How to Change the Fuel Line on a 2018 Rancher 420 4x4 DCT IRS EPS
Shop parts for a 2018 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.
Mud, water crossings, and pressure washing are all part of life for a working 2018 Rancher 420 4x4 DCT IRS EPS, and the fuel hose absorbs more of that abuse than most owners realize. Grit works into the clips, the hose chafes at every guide, and the outer wall picks up damage that eventually turns into a leak. Getting a fresh line on the machine is straightforward once you understand what you are dealing with underneath the bodywork.
Know What You Are Working On
This Rancher uses programmed fuel injection. There is no fuel valve on the tank, no gravity feed, and no float bowl to drain, which are all features of a carbureted setup rather than this one. Instead, an electric pump inside the tank pushes fuel through the supply hose to the throttle body and holds pressure in that line even after the engine is shut off. That pressure has to be released before you loosen anything, and the hose you buy has to be rated for an injected system rather than the soft low-pressure tubing sold for carburetor use.
The other detail worth noting is that the fittings may not be simple barbs. Injected machines often use a locking quick-connect coupler at the tank end, which releases with a squeeze on two tabs and needs no clamp when reassembled. Identify which style your machine has before you start pulling, so you have the right clamps and release tool on hand.
Prep Work and Ventilation
Lay out your supplies first:
- Pressure-rated fuel hose matched to the original inside diameter
- New clamps in the correct style and size
- Line-clamping pliers, since there is no petcock to shut fuel off
- Gloves, safety glasses, an approved fuel container, and a drain pan
- Basic hand tools for seat, fender, and tank hardware, plus a razor knife and rags
Take the gasoline safety seriously. Fuel vapor is heavier than air and pools near the floor, so a fully open door or outdoor work area is not optional. Kill anything with a flame or a spark in the space, including heaters and battery chargers, and keep the container capped except when you are actually pouring into it.
Why Hose Goes Bad on This Platform
Fuel line hardens with time as the softeners in the rubber leave the compound. Engine heat drives that out faster, and the constant flex of a utility chassis in rough terrain concentrates stress at the bends, which is exactly where cracks first appear. Owners in dry regions notice the hardening earlier because arid air pulls moisture from the hose wall.
Ethanol-blended fuel contributes from the inside. Left standing for months, it draws in water and slowly breaks down the inner liner, producing a soft interior surface and gum deposits that migrate downstream. Neither process is dramatic, and together they explain why a hose approaching a decade in service should be replaced whether or not it looks bad.
Warning Signs You Should Not Ride Through
A fuel smell that hangs around the machine after shutdown is the earliest reliable clue, especially on an injected system where a pressurized seep can atomize and vanish before it puddles. Beyond that, look for a wet spot or dried stain beneath the frame, visible cracking or a chalky texture on the hose, and stiffness where the line should still be pliable. Grit packed into a dark ring at a fitting is another sign that fuel has been weeping and drying there for some time.
Running symptoms round out the picture. Bogging on hills, hesitation when you crack the throttle, and behavior that feels like a nearly empty tank all point toward restricted or leaking supply. With the dual clutch transmission doing the shifting, that shortfall often reads as the machine hunting between gears rather than an obvious fuel problem.
Removal Without a Mess
Pull the fuel pump fuse and crank the engine briefly until it stalls, which bleeds the line down. Turn the key off, then disconnect the negative battery cable. Remove the seat and the panels covering the tank until the whole hose run is visible from the pump flange to the throttle body. Slip a drain pan underneath and hold a rag over the first fitting you open, because residual fuel will still come out.
Slide any spring clip or worm-gear clamp back along the hose before disturbing the joint. On a quick-connect, press both tabs evenly and pull the coupler straight off without leverage; aged plastic breaks easily. Where varnish has locked a hose to its barb, cut it lengthwise with a razor and peel it away instead of forcing it. Being a 4x4, this Rancher routes its line past additional frame structure and front driveline hardware, so photograph each clip and clearance point before the old hose is completely out.
Installing the Replacement Hose
Cut the new hose to match the old one exactly. Push each end fully onto the barb until it seats against the shoulder, working entirely dry. Nothing lubricated belongs on a fuel fitting — grease and silicone give pressurized fuel a channel to weep through, even under a properly tightened clamp. If the hose is too stiff to seat, dip the end in hot water for a few seconds and try again.
Set the clamps just behind the raised bead on each fitting and tighten them evenly. If your machine uses a self-locking quick-connect at the pump flange, push until it clicks and tug firmly to confirm engagement; that fitting is meant to run without a clamp. Reinstall the hose in its factory clips so it clears the exhaust, the front differential, and the power steering wiring, with a little slack but no loops.
A Careful Look Before the First Ride
Refit the pump fuse, Reconnect the battery, and cycle the key on and off five or six times without starting. Each cycle pressurizes the line so you can inspect the joints while they are still dry, and a clean white rag will reveal a seep that your eyes miss. Then fire the engine, let it idle several minutes, and repeat the check with fresh rags before any bodywork goes back on.
One last point specific to this Rancher: the fuel filter is integrated into the in-tank pump assembly rather than sitting inline where it can be swapped from outside. New hose cures a leak or a crack, but a machine that still starves for fuel afterward is telling you to look inside the tank next.
Related Shopping Categories
Shop Fuel Lines for a 2018 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.
Shop Fuel Line Clamps for a 2018 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.
Shop Petcocks for a 2018 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.
Shop Fuel Filters for a 2018 Honda Rancher 420 4X4 DCT IRS EPS (FA6) ATV.
Shop Fuel Stabilizer for a 2018 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.