Delivering world-class outboards for safer and cleaner seas.
Pioneering the future of safe, sustainable, and dependable marine propulsion.
Who is Cox Marine?
Cox Marine is a British marine technology company dedicated to pioneering a safer, cleaner and more efficient approach to boat propulsion. Founded over a decade ago, we set out to challenge conventional thinking by designing and manufacturing diesel outboard engines from the ground up, creating purpose-built marine powerplants offering unrivalled performance and safety.
At our facility in Shoreham-by-Sea, our group of specialists collaborate across engineering, production and testing to deliver the Cox Marine V8: the world’s most powerful diesel outboard. By combining twin-turbo performance with high-pressure fuel injection, advanced cooling and robust corrosion protection, we achieve class-leading torque, fuel efficiency and emissions compliance – giving operators the confidence to tackle the toughest marine applications.
Today, Cox Marine supports customers in commercial, governmental and recreational sectors around the world. Backed by a network of local distributors and service partners, we provide regional expertise, fast response and genuine technical support. Guided by our values of building trust, taking ownership, working together, speaking up, empowering each other, and caring, we are committed to unlocking potential on the water and powering the future of marine propulsion.
Our story so far
“There has to be a better way” – that belief inspired the founding of Cox Marine and set us on a pioneering journey to develop a lightweight diesel outboard that would not force anyone to compromise on performance, safety or efficiency. With the launch of our first product, the 300 V8 – a 4.4-litre, twin-turbo, 300-horsepower diesel engine – that vision became reality.
Today, our V8 family also includes the 350 V8, offering 350 horsepower and increased turbo capacity for higher-displacement vessels. Building on the proven architecture of the original, the 350 V8 delivers even greater range, torque and safety – continuing our mission to redefine marine propulsion.
Our vision
The driving force behind what we do
Our vision is to pioneer the future of safe, sustainable and dependable marine propulsion.
There is a certain dedication that goes beyond simply manufacturing; it’s about crafting solutions with a purpose.
Our vision is the driving force behind every decision at Cox Marine.
Operating from our facility in Shoreham-by-Sea, in the UK, we are dedicated to developing advanced propulsion technologies that directly address the evolving needs of the global marine industry. This involves a steadfast commitment to improving environmental performance through reduced emissions and enhanced fuel efficiency.
We ensure the robust reliability and consistent power delivery that operators depend on for critical applications. Our focus is on providing solutions that not only meet today’s rigorous operational demands but also contribute to a more responsible and efficient maritime future for generations to come.
Company History
1960s
How it began
Co-founder Charles Good begins his search for a lightweight diesel engine to overcome the dangers of gasoline following a fire aboard his family boat in Greece in 1967.
2008
Vision to Reality
Charles meets David Cox and becomes Executive Chairman. With his investor group, he becomes the financier of Cox Powertrain and spearheads the development of David’s lightweight diesel into the powerhead for an outboard engine.
2010
First Fire
The first fire of Cox’s concept engine and the commencement of designs for the Alpha engine.
2017
Switch to V8
Drawing expertise from marine, automotive and aviation experience, Cox switches engine concept to twin turbo V8 design architecture, developing the outboard from a blank sheet of paper, specifically for marine use.
2020
300 V8 Production Begins
Following EPA Tier 3, RCD II and IMO Tier II certification, Cox Powertrain commences production of the 300hp diesel outboard, with the first units shipped to the market in July 2020, from world -class production facility at Brighton City Airport.
2022
Product Improvement
Following a change of management and taking learnings from early production units, Cox completes a comprehensive product improvement program and commences volume production.
2024
350 V8 Launch
Cox Marine secures international emissions certification following the launch of the 350 V8 at the start of 2024. The order book is now open for the world’s most powerful diesel outboard, with deliveries due for early 2025.
Meet The Team
Petra Argent
Cox Board Members
Latest News
Outboards
Careers
