them the obvious power of choice.

2.5 HP

2.5 Four Stroke Specifications

  • Patented one-piece integrated cylinderblock design provides added reliability by eliminating gaskets and fasteners and makes the powerhead much more compact and lightweight.
  • Check oil level without removing the cowling with convenient, easy-to-view sight gauge.
  • This engine delivers maximum performance with the largest displacement in the 2.5 hp category.
  • A twist-grip throttle and 360-degree steering make it easy to use.

2.5 HP Four Stroke

HP @ Prop2.5
kW @ Prop1.84
Max RPM (WOT)5000-6000
Cylinder/Configuration1
Displacement (CID/cc)5.2/85
Bore & Stroke (in)2.16 x 1.42
Bore & Stroke (mm)55 x 36
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/electric spark advance
StartingManual
Gear Ratio2.15:1
Gear ShiftF-N
SteeringTiller with 360° turning
Trim Positions4
Exhaust SystemAbove prop
Lubrication SystemSplash
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity300 mL / 10 oz
Fuel Induction System2-valve single overhead cam
Integral Fuel Tank (Gal)0.3
Integral Fuel Tank (L)0.95
Shaft Length (inches)15
Shaft Length (mm)381
Dry Weight (lbs.)38
Dry Weight (kg.)17
Available PropellersStandard equipment
Warranty3 years
CARB Star Rating3

3.5 HP

3.5 Four Stroke Specifications

  • Patented one-piece integrated cylinderblock design provides added reliability by eliminating gaskets and fasteners and makes the powerhead much more compact and lightweight.
  • Check oil level without removing the cowling with convenient, easy-to-view sight gauge.
  • This engine delivers maximum performance with the largest displacement in the 2.5 hp category.
  • A twist-grip throttle and 360-degree steering make it easy to use.

3.5 Four Stroke

HP @ Prop3.5
kW @ Prop2.64
Max RPM (WOT)5000-6000
Cylinder/Configuration1
Displacement (CID/cc)5.2/85
Bore & Stroke (in)2.16 x 1.42
Bore & Stroke (mm)55 x 36
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/electric spark advance
StartingManual
Gear Ratio2.15:1
Gear ShiftF-N
SteeringTiller with 360° turning
Trim Positions4
Exhaust SystemAbove prop
Lubrication SystemSplash
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity300 mL / 10 oz
Fuel Induction System2-valve single overhead cam
Integral Fuel Tank (Gal)0.3
Integral Fuel Tank (L)0.95
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)38
Dry Weight (kg.)17
Available PropellersStandard equipment
Warranty3 years
CARB Star Rating3

4 HP

4 Four Stroke Specifications

  • A standard automatic cylinder decompression system greatly reduces starting pull force for effortless starting.
  • The 4 hp model delivers ultimate portability with its integrated fuel tank and shut-off valve to prevent fuel spillage.
  • A full forward-neutral-reverse side shift is standard.

4 HP Four Stroke

HP @ Prop4
kW @ Prop2.94
Max RPM (WOT)4500-5500
Cylinder/Configuration1
Displacement (CID/cc)7.5/123
Bore & Stroke (in)2.32 x 1.77
Bore & Stroke (mm)59 x 45
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI
StartingManual
Gear Ratio2.15:1
Gear ShiftF-N-R
SteeringTiller
Alternator AmpOptional 4-amp lighting/2-amp charging
Alternator WattOptional 50-watt lighting/25-watt charging
Trim Positions6
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemPressurized wet sump
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity450 mL / 15 oz
Fuel Induction System2-valve pushrod
Integral Fuel Tank (Gal)0.39 (remote 3.2 Gal. optional)
Integral Fuel Tank (L)1.1 (remote 12L optional)
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)55
Dry Weight (kg.)25
Operator Warning SystemLow oil pressure
Overrev ProtectionStandard
Available PropellersConsult current dealer propeller guide
Warranty3 years
Corrosion Warranty3 years

5 HP

5 Four Stroke Specifications

  • A standard automatic cylinder decompression system greatly reduces starting pull force for effortless starting.
  • The 4 hp model delivers ultimate portability with its integrated fuel tank and shut-off valve to prevent fuel spillage.
  • A full forward-neutral-reverse side shift is standard.

5 Four Stroke

HP @ Prop5
kW @ Prop3.68
Max RPM (WOT)4500-5500
Cylinder/Configuration1
Displacement (CID/cc)7.5/123
Bore & Stroke (in)2.32 x 1.77
Bore & Stroke (mm)59 x 45
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/electric spark advance
StartingManual
Gear Ratio2.15:1
Gear ShiftF-N-R
SteeringTiller
Alternator AmpOptional 4-amp lighting/2-amp charging
Alternator WattOptional 50-watt lighting/25-watt charging
Trim Positions6
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemPressurized wet sump
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity450 mL / 15 oz
Fuel Induction System2-valve pushrod
Remote Fuel Tank12 L / 3.2 Gal standard
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)55
Dry Weight (kg.)25
Operator Warning SystemLow oil pressure
Overrev ProtectionStandard
Available PropellersConsult current dealer propeller guide
Warranty3 years
Corrosion Warranty3 years

6 HP

6 Four Stroke Specifications

  • A standard automatic cylinder decompression system greatly reduces starting pull force for effortless starting.
  • The 4 hp model delivers ultimate portability with its integrated fuel tank and shut-off valve to prevent fuel spillage.
  • A full forward-neutral-reverse side shift is standard.

6 HP Four Stroke

HP @ Prop6
kW @ Prop4.41
Max RPM (WOT)5000-6000
Cylinder/Configuration1
Displacement (CID/cc)7.5/123
Bore & Stroke (in)2.32 x 1.77
Bore & Stroke (mm)59 x 45
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/electric spark advance
StartingManual
Gear Ratio2.15:1
Gear ShiftF-N-R
SteeringTiller
Alternator AmpOptional 4-amp lighting/2-amp charging
Alternator WattOptional 50-watt lighting/25-watt charging
Trim Positions6
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemWet sump
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity450 mL / 15 oz
Fuel Induction System2-valve pushrod
Remote Fuel Tank12 L / 3.2 Gal standard
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)55
Dry Weight (kg.)25
Operator Warning SystemOverheat
Available PropellersConsult current dealer propeller guide
CARB Star Rating3
Warranty3 years

8 HP

8 Four Stroke Specifications

  • The multifunction tiller handle design provides one-hand operation of shifting, stopping, throttle control, tilting and steering.
  • A standard manual recoil, even on electricstart models, provides added safety in the event of a drained battery.
  • Easy starting and fast idle warm-up are provided by manual choke and primer.
  • Only 7 pounds heavier than a comparable two-stroke, it’s one of the lightest fourstrokes in its class.

8HP Four Stroke

HP @ Prop8
kW @ Prop5.88
Max RPM (WOT)5000-6000
Cylinders2 (inline)
Displacement (CID/cc)12.8/209
Bore & Stroke (in)2.16 x 1.73
Bore & Stroke (mm)55 x 44
Cooling SystemFreshwater thermostatic control
Ignition SystemCDI w/electric spark advance
StartingManual or electric
Gear Ratio2.08:1
Gear ShiftF-N-R
SteeringTiller
Alternator6 amp / 76 watt available
Trim Positions5
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemWet sump pressurized
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity800 mL / 27 oz
Fuel Induction System2-valve single overhead cam
Remote Fuel TankStandard
Remote Fuel Tank (US Gal)3.2
Remote Fuel Tank (L)12
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)84
Dry Weight (kg.)38
Operator Warning SystemLow oil pressure
Available PropellersStandard equipment
CARB Star Rating3
Warranty3 years

9.9 HP

9.9 Four Stroke Specifications

  • The multifunction tiller handle design provides one-hand operation of shifting, stopping, throttle control, tilting and steering.
  • A standard manual recoil, even on electricstart models, provides added safety in the event of a drained battery.
  • Easy starting and fast idle warm-up are provided by manual choke and primer.
  • Only 7 pounds heavier than a comparable two-stroke, it’s one of the lightest fourstrokes in its class.

9.9 HP Four Stroke

HP @ Prop9.9
kW @ Prop7.28
Max RPM (WOT)5000-6000
Cylinders2 (inline)
Displacement (CID/cc)12.8/209
Bore & Stroke (in)2.16 x 1.73
Bore & Stroke (mm)55 x 44
Cooling SystemThermostatic control
Ignition SystemCDI w/ electric spark advance
StartingManual or electric
Gear Ratio2.08:1
Gear ShiftF-N-R
SteeringRemote or tiller
Alternator6 amp / 76 watt available
Trim Positions5
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemWet sump pressurized
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity800 mL / 27 oz
Fuel Induction System2-valve single overhead cam
Remote Fuel TankStandard
Remote Fuel Tank (US Gal)3.2
Remote Fuel Tank (L)12
Shaft Length (inches)15/20/25
Shaft Length (mm)381/508/635
Dry Weight (lbs.)84
Dry Weight (kg.)38
Operator Warning SystemLow oil pressure
Available PropellersStandard equipment
CARB Star Rating3
Warranty3 years

15 HP

15 Four Stroke Specifications

  • The 15 hp FourStroke powers accessories with its reliable alternator (6-amp, 76-watt for manual-start models or 10-amp, 126-watt for electric-start models).
  • The through-prop exhaust submerges and minimizes exhaust noise.
  • Our overrev protection feature limits engine rpm if maximum engine speed is exceeded.

15 HP Four Stroke

HP @ Prop15
kW @ Prop11
Max RPM (WOT)5000 – 6000
Cylinders2 (in-line)
Displacement (CID/cc)21.4 / 351
Bore & Stroke (in)2.40 x 2.36
Bore & Stroke (mm)60 x 61
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/ electric spark advance
StartingManual or electric (with manual backup and auto-decompression)
Gear Ratio2.15:1
Gear ShiftF-N-R (shift-in-handle tiller or remote control)
SteeringTiller or remote
Alternator12V-11 Amp (optional on manual start models)
Trim & Tilt6 positions (with shallow water drive) or power tilt
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemWet sump
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity1.0 L / 1.1 Qt.
Fuel Induction System2-valve single overhead cam
Remote Fuel TankStandard
Remote Fuel Tank (US Gal)6.6
Remote Fuel Tank (L)25
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)115
Dry Weight (kg.)52
Operator Warning SystemLow oil pressure
Available Propeller9 pitch / 3-blade aluminum
CARB Star Rating3
Warranty3 years

20 HP

20 Four Stroke Specifications

  • Overhead cam provides smooth, quiet and efficient operation
  • Unique engine mount system reduces vibration
  • Accelerator pump ensures responsive acceleration
  • Meets all world wide emission requirements
  • Multi-function tiller controls shift, steering, throttle, throttle friction, trim and stop controls
  • Comes standard in 15″ and 20″ shaft lengths
  • Options include manual trim or power tilt, as well as Manual start and Electric+Manual start

20 HP Four Stroke

HP @ Prop20
kW @ Prop14.7
Max RPM (WOT)5400-6100
Cylinders2 (in-line)
Displacement (CID/cc)21.4/351
Bore & Stroke (in)2.40 x 2.36
Bore & Stroke (mm)61 x 60
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/ electric spark advance
StartingManual or electric
Gear Ratio2.15:1
Gear ShiftF-N-R (Shift-in-Handle Tiller or Remote Control)
SteeringTiller or remote
Alternator Amp12 Volt / 11 Amp
Alternator Watt139
Trim Positions6 or power tilt
Shallow Water DriveStandard
Exhaust SystemThrough prop
Lubrication SystemWet sump
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity1.0 L / 1.1 Qt.
Fuel Induction System2-valve single overhead cam
Remote Fuel TankStandard
Remote Fuel Tank (US Gal)6.6
Remote Fuel Tank (L)25
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)115
Dry Weight (kg.)52
Operator Warning SystemLow oil pressure / Over–rev
Available PropellersStandard equipment
CARB Star Rating3
Warranty3 Year Limited and 3 Year Limited Corrosion

25 HP

25 EFI Four Stroke Specifications

CONSISTENT STARTING
Mercury FourStroke EFI outboards deliver consistent, easy starts, smooth operation and reliability. The 25 and 30 hp models are the industry’s first batteryless EFI outboards.

BORN TO BE SMOOTH
All portable and mid-range Mercury FourStrokes feature INLINE DESIGNS for inherently smooth operation.

CLEAN POWER
All Mercury FourStrokes are designed to run clean, helping to protect the environment for generations to come. Every Mercury mid-range FourStroke engine carries a CARB THREE-STAR ULTRA-LOW EMISSIONS RATING.

EASY SHIFTING
PRECISION ENGINEERED SHIFT SYSTEM delivers smooth shifting for an improved driving experience.

INDUSTRY-LEADING WARRANTY
Every Mercury outboard comes with a THREE-YEAR LIMITED FACTORY-BACKED, NONDECLINING WARRANTY (except Mercury Racing models).
25 EFI Four Stroke

HP @ Prop25
kW @ Prop18.4
Max RPM (WOT)5000-6000
Cylinder/Configuration3 (in-line)
Displacement (CID/cc)32.1/526
Bore & Stroke (in)2.40 x 2.36
Bore & Stroke (mm)61 x 60
Cooling SystemWater-cooled w/thermostat
Ignition SystemCDI w/electric spark advance
StartingManual or Electric
Gear Ratio1.92:1
Gear ShiftF-N-R
SteeringTiller or remote
Alternator Amp15
Alternator Watt186
Trim SystemManual or power trim
Shallow Water DriveAvailable
Exhaust SystemThrough prop
Lubrication SystemWet sump
Recommended OilMercury 4-Stroke Outboard Oil
Oil Capacity1.8 L / 2 Qt.
Fuel Induction System2-valve single overhead cam
Remote Fuel TankStandard
Remote Fuel Tank (US Gal)6.6
Remote Fuel Tank (L)25
Shaft Length (inches)15/20
Shaft Length (mm)381/508
Dry Weight (lbs.)157
Dry Weight (kg.)71
Operator Warning SystemLow oil pressure, overrev, overheat
Available PropellersConsult current dealer propeller guide
CARB Star Rating3
Warranty3 years