Swapping the Fuel Line on a 2016 Honda Rancher 420 4x4 DCT IRS EPS

Shop parts for a 2016 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Farm and ranch Ranchers rack up hours faster than trail machines, and the fuel hose on a hard-working 2016 Rancher 420 4x4 DCT IRS EPS ages on engine heat and vibration rather than on the odometer. Before you touch anything, get the fuel system straight in your head: this model is fuel injected, fed by a pump inside the tank, and there is no fuel valve to close. Everything downstream of that pump is a pressurized circuit, and the procedure below is built around that reality.

Spotting Trouble Before You Get Stranded

A hose rarely bursts without warning. The tells worth watching are a faint gasoline smell that lingers around the front of the machine after shutdown, a small wet ring on the floor where the quad was parked, and hairline cracking on the hose itself that becomes obvious when you flex it between two fingers. Squeeze the line along its length; a healthy hose gives and springs back, while a tired one feels like plastic tubing.

Performance clues matter just as much. An engine pulling air through a split line or starving through a collapsing one will bog on hills, stumble when you snap the throttle, and geneRally act like it is running out of gas with a half-full tank. Because this Rancher uses the automatic dual clutch transmission, that fuel starvation often shows up first as odd shift behavior, since the transmission keeps searching for a gear the engine cannot pull.

The Chemistry Behind a Hardened Hose

Rubber fuel line is a compound, not a solid, and the softeners blended into it slowly migrate out over years of heat cycles. As those compounds leave, the wall shrinks and stiffens, then cracks where it is bent around a frame guide. Machines kept in arid climates harden faster because low humidity pulls moisture from the hose wall, which is why a Rancher in high desert country may need hose sooner than an identical machine in a humid region.

The other half of the problem comes from inside. Ethanol-blended fuel left standing during an off season absorbs water and gradually degrades the inner liner, softening it and encouraging gum deposits to form. The result is a hose that is brittle outside and deteriorating inside at the same time, which is why age is a better replacement trigger than a quick visual look.

Gathering Gear and Working Safely

Have all of this laid out before you begin:

  • Fuel-rated replacement hose in the original inside diameter, pressure rated for an injected system
  • New clamps of the correct style and size, or a small clamp assortment
  • Line-clamping pliers, which stand in for the petcock this model does not have
  • Gloves, eye protection, and a stack of clean rags
  • An approved fuel container and a drain pan
  • Sockets and drivers for seat, fender, and tank fasteners, plus a razor knife

Gasoline is the real hazard here, not the wrenching. Work in open air or with the door wide open, because fuel vapor sinks and pools at floor level where a water heater pilot or a battery charger spark can find it. Keep a fire extinguisher nearby, skip the shop heater entirely, and wash any splashed skin promptly.

Depressurizing and Freeing the Old Line

Start by removing the fuel pump fuse and cranking the engine for a couple of seconds so it stalls with the circuit bled down. Turn the key off and disconnect the negative battery cable. Pull the seat and whatever fender or side panels stand between you and the tank, then trace the hose from the pump flange to the throttle body so you know every clip it passes through.

Position the drain pan, cover the joint with a rag, and open the first connection. Slide spring clips or worm clamps back along the hose before disturbing anything. If the tank end uses a locking quick-connect, compress both tabs squarely and pull the coupler straight off — twisting or levering it will crack a collar that has spent years in the weather. A hose glued to its barb by old fuel varnish comes off cleanest with a lengthwise razor cut, which protects the fitting underneath. On this 4x4 model the line threads past more frame bracing than a two-wheel-drive layout, so note each clearance point as it comes free.

Making the New Connections

Match the replacement to the length of the piece you removed. Too long and it rubs a frame rail or contacts hot exhaust; too short and it pulls at the fittings every time the chassis flexes. Slide each end fully home until it stops against the shoulder of the barb, and keep every lubricant away from the job. Grease and silicone on a fitting create a slick path for pressurized fuel to escape past the clamp, so if the hose resists, warm it in hot water instead.

Locate new clamps just behind the bead on each fitting and snug them evenly. Where a self-locking quick-connect is used, push until it clicks audibly, then pull on the hose to verify the lock has engaged; that connection is designed to hold without a clamp. Finally, seat the hose back into its factory clips so it clears the front differential hardware and the power steering harness.

Pressure Test and Buttoning Up

Refit the pump fuse, Reconnect the battery, and cycle the ignition several times without cranking. Each cycle repressurizes the line, letting you check for weeping while everything around the fittings is still dry. Run a clean rag around both joints, looking for even a faint damp streak. Start the engine afterward, let it idle for several minutes, then repeat the rag test before the plastics go back on.

Keep in mind that the filter on this injected Rancher lives inside the tank as part of the pump module rather than sitting inline where you can inspect it. Fresh hose fixes leaks and cracks, but if the machine still stumbles under load once the line is clean and dry, that in-tank assembly becomes your next area to investigate.

Related Shopping Categories

Shop Fuel Lines for a 2016 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Fuel Line Clamps for a 2016 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Petcocks for a 2016 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Fuel Filters for a 2016 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Fuel Stabilizer for a 2016 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your ATV's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.