2019 Mercury 3.0L 230HP

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3.0L 230HP



Powerful and Compact

Redefining the standard in a powerful, compact and easy-to-service package

  • Easy-to-Maintain: Mercury Diesel’s 3.0L engine simplifies maintenance by locating service points at the front of the engine. The oil, coolant, fuse box, seawater strainer, drive lube (sterndrive only) and power steering fluid (sterndrive only) service points are located at the front of the engine next to Mercury’s color-coded maintenance schedule to provide easy-to-understand service guidelines and easy-to-reach access.
  • Redefining the Standard: The new Mercury Diesel 3.0L common-rail high-speed engine delivers exceptional performance and offers substantial improvements in acceleration and top speed – all made possible by a new water-cooled variable geometry turbocharger design (VGT). This matched system, plus a state-of-the-art engine control system, provides reduced time to plane and outstanding overall performance.
  • Reliability + Performance: Enjoying your time on the water is more easily achieved with an engine that performs day in and day out. Mercury Diesel’s 3.0L engine is assembled in a state-of-the-art manufacturing facility that employs the latest in quality practices and control, ensuring ultimate confidence in reliability. Combine the reliability and performance of the Mercury Diesel 3.0L with Mercury’s proprietary SmartCraft system and a full suite of accessories that contribute to an unsurpassed boating experience.
  • Quiet Performer: The Mercury Diesel 3.0L delivers exhilarating performance while minimizing noise and vibration, while the air filter doubles as a silencer that removes the turbo whine historically associated with diesel engines. The motor mounts are designed to minimize vibration. Having a conversation while cruising has never been easier.
  • Joystick Piloting for Inboards: The only joystick piloting system that’s compatible with gasoline or diesel inboard and tow sport engines. The only joystick piloting system for single-inboard boats. Many features available to make your tow sport adventures even more amazing!
  • 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.
  • Power mhp / kW: 230
  • Bore and stroke: 3.27 x 6.62" / 83 x 92 mm
  • Maximum RPM (WOT): 4200
  • Engine type: V-6
  • Displacement (L): 3.0L
  • Dry Weight (engine only): 348 Kg (767 lbs)
  • Dimensions (L x W x H): 36.6 x 33.5 x 30.0" / 931 x 851 x 784 mm
  • Peak Torque: 503 Nm @ 2200 rpm
  • Air Handling: Turbocharged and Aftercooled
  • Fuel System: High pressure common rail
  • Rotation: Counter clockwise facing flywheel
  • Compression Ratio: 16.5:1
  • Fuel Pre-filtration requirement: Not required
  • Fuel lift pump: On engine
  • High pressure fuel pump: Bosch CP 4.2 w/ integrated gear lift pump
  • Valves per Cylinder: 4
  • Pistons: Oil jet cooled
  • Fuel injectors: Bosch CRS 2.20 (Solenoid)
  • Glow Plugs: Standard equipment with Bosch glow plug control unit (GCU)
  • Air inlet (Starboard Rear): Filtered and silenced
  • Turbocharger: Honeywell VGT
  • Engine and turbocharger cooling: Closed cooled
  • Coolers: Aftercooler, Engine Coolant, Engine Oil, Power Steering / Gear Oil and Fuel - All are tube and shell
  • Seawater pump inlet size: 38 mm (1.5 in)
  • Oil sump volume: 8.5 L
  • Dipstick range: 1.0 L
  • Oil maintenance interval: 200 hours or annually
  • Coolant Volume: 12 L
  • Flywheel size: 290 mm (11.42 in) SAE 8
  • Electrical system: 12 V, 110 A w/ conveniently located battery power and ground studs
  • Engine Stop: ECU Controlled
  • Engine Control Unit (ECU): Bosch EDC17
  • Sensors: Crank & cam position, intake manifold pressure/temp, compressor outlet temp, exhaust gas temp, fuel temp, rail pressure, water in fuel (WIF), oil pressure/temp, coolant temp, seawater pressure/temp, atmospheric pressure
  • Throttle and shift: Mercury DTS or Mechanical Cable
  • Helm and gauge compatibility: Mercury SmartCraft
  • Mercury Joystick Piloting: Compatible with Joystick Piloting for Inboards
  • Inboard: ZF 63A: 1.21, 1.56, 2.03, 2.52, 2.68
  • Inboard: ZF 63: 1.25, 1.75, 2.78
  • Inboard: ZF 68IV: 1.29, 1.56, 1.99
  • Inboard: ZF 45C: 1



Engine Type
230 mhp
Bore x Stroke
3.27 x 6.62 in. (83 x 92 mm)
Compression Ratio


36.6 in. (931 mm)
33.5 in. (851 mm)
30.0 in. (784 mm)
767 lb. (348 kg)


Full Throttle Operating Range
4200 rpm


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