Cox Marine Diesel Outboards Are Changing the Conversation

But the Real Difference Starts on the Water

Cox Marine diesel outboard engines are changing the way serious boaters think about outboard power — and there’s no better way to understand why than experiencing it firsthand. We invite you to come down to Gillen Yacht Services and get behind the wheel of our demo Intrepid, fully rigged with Cox Marine diesel outboards.

Feel the torque. Appreciate the efficiency. Understand, in real time, why this technology is a fundamental departure from everything you’ve known about outboard power. Once you’re on the water, the conversation changes.

A Vast Departure From Traditional Outboard Power

Cox Marine diesel outboards do not behave like gasoline engines. They do not sound the same. They do not deliver power the same way. They do not maneuver with the same performance profile.

What owners immediately notice is low-RPM torque — real, confident, usable power delivered in a way gas outboards simply cannot replicate.

It’s not incremental improvement. It’s a major shift in marine propulsion.

For many owners, the experience is eye-opening: once they feel the difference, they realize how much compromise they’ve accepted with conventional gasoline-powered systems.

Why Cox Marine Diesel Outboards Stand Apart

Cox Marine’s purpose-built diesel outboards were originally engineered for military and government applications, where durability, reliability, safety, and operational efficiency are mission-critical. Now, that same battle-tested technology is available for yacht tenders, center consoles, sportfishing vessels, and commercial applications.

Key Advantages Include:

  • 30–50% lower fuel consumption than comparable gasoline outboards
  • Extended operational range with significantly improved fuel economy
  • Service-free centrifugal water pump with no impellers to replace
  • 250-hour service intervals, compared to standard 100-hour gasoline service cycles
  • Direct integration with onboard diesel fuel systems, eliminating or reducing gasoline storage needs
  • No volatile gasoline vapors, improving safety and often aligning better with insurance requirements
  • Torque equivalent to a 400hp gasoline outboard, delivered at substantially lower RPM
  • 5-year / 1,500-hour warranty, one of the strongest in the outboard market
  • Standard transom mounting, allowing repowers without major vessel modifications

Gillen Yacht Services: South Florida’s Authorized Cox Marine Dealer

With over 32 years of industry leadership, Gillen Yacht Services (GYS) has established itself as South Florida’s premier full-service yacht repair, maintenance, and refit provider.

Now, as an authorized Cox Marine dealership, GYS offers:

Check button

Sales

Check button

Factory-certified installation

Check button

Warranty support

Check button

Maintenance

Check button

Integrated fuel system solutions

Check button

Complete diesel repower expertise

Service Locations Include

Why Gillen Yacht Services Is Uniquely Positioned

Installing and supporting diesel outboard systems requires more than engine sales. It demands:

  • Mechanical expertise
  • Fuel system integration
  • Electrical knowledge
  • Custom fabrication
  • Precision rigging
  • Long-term service capability

 

Gillen Yacht Services’ in-house multidisciplinary team is built specifically for these advanced installations.

As David Gillen Sr., CEO of Gillen Yacht Services, explains:

“These engines fundamentally change how yacht tenders and support vessels operate by improving safety, reducing maintenance, and extending operational range.”

The Future of Tender and Support Vessel Propulsion

For discerning yacht owners, operational efficiency is no longer optional. Today’s owners increasingly prioritize:

  • Longer range
  • Lower operating costs
  • Reduced maintenance
  • Enhanced safety
  • Greater reliability

 

Cox Marine diesel outboards directly answer those demands. Backed in the United States by Ring Power Corporation — Cox Marine’s largest North American distributor — and installed by Gillen Yacht Services’ factory-trained technicians, this technology represents a transformative opportunity for yacht owners seeking superior performance.

Experience is everything

A dockside display may spark interest. But a sea trial changes perception.
Because once you feel the torque, efficiency, and confidence of Cox diesel power firsthand, the question often shifts from:

“Why diesel?”

to

“Why didn’t I make this move sooner?”

For yacht tenders, center consoles, and support vessels, Cox Marine and Gillen Yacht Services are not simply offering another propulsion option. They are redefining what owners should expect from outboard performance.