Mercury’s stunning new 135 FourStroke

Mercury 150Mercury Marine has added another category-leading engine to its range, with the release of its new 135hp FourStroke EFI outboard.


Designed to provide reliability and durability, no matter what is thrown at it, Mercury’s new compact 135hp FourStroke also delivers boat lovers tremendous performance and outstanding fuel efficiency.


“We’ve developed this model specifically from the feedback given to us by Australian and New Zealand consumers and dealers,” said Nicholas Webb, Director of Engines and Marketing, Mercury Marine ANZP.


“They love our latest generation high cubic capacity, low weight FourStrokes and wanted the same technology to fit to 135 and 140hp rated boat transoms. It’s exciting just how competitive this model is, with its 3.0 litre capacity going competitor Four Strokes at just 1.8L or 2.0L. Customers are definitely going to be impressed by the refinement and performance characteristics of this engine. It’s every bit as good as its FourStroke siblings.”


The compact 135hp FourStroke EFI has a 3.0-litre, 4-cylinder in-line configuration, is low weight, has fewer moving parts, and has been designed to be incredibly reliable and durable – ready, willing and able to handle work in any conditions.


  • Its 4.9 inch (12.5cm) gearcase housing is built to handle higher horsepower, but thanks to its ultra-efficient hydrodynamics this larger housing doesn’t increase drag.
  • Maintenance free valve train for life.
  • Its focus mount system, which situates the mounts farther from the powerhead, significantly reduces mount temperature and significantly increases mount durability.
  • Its lightweight thermo-bonded top cowl provides for long-life, a watertight seal and easy access.
  • A high grade steel is used to produce its balance shaft gears.


Of course, like many of Mercury’s latest FourStroke models, the new 135hp FourStroke EFI can be rigged with the full suite of Mercury SmartCraft gauges and Mercury’s innovative BigTiller system.


“Like the 150 before it, this is an engine which has it all – reliability, smooth operation, a great torque curve, low weight, compact size and excellent fuel economy,” said Nicholas.



Mercury Marine 135hp FourStroke EFI

Engine type                                                  Inline 4

Displacement (L)                                        3.0

Full throttle RPM                                        4800-5300

Fuel induction system                               Computer controlled Sequential Multi-Port Electronic Fuel Injection (EFI)

Alternator amp / Watt                               60 amp / 756 watt (Belt-Driven)

Recommended fuel                                   Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum

Recommended oil                                      Mercury FourStroke Oil 10W-30

Engine protection                                       SmartCraft Engine Guardian

SmartCraft compatible                               Yes

Starting                                                          Electric (turn-key)

Steering                                                         Big Tiller Compatible. Electro-Hydraulic Power Steering Optional on Duals. Hydraulic power steering. Mercury power steering. Remote.

Shaft length                                                  L       (20″/508 mm)

XL   (25″/635 mm)

CXL                   (25”/635 mm) Counter Rotator

Gearcase ratio                                             1.92:1

Dry weight * (lightest model)                  455 lbs / 206 kg

Bore and stroke                                          4.0 x 3.6″ / 102 x 92 mm

Ignition                                                          SmartCraft ECM 70 Digital Inductive

Fuel system                                                  Electronic Fuel Injection (EFI)

Cooling system                                            Water-cooled with thermostat

Gear shift                                                      F-N-R

Gearcase options                                       Standard

Trim system                                                  Power trim and tilt with SmartCraft programmable tilt

Counter rotation                                         Available

Colour                                                            Phantom Black

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