The 300 hp diesel outboard that redefines standards

CXO300 from innovative Cox Powertrain is a high powered V8 diesel outboard engine designed specifically for commercial and recreational use.

Outstanding performance

The 300 hp engine delivers high torque at low revs, giving the boat outstanding performance and manoeuvrability. Moreover, this commercial rated diesel outboard promises 25% better fuel efficiency, lower maintenance cost and three times longer service intervals compared to petrol-powered outboards. It runs quietly, with minimal noise or vibration.

The CXO300 is primarily suitable for planing boats in transport, governmental agencies, maritime rescue, and professional duties as well as for larger leisure boats / yachts.

CXO300 Spec

Engine Designation	CXO300
Propeller shaft power, kW (hp)	224 (300)
Engine propping speed, rpm	3700-4000
Displacement, L (cu.in.)	4.4 (266)
Weight, kg (lb)	393 (866)
Number of cylinders	8
Bore/stroke, mm (in.)	84 (3.3) / 98.5 (3.9)
Compression ratio	16:1
Ratio 1 (Propeller speed)	1.23:1 (3259)
Ratio 2 (Propeller speed)	1.46:1 (2739)
Peak torque, Nm (ft.lb)	650 (479)
Aspiration	Twin-turbo
Shaft Length, inch(mm)	25”(635) / 30”(762) / 35”(889)
Emission compliance	EPA 3, IMO 2, RCD 2
Rating	Light-duty commercial
Trim range	-4° to +16°
Tilt range	71°
Gear Oil Spec	SAE 80W90, API GL-5
Powerhead Oil Spec	Min standard – fully synthetic API CI-4/ SAE 10W40 or 5W40
Propeller spline spec	1.25” shaft / 19 tooth
Colour options	Black / White

Technical Description

Engine block and head

60 degree V8
Aluminium alloy block, heads and ladder frame
Quad camshafts, four valves per cylinder

Engine mounting

Standard outboard fitting layout
6-bolt mounting with multi-hole adjustment
30″ transom spacing (28.5″ with steering limits)

Fuel system

Electronically controlled high-pressure common rail injection
On-engine fuel filtration and cooling

Air inlet and exhaust system

Twin turbochargers with electronic boost control
Water-to-air charge cooling
Air filters with replaceable inserts

Transmission

90-degree spiral bevel gear drive
All outboard offer standard and counter rotating capability, programmable through the ECU

Cooling system

Thermostatically regulated raw water cooling
Solid impeller low-maintenance water pump

Oil system

Closed crankcase ventilation

Electric system

Drive-by-wire power and shift control
12V electrical system
100A flywheel-integrated marine alternator
Automatic integrated fuses

Propeller

Maximum propeller diameter 16″
19 tooth 1.25″ propeller spline

Instruments/control

Seastar electronic throttle
Seastar joystick
Coastkey Keyless key fob / wireless MOB technology
Compatible with NMEA 2000
Murphy Powerview displays – 4.8”/7”/10”/12” screen sizes
Compatible with all Seastar EPS steering

CHOOSE YOUR CXO300

Retrofit compatibility

Although the first of its kind, the CXO300 has been built for purpose and developed according to industry standards. This means it is compatible with current controls (NMEA 2000), propellers, transom bolt pattern and steering systems. It is as easy to install and handle as any petrol outboard.

Sign up for a ride

Get ready to test drive the diesel outboard CXO300

Your local distributor

Diesel Power is Official Distributor of Cox Powertrain for Austria, Czech Republic, Estonia, Finland, Germany, Hungary, Latvia, Lithuania, Poland, Slovakia & Sweden.