Government & Defense Diesel Outboards

Range, Reliability, COmpliance

Spec Sheet

Built for Mission-Critical Operations

Extended range, diesel safety, and certified performance for patrol, defense, and unmanned systems-backed by Ring power installation and support.

EPA Tier 3 / IMO II / RCD II compliant. Spark-free diesel safety

  • Certified Compliance: EPA Tier 3 / IMO II / RCD II

  • Spark-Free Safety: Safer than gasoline for high-risk environments

  • Extended Range: Fewer refuels, more operational hours

  • High Torque at Low RPM: Reliable maneuvering for patrol and defense vessels

  • Lower Lifetime Fuel Cost: Diesel efficiency for budget-conscious agencies

    • High torque at low RPM for precise maneuvering in harbor environments

    • Extended range reduces mid-shift refueling downtime

    • Certified diesel safety for crowded port operations

    • Rapid deployment with instant throttle response and heavy-duty reliability

    • Diesel efficiency enables longer patrol shifts on a single tank

    • Spark-free operation for safer emergency response environments

    • Long-duration endurance missions supported by superior fuel economy

    • Simplified logistics — diesel aligns with existing fleet fuel infrastructure

    • Proven reliability for autonomous and remote defense operations

    • IMO II / EPA Tier 3 compliance for secure international operations

    • Extended range to cover long coastlines and border patrol sectors

    • Rugged durability built for constant, mission-critical duty cycles

Why Cox Marine Diesel Outboards Lead in High-Stakes Operations

  • No Ignition Risk – Compression-ignition diesels eliminate explosive hazards.

  • Extended Mission Range – Superior fuel efficiency supports long-duration deployments.

  • Mission-Ready Design – High torque, quick response, NMEA 2000 compatibility, and flexible mounting.

  • Low Maintenance, High Uptime – Designed for rugged reliability when it counts most.

  • Compliance You Can Trust – Certified to global standards without sacrificing power.

Government Procurement Support

Streamlined acquisition for mission-critical fleets

Ring Power and Cox Marine simplify the procurement process with documentation and compliance resources designed for government buyers.

What’s Included:

  • SOW Templates & Spec Sheets – Ready-to-use technical documentation for faster evaluations

  • NSN-Ready Documentation – Supports federal and defense acquisition processes

  • Compliance Certifications – EPA Tier 3, IMO II, RCD II certifications packaged for contracting teams

Real-World Validation & NATO Fuel Compliance

  • U.S. Navy field trials confirmed the diesel outboards delivered smooth, smoke-free performance—enhancing combat readiness.

  • Fully NATO-compatible via single-fuel logistics, simplifying fleet fuel strategy and deployment.

Mission-Ready Integration & Global Use

  • Designed for NMEA 2000 and mil-grade control systems, enabling seamless retrofit into existing platforms.

  • Trusted by international agencies, including Swedish Navy, Coast Guard, and Maritime Rescue, tested under operational stress. 

Technical Excellence & Certification

  • Certifications: Meet or exceed IMO II, RCD II, EPA Tier 3, and BSO‑II environmental standards.

  • Performance: Up to 1,052 Nm torque and exceptional fuel efficiency—extended endurance with lower cost of ownership.  

Government Partnerships
More Government and Commercial Choose Cox Marine Diesel Outboards

Cox Marine diesel outboard completed successful in-field validation tests by the US Navy, exceeding expectations with its performance. The trials, conducted on a 9m RIB, showcased the engine's smoothness, low noise, and absence of smoke, qualities that impressed Naval Sea Systems Command (NAVSEA) testers. This achievement aligns with the US Navy's goal of improving combat readiness, crew safety, and equipment supportability.

Cox Marine diesel outboards have garnered worldwide interest from civil and government agencies operating fleets of fast response vessels. It offers exceptional performance and greater range than equivalent 300hp gasoline outboards, complying with NATO's single-fuel policy. Cox's engineering team, led by Stephen Moore, has developed the highest power density outboard ever created for a marine application, providing the performance and efficiency of an inboard with the convenience of an outboard.

In Sweden, Cox's high-performing engine has also made a significant impact, especially among professional users such as the navy, maritime rescue, and coastguard. The CXO300's impressive performance and capabilities were showcased at the Marstrand Boat Show and All at Sea events, generating enthusiastic feedback and interest from customers. Peter Nauwerck, CEO of Diesel Power AB, Cox's Sweden distributor, highlighted the engine's suitability for government agencies requiring robust and safe engines for long-range operations.

Diesel outboards, like Cox's CXO300, combine the endurance, torque, and fuel efficiency of inboard stern drives with the flexibility and replicability of outboards, making them ideal for commercial and government operators. Cox Diesel models are specifically designed for commercial users, offering reliability, endurance, flexibility, and agility for a wide range of vessels and applications, from harbor work to coast guard and search and rescue operations.