Monday, July 22, 2024


Model: 320 HP


Product Specification Listing: MERCRUISER QSD4.2-320 LC - 320 HP Marine Engine

General Information

  • Product Name: MERCRUISER QSD4.2-320 LC
  • Manufacturer: Mercury Marine
  • Engine Type: Inboard Marine Diesel Engine

Technical Specifications

  • Engine Model: QSD4.2-320 LC
  • Horsepower: 320 HP (235 kW)
  • Displacement: 4.2 Liters
  • Configuration: V6
  • Operation Cycle: 4-Stroke
  • Aspiration: Turbocharged with Aftercooler
  • Cooling System: Closed-Loop Cooling System
  • Fuel System: Common Rail Direct Injection
  • Emission Compliance: Meets EPA and CARB emissions standards


  • Maximum RPM: 3800 RPM
  • Torque: Approx. 678 Nm (500 ft-lb) @ 3000 RPM
  • Fuel Type: Diesel
  • Fuel Consumption: Varies with load and conditions

Dimensions and Weight

  • Length: 987 mm (38.9 inches)
  • Width: 780 mm (30.7 inches)
  • Height: 763 mm (30 inches)
  • Dry Weight: Approx. 484 kg (1067 lbs)


  • Engine Management System: SmartCraft Digital Throttle & Shift (DTS)
  • Controls: Digital and Analog Controls
  • Instrumentation: Integrated Engine Health Monitoring
  • Propulsion System: Compatible with Bravo Three X Drive

Additional Features

  • Advanced Engine Protection: Low Oil Pressure, Overheat Protection, Loss of Coolant, and Over-Speed Protection
  • Vibration Dampening: Optimized for reduced vibration and noise
  • Electrical System: 12V

Installation Requirements

  • Engine Mounting: Requires standard mounts (check installation manual for specifics)
  • Exhaust System: Wet exhaust system recommended
  • Fuel Lines: High-pressure fuel lines compatible with diesel
  • Cooling Requirements: Heat exchanger and raw water intake


  • Service Intervals: Refer to the owner’s manual for detailed maintenance schedules
  • Warranty: Typically comes with a 2-3 year limited warranty (check regional details)


  • Suitable for: Pleasure Boats, Yachts, Light Commercial Vessels

Dealer Information

  • For purchases, availability, and service, contact your local authorized Mercury Marine dealer or visit the Mercury Marine website.

Note: Please refer to the official Mercruiser QSD4.2-320 LC operation and installation manual for comprehensive details and specific installation instructions. Specs provided are for reference and may vary based on production year and region-specific regulations.

[Product Type: Engine]

Product Specifications

Strokein 3.94 in
Stroke 100 mm (3.94in)
Rated Speed 3800 r/min
Powerkw 235 kW
Power 320 HP (238.59kw)
Displacementin3 254 in3
Displacement 4.2 cm3 (0.00L, 0.26in3)
Cylinders Arrangement/Number 6
Borein 3.70 in
Bore 94 mm (3.70in)