Fuel Line Assemblies
Representative Photo, actual item may vary
Sierra 118-8009EP-2 EPA Fuel Line Assembly for Johnson Evinrude 3/8 Inch 8 Foot
What Are Fuel Line Assemblies?
A fuel line assembly is the complete system that carries gasoline from your tank to your engine — typically consisting of a length of fuel-rated hose, a primer bulb, tank and engine fittings, and stainless steel clamps. In marine and RV applications, where vibration, UV exposure, ethanol-blended fuel, and saltwater environments push every component to its limits, a reliable fuel line assembly isn't just a convenience item — it's a safety-critical part of your vessel or vehicle.
Over time, fuel hoses crack, primer bulbs harden, and fittings corrode. A degraded fuel line doesn't just affect engine performance — it creates a genuine fire hazard. Swapping out a worn assembly before a failure occurs is one of the most important pieces of preventive maintenance any boater or RV owner can perform.
What to Look for When Shopping Fuel Line Assemblies
- OEM Compatibility: Match the assembly to your specific engine brand and model year. Connectors for Mercury, Yamaha, Johnson/Evinrude, and BRP all differ in design.
- Hose Diameter: Most outboard applications use 3/8" ID hose, while some smaller engines require 5/16". Always verify your engine's spec.
- EPA/CARB Compliance: Low-permeation hose is required by federal and California regulations. Look for assemblies that are certified compliant.
- Ethanol Resistance: Today's pump gasoline frequently contains ethanol blends. Choose assemblies specifically rated for ethanol-blended fuels to prevent hose degradation.
- Complete Kits vs. Bulk Hose: Ready-to-use kits come pre-assembled with fittings and primer bulbs — ideal for most boaters. Bulk hose is better for custom installations or trimming to exact lengths.
Top Brands in Fuel Line Assemblies
Scepter is one of the most recognized names in marine fuel system components. Their fuel line assemblies are OEM-compatible with major outboard brands — including Mercury, Yamaha, and BRP Johnson/Evinrude — and are engineered to meet EPA/CARB low-permeation standards. Scepter's universal and engine-specific kits include everything needed for a complete replacement, making them a go-to for boaters who want a clean, confidence-inspiring install.
Moeller Marine has built a strong reputation in the marine aftermarket for fuel line assemblies that use UV-resistant, EPA- and CARB-approved hose paired with solvent-resistant primer bulbs featuring dual internal check valves. Moeller's assemblies cover an extensive range of outboard applications, with OEM-spec fittings and O-ring construction on all connections for tight, leak-free performance.
Dorman brings its deep automotive aftermarket expertise to fuel line assemblies for cars, trucks, and powersports applications. Their OE FIX line features upgraded stainless steel construction and pre-formed designs that match OEM fit and function — and come backed by a limited lifetime warranty. Dorman fuel line assemblies are an excellent choice for land-based vehicles where corrosion from road salt and underhood heat is the primary concern.
When to Replace Your Fuel Line Assembly
Inspect your fuel lines at the start of every boating season or before extended RV trips. Look for cracking, stiffness, discoloration, or swelling in the hose; a primer bulb that won't hold pressure or feels sticky; and fittings that show signs of corrosion or leakage. When in doubt, replace the entire assembly — the cost is minimal compared to the risk of a fuel leak on the water or the road.