Dorman Fuel Line Repair Tool for Nylon Tubing — Universal 800-301, Compact Cutter & Crimper

The Dorman 800-301 Fuel Line Repair Tool is a universal, easy-to-use kit designed to cut and crimp nylon fuel lines so you can replace only the damaged section instead of the whole assembly.

When a section of nylon fuel tubing becomes damaged, the fastest, most economical fix is to splice in a new segment rather than swap the entire fuel line assembly. The Dorman 800-301 provides the essential hand tools to cut, pinch, and seat fittings on a range of nylon fuel lines so repairs are quick, precise, and repeatable. The tool is part of Dorman's broader fuel line solution set and is backed by ASE Blue Seal Certified technical support.

How does this tool make fuel line repairs faster?

The 800-301 is built specifically to streamline the splice-and-repair process for nylon fuel lines. Its form factor and gripping surfaces let you work in tight engine bays with less fumbling, and the cutter produces clean, square tubing ends that improve sealing when you install connectors.

• Clean, accurate cuts reduce leak risk and fitting rework
• Compact design fits cramped under-hood spaces
• Quick pinch/seat action speeds connector installation
• Compatible with multiple nylon tubing diameters for versatility

What types of nylon fuel lines will it work on?

This repair tool is intended for nylon fuel tubing commonly used in automotive fuel systems; it handles a range of diameters so you can use it across many vehicles. It’s ideal for nylon lines rather than metal or heavily reinforced hoses.

• Suitable for the most common nylon automotive fuel tube sizes
• Not intended for braided, stainless, or high-pressure hydraulic lines
• Works with OEM-style connectors and Dorman nylon repair fittings
• Useful for both fuel and vapor lines made from nylon material

How easy is it to use for DIYers and technicians?

The 800-301 was designed with intuitive operation in mind so novices and pros can complete repairs without specialized training. The tool minimizes steps: measure, cut square, and seat the connector—no complicated adapters required.

• Simple hand-operated mechanism — no power tools needed
• Minimal setup: measure, mark, and cut the damaged section
• Works alongside Dorman tubing cutters and fuel tool gun accessories
• Backed by Dorman technical support if questions arise

What are the primary benefits compared to replacing the entire fuel line?

Repairing only the damaged portion saves time, reduces parts cost, and avoids unnecessary labor associated with full-line replacement. For fleet maintenance or budget-conscious repairs, one repair tool and a few connectors can restore service quickly.

• Lower parts and labor costs versus full assembly replacement
• Reduced vehicle downtime — faster roadside or shop repairs
• Conserves original routing and mounting hardware
• Compatible with Dorman repair kits for a complete solution

Who is this for? The Dorman 800-301 Fuel Line Repair Tool is aimed at professional mechanics, independent repair shops, fleet maintenance teams, and informed DIYers who regularly service automotive fuel systems and prefer targeted repairs. If you work on vehicles that use nylon fuel tubing and want a practical, repeatable way to splice or repair lines without replacing whole assemblies, this tool is a time- and cost-saving addition to your toolbox. For complete repair jobs, consider pairing it with Dorman tubing cutters, side jaw pinchers, or the Fuel Tool Gun and compatible Dorman nylon fuel line connectors.