All the benefits of diesel.
None of the compromise.
The CXO300 diesel outboard engine truly breaks new ground, delivering the same uncompromising power, performance, and durability you’d normally only associate with a diesel inboard engine.
At the same time, it offers all the convenience and flexibility of an outboards and is similar in size and weight to petrol alternatives, as well as more efficient. Which means it is designed to be compliant with the toughest emissions standards in the world including IMO, EPA and EU emissions levels.
Channeling best-in-class automotive manufacturing and the latest in intelligent tooling and scanning, the CXO300 diesel outboard engine sets the standard for world-leading quality and robustness. This fusion drives us forward in a relentless pursuit of revolutionary technology.
THE NEW STANDARDS
Our service and support meet the same uncompromisingly high standards as our engineering and performance. The CXO300 comes with a 1,500 hour warranty as standard, with an optional service package also available.
COX 300 HP: DESIGNED AND BUILT IN BRITAIN
The use of highly refined, modern automotive-based engine technology significantly reduces the fuel consumption and provides for industry leading emission levels and subsequent minimized impact on the environment. The emission levels are approved by EPA TIER III, IMO TIER II (MARPOL VI TIER 2) and RCD.
Diesel is a less flammable fuel and therefore safer to work with in hazardous environments. Robust design and quick shift capability leads to safe operation in fierce conditions. The COX Diesel is designed to be safe in any environment.
Due to significantly lower fuel consumption than a comparable modern outboard the COX Diesel offers the market an unprecedented range. Enabling users to go further and refilling from other vessels or marine based platform.
Crankshaft power, kW (hp)
Propeller shaft power, kW (hp)
Engine propping speed
Weight, kg (lb)
Number of cylinders
Bore/stroke, mm (in.)
Ratio 1 (Propeller speed)
Ratio 2 (Propeller speed)
Peak torque, Nm (ft.lb)
Shaft Length, inch(mm)
Engine Oil Spec
Gear Oil Spec
Propeller spline spec
L (cu.in.)4.4 (266)
84 (3.3) / 98.5 (3.9)
25”(635) / 30”(762) / 35”(889)
EPA 3, IMO 2, RCD 2
Glow plugs (optional)
-4° to +16°
API CJ-4 / SAE 10W40
API GL-5 / SAE 80W90
1.25” shaft / 19 tooth
Black / White
COX DIESEL OUTBOARD?
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Although the first of its kind, as the most powerful diesel outboard brought to the market, the CXO300 has been developed to be compatible with existing industry standards – making it as easy to install on a wide range of vessels as any gasoline outboard.
All outboards offer standard and counter rotating capability, programmable through the ECU
Thermostatically regulated raw water cooling
Tubular heat exchanger
Seastar electronic throttle
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
Engine block and head
Aluminium alloy block and heads
60 degree V8
Standard outboard fitting layout
6-bolt mounting with multi-hole adjustment
High pressure common rail fuel injection
Fine filter with water separator
Air inlet and exhaust system
Air filters with replaceable inserts
Closed crankcase ventilation
12V electrical system
100A marine alternator