Diesel outboards supporting cleaner, safer seas, everywhere
Advanced V8 diesel outboards delivering exceptional torque, extended range, and low-maintenance reliability for every mission.
300 HP & 350 HP models
HIGH TORQUE AT LOW RPM
Advanced diesel outboard engines engineered for commercial, government, and recreational vessels.
Available in 300 hp and 350 hp variants, the Cox V8 combines up to 1,052 Nm of torque at just 2,600 RPM with best-in-class fuel efficiency – delivering explosive acceleration, extended range, and lower operating costs. Built on a compact 60° V-8 platform with twin-turbo charging, these outboards offer rock-solid reliability, minimal maintenance, and full EPA Tier 3, IMO II, and RCD II certification for government, commercial, and recreational use.
SAFETY AT THE CORE
Our compression-ignition diesel system eliminates the explosion risk of gasoline vapors, providing inherently safer operation in every environment – whether you’re on a patrol boat, workboat, or pleasure craft.
Learn how our outboards excel in government, commercial, and leisure applications.
When you choose Cox Marine
you choose safer, cleaner seas everywhere
1.2x SAFER
Superior Performance
High torque throughout the powerband for precise acceleration and handling.
30% LESS FUEL BURN
Fuel Efficiency
Up to 30% less fuel burn than gasoline outboards, extending range and cutting operating costs.
MINIMIZE DOWNTIME
Low Maintenance
Extended service intervals and rugged design minimize downtime and maintenance expense.
Build Features
1. Twin Turbo Engine
The V8 has twin turbos that generate significantly more torque at lower RPM and maintain power across engine speeds.
2. Vertical Crankshaft
The vertical design allows for efficient packaging and direct drive of the transmission, providing closer transom spacing for multiple installations.
3. Power Distribution Module
Equipped with self-resetting fuses, this module allows for active power management of the outboard power systems.
4. Electronic Controls & Steering
The Optimus steering enhances control of your vessel. Compatibility with the NMEA200 makes it easy to install on a wide range of vessels.
5. Power Tilt -Trim
Designed in-house, the V8’s PTT bracket is built to withstand the toughest conditions and has undergone extensive durability testing.
6. Universal Transom Bolting Pattern
Allows easy installation to a wide range of vessels, making re-powering easier than ever.
7. Transmission
The transmission has been specifically designed to withstand high torque, even in the most challenging sea conditions.
8. Standard Propeller Spline
1.25 “19-tooth spline output ensures both durability and compatibility with a range of industry-standard hub kits and propellers.
Technical Specifications 60° V8
| Power Output | 300 HP (224 kW) |
| Emissions Certifications | EPA 3, IMO II, RCD II, BSO-II |
| Max RPM | 4,000 |
| Displacement | 4.4L (266 cu.in) |
| Dry Weight | 393 kg (866 lbs)* |
| Aspiration | Twin-turbo |
| Gear Ratio | 1.46:1 |
| Shaft Lengths | 25", 30" & 35" |
| Power Output | 350 HP (260 kW) |
| Emissions Certifications | EPA 3, IMO II, RCD II, BSO-II |
| Max RPM | 4,000 |
| Displacement | 4.4L (266 cu.in) |
| Dry Weight | 393 kg (866 lbs)* |
| Aspiration | Twin-turbo |
| Gear Ratio | 1.46:1 |
| Shaft Lengths | 25", 30" & 35" |
Commercial Warranty
12 months
1000 hours
Commercial Warranty+
18 months
1500 hours
Recreational Warranty
5 years
1500 hours
The Cox Marine V8
Your Engine, Your Way
Performance Data
Our vision
Pioneering sustainable propulsion solutions to protect our oceans and empower maritime operations.
Innovation starts at our state-of-the-art facility, where cutting-edge engineering meets world-class manufacturing. Our purpose-built production site is a testament to our commitment to quality, sustainability, and continuous investment in the future of marine propulsion.
Designed for precision and efficiency, our facility integrates advanced manufacturing processes with rigorous quality control, ensuring every Cox Marine outboard meets the highest standards of performance and reliability. With a team of expert engineers, skilled technicians, and industry specialists, we are driving forward the next generation of sustainable marine technology.
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About Cox Marine
