2.5-60hp

Starting reliability with gutsy performance

The secret to our mid-range is our renowned reliability thanks to its cool running. With high volume, low pressure, floppy-vane water impellers keeping operating conditions down.

Engine Information and Specifications

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40 Super 30 25 15 9.9 9.9 LW 8 5 4 3.3 2.5

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Engine Details

Electric CDI ignition delivers high voltage for quick, sure starts and added fuel efficiency. Innovative sound attenuator helps absorb engine sounds before they can reach the ear, resulting in a quieter running engine on the TwoStroke 40 hp and higher models.

Specifications - 40 Super

HP / kW	40 / 29.8
Displacement (CID/CC)	42.5 / 697
Cylinder Configuration	I-3
Full throttle RPM	5000 - 5700
Fuel induction system	Loop-charged (3 carb)
Starting	Electric Manual
Steering	Remote Tiller
Shaft length	20" / 508 mm
Gearcase ratio	1.85 : 1
Dry weight *Lightest model available	72 kg
Emissions Star Rating	1
Bore and stroke	68 x 64
Trim system	4 position Manual Power Trim
Oil Injection	Pre-mix Standard

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Engine Details

The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.

Specifications - 30

HP / kW	30 / 22.5
Displacement (CID/CC)	26.3 / 430
Cylinder Configuration	I-2
Full throttle RPM	4750-5500
Fuel induction system	Loop-charged (1 carb)
Starting	Electric Manual
Steering	Remote Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	1.92:1
Dry weight *Lightest model available	51 kg
Emissions Star Rating	1
Bore and stroke	68 x 59 mm
Trim positions	5
Oil Injection	Pre-mix

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Specifications - 25

HP / kW	25 / 18.4
Displacement (CID/CC)	26.3 / 430
Cylinder Configuration	I-2
Full throttle RPM	5000-6000
Fuel induction system	Loop-charged (1 carb)
Starting	Electric Manual
Steering	Remote Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	1.92 : 1
Dry weight *Lightest model available	51 kg
Bore and stroke	68 x 59
Trim positions	5
Oil Injection	Pre-mix

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Engine Details

The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.

Specifications - 15

HP / kW	15 / 11.2
Displacement (CID/CC)	16 / 262
Cylinder Configuration	I-2
Full throttle RPM	5000 - 6000
Fuel induction system	Cross flow (1 carb)
Starting	Electric Manual
Steering	Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	2.00 : 1
Dry weight *Lightest model available	35 kg
Bore and stroke	60 x 46
Trim positions	6
Oil Injection	Pre-mix

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Engine Details

The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.

Specifications - 9.9

HP / kW	9.9 / 7.2
Engine type	Inline 2
Displacement (CID/CC)	10.3 / 169
Full throttle RPM	5000 - 6000
Fuel induction system	Loop-charged (1 carb)
Recommended fuel	Pre-Mix 50:1
Recommended oil	2-Cycle TC-W3
Starting	Electric Manual
Steering	Remote Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	2.08 : 1
Dry weight *Lightest model available	26 kg
Bore and stroke	50mm x 43mm
Ignition	CDI w/electronic spark advance
Fuel system	Carbureted
Cooling system	Water-cooled with thermostat
Gear shift	F-N-R
Trim system	6 position Manual
Exhaust system	Through prop
Shallow water trim range (degrees)	20
Remote fuel tank standard (gal / L)	3.2 / 12
Color	Phantom Black
Lubrication system	Pre-Mix
Oil Injection	Pre-mix

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Specifications - 9.9 LW

HP / kW	9.9 / 7.2
Displacement (CID/CC)	10.3 / 169
Cylinder Configuration	I-2
Full throttle RPM	5000 - 6000
Fuel induction system	Loop-charged (1 carb)
Recommended fuel	Pre-Mix 50:1
Recommended oil	2-Cycle TC-W3
Starting	Electric Manual
Steering	Remote Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	2.08 : 1
Dry weight *Lightest model available	26 kg
Bore and stroke	50mm x 43mm
Ignition	CDI w/electronic spark advance
Fuel system	Carbureted
Cooling system	Water-cooled with thermostat
Gear shift	F-N-R
Trim system	6 position Manual
Exhaust system	Through prop
Shallow water trim range (degrees)	20
Remote fuel tank standard (gal / L)	3.2 / 12
Color	Phantom Black
Lubrication system	Pre-Mix
Oil Injection	Pre-mix

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Engine Details

8 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

Specifications - 8

HP / kW	8 / 6
Displacement (CID/CC)	10.3 / 169
Cylinder Configuration	I-2
Full throttle RPM	4500 - 5500
Fuel induction system	Loop-charged (1 carb)
Starting	Manual
Steering	Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	2.08 : 1
Dry weight *Lightest model available	26 kg
Bore and stroke	50mm x 43mm
Trim positions	6
Oil Injection	Pre-mix

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Engine Details

5hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

Specifications - 5

HP / kW	5 / 3.7
Displacement (CID/CC)	6.2 / 102
Cylinder Configuration	1
Full throttle RPM	4000 - 5000
Fuel induction system	Loop-charged (1 carb)
Starting	Manual
Steering	Tiller
Shaft length	15" / 381 mm 20" / 508 mm
Gearcase ratio	2.15 : 1
Dry weight *Lightest model available	20 kg
Bore and stroke	55 x 43
Trim positions	6
Oil Injection	Pre-mix

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Engine Details

4 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

Specifications - 4

HP / kW	4 / 3
Displacement (CID/CC)	6.2 / 102
Cylinder Configuration	1
Full throttle RPM	4500 - 5500
Fuel induction system	Loop-charged (1 carb)
Starting	Manual
Steering	Tiller
Shaft length	15" / 381 mm
Gearcase ratio	2.15 : 1
Dry weight *Lightest model available	20 kg
Bore and stroke	55 x 43
Trim positions	6
Oil Injection	Pre-mix

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Specifications - 3.3

HP / kW	3.3 / 2.5
Displacement (CID/CC)	4.6 / 74.6
Cylinder Configuration	1
Full throttle RPM	4500 - 5500
Fuel induction system	Loop-charged (1 carb)
Starting	Manual
Steering	Tiller with 360° turning
Shaft length	15" / 381 mm
Gearcase ratio	2.15 : 1
Dry weight *Lightest model available	13 kg
Bore and stroke	47 x 43
Trim system	4 position
Trim positions	4
Oil Injection	Pre-mix

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Engine Details

The simple TwoStroke design creates an engine that is less complex and lighter, with automatic low oil level warning for an added peace of mind.

Specifications - 2.5

HP / kW	2.5 / 1.9
Displacement (CID/CC)	4.6 / 74.6
Cylinder Configuration	1
Full throttle RPM	4200 - 5200
Starting	Manual
Steering	Tiller with 360° turning
Shaft length	15" / 381 mm
Gearcase ratio	1.85 : 1
Dry weight *Lightest model available	41 lbs / 18 kg
Bore and stroke	47 x 43
Trim system	4 position
Trim positions	4
Oil Injection	Pre-mix

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Proven Reliability

Mercury's proven TwoStroke engines deliver easy starting, gutsy performance, and great all-round reliability. Across the range you’ll find an array of features that help keep your boating experiences more enjoyable and trouble-free. Features such as largest engine capacity displacement, giving you more low-end thrust, advanced carburetor design and fully-regulated, high output alternators powering all your marine electronics will ensure absolute boating excellence.

The ideal power companion

The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.