Renewing the Fuel Line on a 2019 Polaris Sportsman Touring 850 SP

Shop parts for a 2019 Polaris Sportsman Touring 850 SP ATV.

Buy the right hose and this repair goes smoothly on a 2019 Sportsman Touring 850 SP. Buy generic rubber tubing off a shelf and you will be redoing it, possibly with a fuel leak in between. Preparation is where this job is won, so start by getting the parts and the workspace correct.

Assembling the Right Materials

Line all of this up before a fastener moves:

  • Nitrile or rubber gloves, because gasoline strips skin oils in seconds and soaks straight through cloth
  • An approved sealed container for the fuel you capture, plus a shallow pan for drips
  • Hose rated specifically for fuel-injection pressure in the original inside diameter, cut slightly long for trimming
  • New clamps of the correct pattern rather than reused originals that have lost their spring
  • A quick-disconnect release tool if your tank fitting uses a locking collar
  • Line-clamping pliers, which take over the job a petcock would do on a carbureted machine
  • Sockets, a plastic trim tool, a good stack of rags, and a sharp razor blade

The pressure rating is the detail that trips people up. Carburetor-grade hose is designed for gravity or low-pressure feed and will balloon, weep, or split on a pressurized circuit. Match the inside diameter too, since oversized hose will never seal correctly on the barb no matter how tight the clamp.

The Fuel System on This Machine

The 2019 Touring 850 SP is fuel injected. There is no petcock to shut off and no float bowl to drain, because an electric pump inside the tank feeds a pressurized line forward to the throttle body and that line holds pressure long after shutdown. Bleeding the pressure electrically is the required first move, not an optional precaution. Also worth noting: the fuel filter is built into the in-tank pump module, so the hose you are replacing carries no filter you can service from outside.

Gasoline Safety and Airflow

Fuel vapor is heavier than air and settles at floor level, exactly where you are working when you reach under the front of the quad. An open window at head height does almost nothing for that. Roll the machine outdoors when the weather permits, or raise the garage door completely and keep it open for the duration of the job. Extinguish water heater pilots, unplug battery chargers, and set aside grinders and any other spark source before you open the first fitting. Keep captured fuel sealed rather than sitting in an open pan evaporating around you, and have a suitable extinguisher within reach.

How Hose Reaches the End of Its Life

Fuel line fails chemically, not from mileage. Plasticizers in the rubber keep it pliable, and heat cycling from the 850 twin drives them out over the years. Soft, springy hose becomes firm, then glassy, and once it loses compliance the flex it used to absorb turns into cracks at the bends and just behind each clamp. Dry, arid climates accelerate this by drawing moisture out of the hose wall and hardening it from the surface inward. From the other direction, ethanol-blended fuel absorbs moisture and slowly degrades the inner liner, which matters most when the machine sits for months with fuel standing in the hose.

Confirming the Hose Is Your Problem

Inspect before you replace. A gasoline smell around the seats right after shutdown is usually the first clue, followed by a damp stain on the skid plate or a dust-caked ring at a fitting where fuel has been seeping and evaporating. Pinch along the hose looking for a rigid, chalky, or crazed section that no longer springs back. From the seat, watch for bogging when the throttle opens with a passenger and cargo aboard, a lean stumble at steady speed, or a sense of fuel starvation at higher rpm. Because pressurized fuel often atomizes before it drips, an odor over a dry floor is still worth a full inspection.

Old Hose Out, New Hose In

Relieve pressure by pulling the fuel pump fuse or relay, cranking the engine until it quits, switching the key off, and disconnecting the battery negative terminal. Both seats and the adjacent panels come off so you can follow the run from the tank flange to the throttle body. The two-up Touring chassis is longer than a standard Sportsman, so expect a longer hose and more retaining clips, and because this is an On-Demand AWD machine, the routing works around front driveline hardware and extra frame structure. Photograph each clip first.

Slide the pan into place and cover each joint with a rag before opening it, since a bled line still holds fuel. Push clamps well back along the hose before touching the barb. Quick-connect couplers release when the tabs are squeezed squarely and the fitting is pulled straight off; angled prying cracks aged plastic. Varnished hose ends should be slit lengthwise and peeled off rather than twisted.

Cut the new hose to the original length so nothing chafes on a frame edge or drifts into hot exhaust shielding. Seat each end fully onto its barb, dry, with no grease, oil, or silicone anywhere near the sealing surface, since lubricant there is precisely how pressurized fuel escapes. Warm water eases a tight fit. Position new clamps just behind the raised bead on each fitting and tighten evenly. A self-locking quick-connect should click and hold against a firm tug with no clamp added. Restore every original clip so the hose sits where it belongs.

Verifying Before the First Ride

Reinstall the pump fuse, Reconnect the battery, and cycle the key on and off several times without cranking so the pump pressurizes the line. Inspect both joints while the engine is cold and still, wiping each with a clean rag and watching for fuel forming. Then start the twin, let it idle, and inspect again with everything hot and vibrating. Only after several minutes of confirmed dry running should the bodywork and seats go back on. If fuel delivery still disappoints with a new hose in place, turn your attention to the in-tank pump and filter module.

Related Shopping Categories

Shop Fuel Lines for a 2019 Polaris Sportsman Touring 850 SP ATV.

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Shop Petcocks for a 2019 Polaris Sportsman Touring 850 SP ATV.

Shop Fuel Filters for a 2019 Polaris Sportsman Touring 850 SP ATV.

Shop Fuel Stabilizer for a 2019 Polaris Sportsman Touring 850 SP 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.