CXO300 Interior


The CXO300 is a world first. After 10 years of engineering development, the outcome is the most powerful diesel outboard ever to come to the marine market. This 4-stroke V8 300hp engine has the power and torque of a diesel inboard with the advantages of an outboard.

CXO300 Technical data

Engine Designation CXO300
Crankshaft power, kW (hp) 252 (338)
Propeller shaft power, kW (hp) 224 (300)
Engine propping speed, rpm 3700-4000
Displacement, L ( 4.4 (266)
Number of cylinders 8
Bore/stroke, mm (in.) 84 (3.3) / 98.5 (3.9)
Compression ratio 16
Weight, kg (lb) 375 (826)
Ratio 1 (Propeller speed) 1.23:1 (3259)
Ratio 2 (Propeller speed) 1.46:1 (2739)
Peak torque, Nm (lb.ft) 650 (479)
Aspiration Twin-turbo
Shaft Length, inch(mm) 25”(635)/30”(762)/35”(889)
Emission compliance EPA 3, IMO 2, RCD 2
Start assist Glow plugs
Rating Light-duty commercial
Trim range -4° to +16°
Tilt range 71°
Engine Oil Spec API CI-4 / SAE 5W40
Gear Oil Spec API GL-5 / SAE 75W140
Propeller spline spec 1.25” shaft / 19 tooth
Colour options Black / White

Technical description

Engine block and head

  • Aluminium alloy block and heads
  • 60 degree V8

Engine mounting

  • Standard outboard fitting layout
  • 6-bolt mounting with multi-hole adjustment

Fuel system

  • High pressure common rail fuel injection
  • Fine filter with water separator

Air inlet and exhaust system

  • Twin turbochargers
  • Air filters with replaceable inserts
  • Closed crankcase ventilation


  • All outboards offer standard and counter rotating capability, programmable through the ECU

Cooling system

  • Thermostatically regulated raw water cooling
  • Tubular heat exchanger

Electric system

  • 12V/24V two-pole electrical system
  • 100A marine alternator


  • Electronic controls
  • Joystick to manage up to 6 engines
  • Keyless key fob
  • Wireless MOB and Key
  • NMEA 2000 CAN displays and controls
  • 4.8”/7”/10”/12” screen sizes
  • Compatible with the off the shelf Seastar and Ultraflex steering units, and 19t 1.25 propeller hub kits

Choose your CXO300

View our brochure