Mercury® Diesel
4.2L (270-350hp)

Durable and Powerful

Designed for sterndrive and inboard applications.

See All Models and Specs

Quiet Ride.

Quiet Ride.

The high-pressure common-rail fuel-injection system not only ensures fuel economy, it also minimises Noise, Vibration and Harshness (NVH), along with smoke and odor – the undesirable factors many boaters associate with yesterday’s diesels.

Repower Reasons.

Repower Reasons.

The lightweight, compact design of these diesel engines makes them ideal drop-in replacement power packages for many older, fuel-guzzling petrol engines. Mercury’s full range of drives offers outstanding versatility to owners of sterndrive-powered boats.

Peak Performance.

Peak Performance.

Impressive acceleration and quick throttle response are delivered by the proven common-rail fuel system, which incorporates a turbocharger and seawater after-cooler. These engines combine smooth performance with key diesel advantages, such as high torque and optimum fuel economy.

Intuitive Design.

Intuitive Design.

A sophisticated Control Module and Mercury SmartCraft compatibility provide complete control over key engine functions. SmartCraft Digital Throttle & Shift (DTS) offers smooth shifting, immediate throttle response and high-tech digital controls.

Corrosion-Resistance.

Corrosion-Resistance.

Mercury diesels feature state-of-the-art anti-corrosion, including a thermostatically controlled closed water-cooled system. Water-cooled engine oil, gear oil and steering fluid decrease engine-room temperatures, extending engine life. The SeaCore® system is available for the ultimate in saltwater protection.

Specifications

Mercury® Diesel: 4.2L (270-350hp)

  • Power mhp / kW
    • 350 / 257
    Bore and stroke
    • 3.70 x 3.94" / 94 x 100 mm
    Maximum RPM (WOT)
    • 3800
    Engine type
    • Inline 6
    Displacement (L)
    • 4.2
    Dry Weight (engine only)
    Dimensions (L x W x H)
    • 42 x 30 x 31" / 1077 x 773 x 790 mm
    Peak Torque
    Air Handling
    Fuel System
    Rotation
    Compression Ratio
    Fuel Pre-filtration requirement
    Fuel lift pump
    High pressure fuel pump
    Valves per Cylinder
    Pistons
    Fuel injectors
    Glow Plugs
    Air inlet (Starboard Rear)
    Turbocharger
    Engine and turbocharger cooling
    Coolers
    Seawater pump inlet size
    Oil sump volume
    Dipstick range
    Oil maintenance interval
    Coolant Volume
    Flywheel size
    Electrical system
    MerCathode (Sterndrive only)
    Engine Stop
    Engine Control Unit (ECU)
    Sensors
    Throttle and shift
    Helm and gauge compatibility
    Mercury Joystick Piloting
    Sterndrive: Mercury Bravo One X
    Sterndrive: Mercury Bravo One X SeaCore
    Sterndrive: Mercury Bravo One XR
    Sterndrive: Mercury Bravo Two X
    Sterndrive: Mercury Bravo Two X SeaCore
    Sterndrive: Mercury Bravo Two XR
    Sterndrive: Mercury Bravo Three X
    Sterndrive: Mercury Bravo Three X SeaCore
    Sterndrive: Mercury Bravo Three XR
    Sterndrive: Mercury Bravo Three XR SeaCore
    Inboard: ZF 63A
    Inboard: ZF 63
    Inboard: ZF 68IV
    Inboard: ZF 45C
    Transmission and Ratio
    Cylinder Configuration
    Dry weight *Lightest model available
    Direction of Rotation
    Commercial Rating
    Emission Certification
    Rated rpm
    Max Torque in N-m (ft-lb) at rpm
    Engine Cooling
    Turbo Cooling
    Flywheel Housing
    Bobtail Length (mm)
    Bobtail Width (mm)
    Bobtail Height (mm)
    Inboard: ZF 85IV
    Inboard: ZF 220
    Inboard: ZF 220A
    Inboard: ZF 280IV
    Inboard: ZF 280-1
    Inboard: ZF 280-1A
    Inboard: ZF 45A
    Mercury Zeus Pod
    Mercury Zeus Pod
    Sterndrive - Primary
    Sterndrive - Optional
    Test alternator amp / watt
    Weight (engine only)
    • 1014 lbs / 460 kg
    Weight (incl. transmission)
    • 1111 lbs / 504 kg
    Weight - Alpha
    Weight - Bravo One
    Weight - Bravo Two
    Weight - Bravo Three
    • 1272 lbs / 577 kg
    Cooling system
    • Closed cooling
    Fuel consumption
    • 21.5 gal/hr / 81.46 l/hr @ 3800 rpm
    Compatible drives
    • Bravo Three
    Emission
    • EPA Tier 2 IMO RCD BSO/SAV certified
    Compatible with SmartCraft digital technology
    Print Compare With Other Products Request a Quote
  • Power mhp / kW
    • 320 / 235
    Bore and stroke
    • 3.70 x 3.94" / 94 x 100 mm
    Maximum RPM (WOT)
    • 3800
    Engine type
    • Inline 6
    Displacement (L)
    • 4.2
    Dimensions (L x W x H)
    • 42 x 30 x 31" / 1077 x 773 x 790 mm
    Weight (engine only)
    • 1014 lbs / 460 kg
    Weight (incl. transmission)
    • 1111 lbs / 504 kg
    Weight - Bravo One
    • 1246 lbs / 565 kg
    Weight - Bravo Two
    • 1261 lbs / 572 kg
    Weight - Bravo Three
    • 1272 lbs / 577 kg
    Cooling system
    • Closed cooling
    Fuel consumption
    • 19.0 gal/hr / 71.96 l/hr @ 3800 rpm
    Compatible drives
    • Bravo One
    • Bravo Three
    • Bravo Two
    Emission
    • EPA Tier 2 IMO RCD BSO/SAV certified
    Print Compare With Other Products Request a Quote
  • Power mhp / kW
    • 270 / 199
    Bore and stroke
    • 3.70 x 3.94" / 94 x 100 mm
    Maximum RPM (WOT)
    • 3800
    Engine type
    • Inline 6
    Displacement (L)
    • 4.2
    Dimensions (L x W x H)
    • 42 x 30 x 31" / 1077 x 773 x 790 mm
    Weight (engine only)
    • 1014 lbs / 460 kg
    Weight (incl. transmission)
    • 1111 lbs / 504 kg
    Weight - Bravo One
    • 1246 lbs / 565 kg
    Weight - Bravo Two
    • 1261 lbs / 572 kg
    Weight - Bravo Three
    • 1272 lbs / 577 kg
    Cooling system
    • Closed cooling
    Fuel consumption
    • 16.0 gal/hr / 60.66 l/hr @ 3800 rpm
    Compatible drives
    • Bravo One
    • Bravo Three
    • Bravo Two
    Emission
    • EPA Tier 2 IMO RCD BSO/SAV certified
    Print Compare With Other Products Request a Quote
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