• Fuel Tank Cleaning
  We eliminate sludge, debris, and microbial growth that compromise fuel quality and engine performance.
• Advanced Tank Cleaning Technology
  Our equipment goes far beyond standard industry polishers — delivering  well over 100% more cleaning power. These tools are highly specialized,  designed for in-tank use with proprietary techniques developed over  decades. This level of technology is not accessible to newcomers in the  industry and requires years of training and hands-on experience to  operate safely. Improper use could result in severe vessel damage and  environmental risk. For this reason, most jobs are performed at under  100% capacity to ensure safe operation — while still providing unmatched  tank cleaning performance,
• Professional Fuel Polishing
  Advanced filtration and polishing equipment restore fuel clarity and remove contaminants — protecting engines and fuel systems.

* Please feel free to read more about are fuel polishing & tank cleaning page.

 We perform calibrated pressure testing to verify tank integrity, ensuring safety and leak-free operation. 

 We restore or replace deteriorated or corroded fuel tanks using  marine-grade, corrosion-resistant materials. To help prevent external  corrosion, we ensure proper ventilation and airflow within the tank  locker to minimize trapped moisture and salt air exposure. Each tank  installation is carefully grounded and bonded to reduce galvanic  corrosion. Our approach extends the life of your fuel system. 

* Please read more about are fuel tank replacement page.

 Using advanced composite techniques like carbon fiber vacuum  bagging, we reinforce tanks and compartments with high-strength  materials for long-term durability. 

Professional fuel filter replacement to keep your vessel running clean and reliable. Over time, water and sediment collect in your fuel system, clogging filters and reducing flow. We replace all primary and secondary filters and verifying proper operation with a full leak check and system prime.

We also offer complete primary filter total rebuilds using OEM-quality rebuild kits, including new O-rings, gaskets, seals, and elements. Every rebuild includes full disassembly, cleaning, seal replacement, lubrication, reassembly, and a pressure-tested verification before your system is primed and run-tested. A properly serviced primary fuel filter protects your engine from contamination and prevents costly injector or pump damage, ensuring dependable performance every time you head out on the water.

 Our team safely installs access ports even in volatile gasoline  tanks, using spark-proof, explosion-safe equipment in full compliance  with marine safety standards. 

We fabricate and install custom onboard fuel polishing systems, giving you the power to manage fuel purity independently. Every system is tailored to your vessel, with clean, professional integration of pumps, filters, manifolds, and controls. Systems are designed, fabricated in-house, and installed to the highest marine safety and performance standards.

• Custom Transfer System Design & Installation
  Whether you need fuel routing for redundancy, long-range capability, or  multi-tank systems, we design tailored onboard fuel transfer solutions.
   
  • Multi-tank switching
  • Digital or manual controls
  • Failsafe return management
  • Commercial- and yacht-grade scalability
• System Integration & Commissioning
  Seamless integration between transfer, polishing, and filtration systems  ensures reliable flow control, safety, and operational efficiency.

 
Engineered for precision and control, our custom manifolds offer clean,  efficient fuel routing — ideal for complex or multi-engine  configurations. 

 Combustible gas sniffer systems are essential safety equipment for any vessel, continuously monitoring the bilge and fuel compartments for dangerous fumes such as gasoline vapors, diesel vapors, or propane leaks. These systems use highly sensitive sensors to detect even low-level concentrations and alert the crew with audible and visual alarms before conditions become explosive. A properly installed and regularly tested sniffer system provides early warning, protects your vessel from fire or explosion, and gives you peace of mind every time you turn the key. 

• 30+ Years of Specialized Marine Experience
  We’re experts in marine fuel systems — not generalists. Our work reflects decades of deep, focused knowledge.
• Industry-Leading Tools & Techniques
  From composites to digital diagnostics, we invest in the best to give you the best.
• Non-Invasive Work Practices
  Your boat stays protected — our tools never touch finished surfaces directly.
• Transparent, Ethical Service
  We deliver what we promise. No shortcuts. No surprises. Just quality you can count on.

Whether you're preparing for extended cruising or optimizing a commercial vessel, FUEL TEC Key West delivers unmatched results grounded in safety, expertise, and innovation.