COX Marine Diesel Outboards

Purpose-built diesel outboards engineered to deliver uncompromising endurance, exceptional torque, and dependable performance in the world’s most demanding marine environments.

Diesel Power Meets Outboard Freedom

Cox Marine has developed a distinctive position in marine propulsion by combining the packaging and installation flexibility of an outboard with the characteristics of a modern high-output diesel engine. Its current V8 platform is offered in 300HP and 350HP configurations, using a 4.4-litre 60-degree V8 with twin turbochargers and high-pressure common-rail fuel injection. The 300HP version produces 959 Nm of torque, while the 350HP reaches 1,052 Nm, giving these engines substantial low-speed pulling power for demanding vessels.

For Australian customers, Brisbane Marine provides a specialist sourcing route for Cox Marine propulsion, particularly where vessel range, fuel efficiency, torque, durability or commercial operating demands make diesel power attractive. The current Cox V8 is designed for recreational, commercial and government applications and carries emissions certifications including EPA Tier 3, IMO II and RCD II, with 25, 30 and 35-inch shaft options.

Explore the COX Marine Outboard Collection

* COX CXO300 Diesel Outboard

A Different Class of Outboard Propulsion

The Cox Marine V8 is engineered around the demands of high-torque marine operation rather than simply adapting a conventional automotive diesel to an outboard application. Its twin-turbocharged architecture, dedicated transmission, electronic controls and universal transom mounting arrangement are designed to provide strong acceleration, efficient cruising and installation flexibility. Cox lists the 300 V8 at 300HP and the 350 V8 at 350HP, with the engines developed for vessels ranging from recreational craft to workboats and government applications.

Brisbane Marine can investigate the appropriate Cox Marine configuration according to your vessel, operating profile and propulsion requirements. Whether you are repowering an existing vessel, specifying diesel power for a new build, requiring commercial propulsion or sourcing multiple engines, our international procurement network provides access to a specialised propulsion platform that is not commonly available through conventional outboard channels.

Frequently Asked Questions

Why choose a diesel outboard instead of gasoline?

Diesel propulsion can provide strong torque, fuel-efficiency advantages and reduced gasoline-vapor risk, making it particularly attractive for certain commercial, professional and long-range applications.

How much torque does the Cox Marine V8 produce?

The 300 V8 produces up to 959 Nm, while the 350 V8 reaches up to 1,052 Nm at the propeller.

What shaft lengths are available?

The current Cox Marine V8 is offered with 25-inch, 30-inch and 35-inch shaft options, depending on configuration.

Can Brisbane Marine source Cox Marine engines for commercial or government vessels?

Yes. Cox positions the V8 for recreational, commercial and government applications, and Brisbane Marine can investigate individual, fleet and larger procurement requirements.