Replacing a Cracked Fuel Line on Your 2023 Sportsman 570 6x6

Shop parts for a 2023 Polaris Sportsman 570 6X6 ATV.

Rubber has a shelf life, and fuel hose has a shorter one than most owners expect. Even on a machine as recent as the 2023 Polaris Sportsman 570 6x6, the line running from tank to engine is a wear item rather than a permanent part. Understanding what actually kills it makes the difference between replacing a hose on your schedule and replacing it on the side of a two-track with fuel dripping onto the skid plate.

What Breaks Down Inside the Hose

Two separate processes attack the same piece of rubber. From the outside, heat cycling off the ProStar 567cc single and ordinary sun exposure slowly drive out the plasticizers that give the hose its flexibility. The wall stiffens, loses its ability to move with the chassis, and eventually develops fine surface cracks that deepen with every cold start. Arid climates speed this up noticeably, since low humidity pulls residual moisture out of the rubber and hardens it from the surface inward.

From the inside, ethanol-blended pump gasoline does its own work. Ethanol draws in atmospheric moisture and, especially when fuel sits unused for stretches, breaks down the inner liner and leaves gum behind. The result is a line that can be brittle on the outside and swollen or soft on the inside at the same time. Layer in the vibration a big single feeds into the frame and the flex a long six-wheel chassis sees on rough ground, and the failures concentrate right at the bends and barbs.

Confirming How This Sportsman Delivers Fuel

Before you plan the job, be clear about what you are working on. The 2023 Sportsman 570 6x6 is electronically fuel injected. There is no petcock beneath the tank, nothing to rotate to the off position, and no gravity feed to interrupt. Fuel is pushed under pressure by a pump mounted inside the tank, so the hose you intend to remove holds pressure even after the key is off. That drives two requirements: you must relieve system pressure deliberately before opening any fitting, and you need line-clamping pliers on hand to substitute for the shutoff valve this machine does not have. Injected models also tend to use spring or worm-gear clamps at the throttle body end and may use a locking quick-connect coupler at the pump flange.

Warning Signs Worth Acting On

  • Fuel odor lingering around the seat and tank area, most obvious in the minutes right after you shut down
  • A wet spot or small puddle under the mid-chassis after the machine has been parked overnight
  • Hardness, chalkiness, or fine crazing you can see and feel along the hose, particularly at bends
  • Bogging under load, hesitation when you roll into the throttle, or an engine acting starved when the tank is not low
  • Dust caked into a ring at a fitting, which is the signature of fuel seeping and drying repeatedly

Because a pressurized leak can spray a fine mist that evaporates before hitting the ground, a strong smell with no visible puddle is still a real finding on this machine. Do not dismiss it.

Tools, Ventilation, and Common Sense

Collect gloves, eye protection, a drain pan, a sealed fuel-rated container, correctly sized injection-rated hose, fresh clamps, a quick-disconnect release tool, line-clamping pliers, a socket set, a razor knife, and plenty of clean rags. Having it all within reach matters more than it sounds, because once a fitting is open you do not want to walk away.

The safety piece is genuine and short. Work outside or with the door wide open, because gasoline vapor is heavier than air and pools along the floor where it can find an ignition source you forgot about. Shut down heaters, move hot work lights, and keep the area clear of anything with a flame or a spark. Gloves are not vanity either; gasoline pulls the oils straight out of your skin.

Getting the Old Line Out

Relieve pressure first. Pull the fuel pump fuse or relay, crank the starter a few seconds until the engine quits or will not light, key off, then disconnect the battery negative. Remove the seat and the side panels covering the tank and the hose run forward to the throttle body.

Position the pan, cover the joint with a rag, and slide the existing clamp well back along the hose before you disturb the connection. Quick-connects release by pressing their tabs squarely and pulling straight off; prying sideways cracks a collar that has spent years getting brittle. Barbed connections usually need a gentle twist to break the varnish seal that has formed. A hose that will not release should be slit lengthwise and peeled off, which protects the fitting underneath.

Trace the routing carefully. This is a six-wheel-drive chassis, longer than a standard 4x4 utility machine and carrying an additional rear driveline plus extra frame crossmembers, so the line passes through more retainers and tighter clearance points on its way forward. Photos taken before removal save real time on reassembly.

Installation and the Final Leak Check

Cut the new hose to the original length exactly. Slack is not helpful; it invites chafing against the frame or drift toward hot exhaust. Push each end onto its barb until it seats against the shoulder, working entirely dry. Keep grease, oil, and silicone away from every fuel fitting, since lubricant on a sealing face is precisely how pressurized fuel escapes past a properly tightened clamp. If a hose end resists, soften it briefly in hot water instead.

Position new clamps just behind the raised bead and tighten evenly. Where a self-locking quick-connect is used, push until the collar clicks and confirm with a firm tug; no clamp is required or wanted there. Route the hose back into every original clip.

Reinstall the fuse, Reconnect the battery, and cycle the key on and off five or six times without starting. Each cycle pressurizes the circuit so you can inspect both joints while everything is dry, wiping each with a clean rag and looking for transfer. Then start the engine, idle it for several minutes, and check once more under full running pressure before the bodywork goes back on. Bear in mind the filter on this injected 570 sits inside the tank with the pump rather than inline on the hose, so persistent starvation after a clean hose install points to that assembly next.

Related Shopping Categories

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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.