Fuel Hose Replacement Guide for the 2017 Suzuki KingQuad 500AXi 4x4

Shop parts for a 2017 Suzuki King Quad 500AXi 4X4 ATV.

Modern pump gasoline is harder on rubber than most owners realize. Nearly every gallon sold contains ethanol, and ethanol is what quietly shortens the life of the fuel hose on a 2017 KingQuad 500AXi. Combine that with a decade of heat cycles and you have a part worth replacing before it makes the decision for you on a trail miles from the truck.

What Ethanol and Time Do to Rubber

Alcohol in blended fuel attracts moisture and slowly works on the inner liner of a hose, softening it and loosening particles that head downstream toward the injector. Fuel left in the system between uses does the most damage, since it has time to sit against the same section of rubber and leave gum and varnish behind at the fittings.

From the outside, a different process runs at the same time. Engine heat drives the softening agents out of the hose wall year after year, so the rubber hardens, loses flexibility, and eventually cracks where it bends. Dry climates speed this up because low ambient humidity keeps drawing moisture from the material. The two effects together mean a hose can be hardening outside while degrading inside, which is why age matters more than appearance on a machine this old.

Injection Means a Different Approach

The AXi name confirms electronic fuel injection on this KingQuad, and that changes several assumptions carried over from carbureted quads. You will not find a petcock beneath the tank, there is no float bowl drain screw, and fuel does not arrive by gravity. A pump inside the tank pressurizes the supply hose, and that pressure remains after shutdown. So the job starts with relieving pressure rather than closing a valve, uses hose rated for injection service, and may involve a self–locking coupler at the pump plate instead of a simple barb and clamp. Line–clamping pliers cover the low–pressure sections where a valve would otherwise help.

Catching a Failing Line in Time

Inspect with your hands as well as your eyes:

  • Look under the machine after it has been parked for a fuel puddle or a repeating damp patch
  • Follow your nose, since a gasoline smell often shows up before any visible drip on a pressurized system
  • Flex each accessible bend and watch for hairline cracks opening in the surface
  • Pinch the hose along its length, feeling for hard, glassy sections that no longer compress
  • Note running problems that suggest fuel starvation, including bogging under load and a lean stumble on hard throttle

A pinhole on the pressure side may spray a mist that evaporates before it reaches the ground, so the absence of a puddle is not proof the hose is sound.

Setting Up the Job

Assemble your supplies before anything comes apart: gloves, eye protection, injection–rated hose in the matching inside diameter, new clamps of the correct type, a quick–disconnect release tool if needed, line–clamping pliers, an approved fuel container, a catch pan, rags, a socket set, and a plastic trim tool for the panels.

Then get the workspace right. Gasoline vapor is heavier than air, so it slides down and collects at floor level rather than drifting out an open window. Roll the quad outside if you can, or open the door completely and give yourself airflow at ground height. Space heaters, shop lights sitting on the floor, and anything with a pilot light need to be out of the area entirely while a fuel line is open.

Disconnecting the Old Hose

Relieve pressure first by pulling the fuel pump fuse or relay, cranking until the engine stalls, shutting off the key, and disconnecting the battery negative terminal. Remove the seat and the side plastics to expose the tank fitting, and trace the hose to the throttle body so both ends are accounted for. Slide the pan into place and drape a rag over each joint before you open it, because fuel remains in the hose regardless of pressure.

Push clamps back along the hose before touching the fittings. Locking couplers release with even pressure on both tabs and a straight pull; prying sideways is what breaks a plastic collar that has aged under the bodywork. A hose fused to its barb loosens with a gentle rotation, and if it truly will not move, slice it lengthwise and peel it off rather than risking the fitting. Note how the line was routed. On this 4x4 chassis it passes clearance points around front differential hardware and additional frame structure, so reproducing the original path matters.

Fitting and Clamping the New Line

Cut the replacement to the same length as the piece you removed. Push each end fully onto its barb until it seats, working it on dry. Nothing lubricated belongs on a fuel fitting, since grease or silicone on the sealing surface gives pressurized fuel a route past the clamp and produces a weep that may not appear for weeks. Warm a tight hose end briefly in hot water instead of forcing it.

Position new clamps just behind the raised bead on each fitting and tighten them evenly, firm without cutting into the rubber. Where the machine uses a self–locking quick–connect, push until you hear the click and pull to confirm engagement, and skip the clamp there. Return the hose to its factory clips so it stays away from the driveline and hot surfaces.

Leak Inspection and Wrap–Up

Refit the fuse, Reconnect the battery, and cycle the key on and off several times without cranking so the pump primes and pressurizes the hose with the engine still. Inspect both joints in that quiet state, wipe them dry with a clean rag, then start the 500AXi and look again at idle and after a few minutes of warm running.

Finally, note that the injected KingQuad carries its fuel filter inside the tank with the pump assembly rather than as an inline item you can see. New hose stops a leak, but a clogged in–tank filter produces the same starved–engine behavior, so that assembly deserves attention if hesitation lingers after the repair.

Related Shopping Categories

Shop Fuel Lines for a 2017 Suzuki King Quad 500AXi 4X4 ATV.

Shop Fuel Line Clamps for a 2017 Suzuki King Quad 500AXi 4X4 ATV.

Shop Petcocks for a 2017 Suzuki King Quad 500AXi 4X4 ATV.

Shop Fuel Filters for a 2017 Suzuki King Quad 500AXi 4X4 ATV.

Shop Fuel Stabilizer for a 2017 Suzuki King Quad 500AXi 4X4 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.