Fuel Hose Service for a 2017 Honda Rancher 420 4x4 DCT IRS EPS

Shop parts for a 2017 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Anyone who has spent a season on a 2017 Rancher 420 4x4 DCT IRS EPS knows how smoothly the dual clutch transmission normally behaves, which is exactly why a fuel delivery problem on this machine feels so strange. The engine gets soft, the transmission starts hunting, and it all points somewhere other than a length of rubber hose. This Rancher is fuel injected with a pump inside the tank and no petcock anywhere in the system, so the hose you are replacing is a pressurized line that must be bled down before it is opened.

How Age Works Against Fuel Hose

The rubber used for fuel line stays flexible because of softening agents blended into the compound, and those agents slowly leave over years of heat and airflow. What remains is a stiffer, thinner wall that cannot absorb vibration the way it once did, so the hose begins to craze wherever it bends around a bracket. Dry climates speed the process along, since low humidity draws moisture out of the hose from the outside in.

Meanwhile, ethanol-blended gasoline standing in the system through a quiet stretch of the year attracts water and slowly eats at the inner liner. That inner damage is invisible from the outside, and it is the reason a hose that looks acceptable can still be feeding debris toward the injector. On a machine that has been in service since 2017, replacing the line as a matter of age is sound preventive work.

Reading the Machine's Complaints

Watch for these before the hose lets go completely:

  • Fuel odor near the front of the quad, strongest in the first minutes after shutdown
  • A small stain or wet spot on the ground beneath the tank area
  • Cracks, chalkiness, or a rigid feel when the hose is squeezed
  • Bogging on climbs, a lean stumble off idle, or hesitation under a load
  • Dirt caked in a ring at a fitting, which marks a slow weep that has dried repeatedly

On an injected system, pressure-side leaks frequently evaporate before they drip, so a persistent smell with no visible puddle is still a real finding. Do not dismiss it because the floor looks clean.

A Short List of What You Need

This job needs no specialty equipment beyond a release tool for locking couplers. Collect fuel-rated hose in the original inside diameter and pressure rating, new clamps in the correct style, line-clamping pliers to pinch off any low-pressure section since there is no fuel valve, gloves, eye protection, an approved container, a drain pan, hand tools for the seat and bodywork, and a razor knife for a stubborn hose. A digital camera or phone earns its place too, because photographing the routing before removal saves guesswork later.

Handle the gasoline with respect. Do this work outdoors or with the shop door open, since vapor collects low and travels, and any pilot light or spark at floor level is a genuine ignition source. Keep the fuel container capped between pours and put oily rags outside rather than in a pile on the bench.

Pressure Down, Hose Off

Remove the fuel pump fuse, then crank the engine for a second or two until it stalls, which drops the pressure in the line. Switch the ignition off and disconnect the negative battery terminal. Pull the seat and the panels covering the tank, then follow the hose from the pump flange to the throttle body, noting every clip along the way. This is a 4x4 chassis with independent rear suspension, and while the rear layout has little bearing on the fuel run, the front driveline hardware means a couple of extra clearance points a 2x4 machine would not have.

Set the pan under the first joint and lay a rag over it. Ease clamps back along the hose before opening anything, and for a quick-connect coupler squeeze the tabs evenly while pulling straight out. Weathered plastic collars break when they are pried. If a hose end has bonded to its barb, slice it lengthwise and peel it rather than wrenching on the fitting, which can loosen or damage a throttle body nipple.

Dry Fit and No Lubricant

Trim the new hose to the original length, then work each end onto its barb until it bottoms out fully. Assemble everything dry. Grease, oil, and silicone all compromise the seal between hose and fitting by giving pressurized fuel a slick escape route, and none of it belongs on this job. Softening a stiff hose end in hot water for a few seconds is the right way to make it slide.

Place new clamps just behind the bead on each fitting and tighten them evenly, firm but not crushed. A self-locking quick-connect at the tank end takes no clamp at all; push it until it clicks and then pull to confirm it is latched. Route the finished hose back through its original guides so it stays away from the exhaust, the front differential, and the steering components, with no tension at either end when the suspension moves.

Confirming a Dry Repair

Reinstall the fuse, Reconnect the battery, and turn the key on and off several times. Each cycle primes the pump and loads the line, so you can inspect both connections before the engine ever runs. Wipe them with a clean rag and look closely for a shine or a damp streak. Start the machine, let it idle, and check both joints once more with the rag while the system is at full operating pressure.

Worth noting on this platform: the fuel filter is built into the in-tank pump module, not clipped inline on the hose you just replaced. If the Rancher still feels starved after a clean, leak-free installation, that internal filter and pump assembly is where the investigation continues.

Related Shopping Categories

Shop Fuel Lines for a 2017 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Fuel Line Clamps for a 2017 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Petcocks for a 2017 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Fuel Filters for a 2017 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.

Shop Fuel Stabilizer for a 2017 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.