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Fourstroke

Features


Fourstroke Advantage


Go Farther
Advanced Range Optimisation by Mercury Marine uses closed-loop fuel control to precisely adjust the fuel mixture and deliver the best possible efficiency.
Lighter by Design
Ounce by ounce, Mercury engineers cut kilo's from the FourStroke outboards, ensuring each engine is the lightest in its respective class.
Keep It Steady
Adaptive Speed Control maintains engine speed (rpm) regardless of load or condition changes – such as rough water, tight turns, tow sports and lower speeds on plane – without having to frequently adjust throttle position, a first for the outboard industry.
Smart Charging
Idle Charge battery-management prevents boaters from draining their batteries while operating multiple electronic devices. When battery voltage is reduced, the engine will automatically increase idle rpm to boost alternator output and recharge low batteries to the proper level.

Specifications


HP / kW
25 / 18.6
Engine type
Inline 3
Displacement (CID/CC)
32.1 / 526
Full throttle RPM
5000-6000
Fuel induction system
2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt
15 amp / 186 watt
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Low oil pressure
Over-rev
Overheat
Sensor failure
Starting
Electric (turn-key)
Manual
Steering
Remote
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
1.92:1
Dry weight *Lightest model available
157 lbs / 71 kg
Emissions Star Rating
3
Bore and stroke
2.40 x 2.36" / 61 x 60 mm
Ignition
CDI w/electronic spark advance
Fuel system
Electronic Fuel Injection (EFI)
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim system
Manual
Power Trim
Exhaust system
Through prop
Shallow water trim range (degrees)
16
Remote fuel tank standard (gal / L)
6.6 / 25
Color
Phantom Black
HP / kW
20 / 14.7
Engine type
Inline 2
Displacement (CID/CC)
20.3 / 333
Full throttle RPM
5700 - 6200
Fuel induction system
Single Overhead Cam
Alternator amp / Watt
12/145 electric
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
25W-40 Synthetic Blend
Mercury FC-W 10W-30 4-Stroke Marine Oil
Engine protection operator warning system
Low oil pressure
Over-rev
Overheat
Sensor failure
Starting
Electric
Manual
Steering
Remote
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
99 lbs / 45 kg
CARB star rating
3
Emissions Star Rating
3
Bore and stroke
2.40 x 2.24" / 61 x 57 mm
Ignition
CDI w/electronic spark advance
Fuel system
Electronic Fuel Injection (EFI)
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim system
Manual
Power Tilt
Trim positions
6
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Remote fuel tank (optional)
Yes
Remote fuel tank standard (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
15 / 11.1
Engine type
Inline 2
Displacement (CID/CC)
20.3 / 333
Full throttle RPM
5700 - 6200
Fuel induction system
2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt
12/145 electric
Recommended fuel
87 octane compatible (up to 10% ethanol)
Recommended oil
25W-40 Synthetic Blend
Mercury FC-W 10W-30 4-Stroke Marine Oil
Engine protection operator warning system
Low oil pressure
Over-rev
Overheat
Sensor failure
Starting
Electric
Manual
Steering
Remote
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
99 lbs / 45 kg
CARB star rating
3
Bore and stroke
2.40 x 2.24" / 61 x 57 mm
Ignition
CDI w/electronic spark advance
Fuel system
Electronic Fuel Injection (EFI)
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim system
Manual
Power Tilt
Trim positions
6
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Remote fuel tank (optional)
Yes
Remote fuel tank standard (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
9.9 / 7.3
Engine type
Inline 2
Displacement (CID/CC)
12.8 / 208
Full throttle RPM
5000-6000
Fuel induction system
2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt
6 amp / 76 watt
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Low oil pressure
Over-rev
Starting
Electric
Manual
Steering
Remote
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
25" / 635 mm
Gearcase ratio
2.08:1
Dry weight *Lightest model available
84 lbs / 38 kg
CARB star rating
3
Emissions Star Rating
3
Bore and stroke
2.16 x 1.73" / 55 x 44 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim positions
Ratcheting
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Integrated fuel tank (gal / L)
3.2 / 12
Remote fuel tank standard (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
8 / 5.9
Engine type
Inline 2
Displacement (CID/CC)
12.8 / 208
Full throttle RPM
5000-6000
Fuel induction system
2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt
6 amp / 76 watt
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Low oil pressure
Over-rev
Starting
Electric
Manual
Steering
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.08:1
Dry weight *Lightest model available
84 lbs / 38 kg
CARB star rating
3
Emissions Star Rating
3
Bore and stroke
2.16 x 1.73" / 55 x 44 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim positions
Ratcheting
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Integrated fuel tank (gal / L)
3.2 / 12
Remote fuel tank standard (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
6 / 4.4
Engine type
1 cylinder
Displacement (CID/CC)
7.5 / 123
Full throttle RPM
5000-6000
Fuel induction system
2-valve pushrod (overhead valve)
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Low oil pressure
Over-rev
Starting
Manual
Steering
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
57 lbs / 26 kg
CARB star rating
3
Emissions Star Rating
3
Bore and stroke
2.32 x 1.77" / 59 x 45 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim positions
6
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Integrated fuel tank (gal / L)
0.3 / 1.1
Optional fuel tank (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
5 / 3.7
Engine type
1 cylinder
Displacement (CID/CC)
7.5 / 123
Full throttle RPM
4500-5500
Fuel induction system
2-valve pushrod (overhead valve)
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Low oil pressure
Over-rev
Starting
Manual
Steering
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
57 lbs / 26 kg
CARB star rating
3
Bore and stroke
2.32 x 1.77" / 59 x 45 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim positions
6
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Integrated fuel tank (gal / L)
0.3 / 1.1
Optional fuel tank (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
4 / 2.9
Engine type
1 cylinder
Displacement (CID/CC)
7.5 / 123
Full throttle RPM
4500-5500
Fuel induction system
2-valve pushrod (overhead valve)
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Low oil pressure
Over-rev
Starting
Manual
Steering
Tiller
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
57 lbs / 26 kg
CARB star rating
3
Bore and stroke
2.32 x 1.77" / 59 x 45 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N-R
Gearcase options
Standard
Trim positions
6
Exhaust system
Through prop
Shallow water drive
Yes
Shallow water trim range (degrees)
16
Integrated fuel tank (gal / L)
0.3 / 1.1
Optional fuel tank (gal / L)
3.2 / 12
Color
Phantom Black
HP / kW
3.5 / 2.6
Engine type
1 cylinder
Displacement (CID/CC)
5.2 / 85
Full throttle RPM
5000-6000
Fuel induction system
2-valve pushrod (overhead valve)
Recommended fuel
87 octane / up to 10% ethanol
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Over-rev
Starting
Manual
Steering
Tiller with 360° turning
Shaft length
15" / 381 mm
20" / 508 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
41 lbs / 18 kg
CARB star rating
3
Emissions Star Rating
3
Bore and stroke
2.16 x 1.42" / 55 x 36 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N
Gearcase options
Standard
Trim system
4 position
Trim positions
4
Exhaust system
Above prop
Shallow water trim range (degrees)
16
Integrated fuel tank (gal / L)
0.3 / 1.1
Color
Phantom Black
HP / kW
2.5 / 1.9
Engine type
1 cylinder
Displacement (CID/CC)
5.2 / 85
Full throttle RPM
4500-5500
Fuel induction system
2-valve pushrod (overhead valve)
Recommended fuel
87 octane compatible (up to 10% ethanol)
Recommended oil
Mercury FourStroke Oil 10W-30
Engine protection operator warning system
Over-rev
Starting
Manual
Steering
Tiller with 360° turning
Shaft length
15" / 381 mm
Gearcase ratio
2.15:1
Dry weight *Lightest model available
41 lbs / 18 kg
CARB star rating
3
Emissions Star Rating
3
Bore and stroke
2.16 x 1.42" / 55 x 36 mm
Ignition
CDI w/electronic spark advance
Fuel system
Carbureted
Cooling system
Water-cooled with thermostat
Gear shift
F-N
Gearcase options
Standard
Trim system
4 position
Trim positions
4
Exhaust system
Above prop
Shallow water trim range (degrees)
16
Color
Phantom Black