Understanding and Replacing the Fuel Line on a 2017 Can-Am Outlander 850

Shop parts for a 2017 Can-Am Outlander 850 ATV.

The fuel hose on a 2017 Outlander 850 has no wear indicator, throws no code, and gives no obvious sign of its condition from the saddle. It is simply a rubber component living in a hot engine bay and carrying a chemically aggressive liquid. Understanding what breaks it down is the most practical way to judge whether yours is still fit for hard use.

The Chemistry and Heat That End a Hose

Start with heat. The 854cc Rotax V-twin generates real warmth under the bodywork, and every heat cycle pulls more of the plasticizer content out of the hose wall. Rubber that was soft and elastic when the machine was new slowly becomes stiff and glassy, and once it can no longer absorb movement, the normal flex of a chassis working through rough terrain turns that stiffness into surface checks and eventually splits. Riders in dry, low-humidity country see this progress faster, since the surrounding air continually draws moisture out of the material.

Now the chemistry. Ethanol-blended gasoline attracts water and slowly degrades the hose liner from the bore side. That inner surface softens, swells slightly, and begins releasing fine particles into the fuel stream headed for the injectors. Long parked stretches multiply the effect, because standing fuel has time to gum and varnish against a wall already losing integrity. The classic result is a hose failing in two directions at once, hard and cracked outside while soft and shedding inside.

Confirming Injection on This Machine

Your 850 is fuel injected, which sets the rules for the whole job. The pump lives inside the fuel tank, the hose carrying fuel to the engine holds pressure long after the key is off, and there is no petcock anywhere to shut off flow. Relieving pressure replaces closing a valve. The pump module carries the filter element internally rather than leaving an inline canister on the visible hose, and at least one connection is likely a self-locking quick-connect coupler instead of a barb with a worm clamp. Buy hose rated for injection pressure and matched to the original inside diameter.

Symptoms Worth Investigating

  • Raw gasoline smell around the tank and rear fenders, sharpest right after shutdown while pressure remains
  • A wet streak on the skid plate or a small puddle on the floor after the machine has sat overnight
  • Hairline cracking, a chalky gray tone, or a section permanently flattened under a clamp
  • A caked ring of dirt at a fitting from repeated seeping and drying
  • Bogging under load, hesitation as the throttle opens, or the engine acting as though it were nearly out of fuel

A pressurized pinhole can atomize and evaporate without ever making a drip, so treat a persistent smell as evidence even when nothing shows on the ground.

Tools, Supplies, and Working Safely With Gasoline

  • Nitrile or rubber gloves and eye protection, because gasoline strips oils out of skin quickly
  • A shallow drain pan plus a sealed, fuel-rated container
  • Injection-rated replacement hose in the correct diameter
  • New clamps in the matching style, and a quick-disconnect release tool if your coupler needs one
  • Line-clamping pliers, since no fuel valve exists on this model
  • Hand tools for the seat, racks, and side panels, a razor blade, and clean rags

Ventilation is the real safety measure here. Gasoline vapor is heavier than air and collects at floor level, so work outdoors or with the garage door wide open instead of relying on an overhead window. Shut off heaters and pilot lights, keep every spark source out of the area, and let a warm exhaust cool before your hands go near it.

Removing the Existing Line

Relieve pressure first. Pull the fuel pump fuse or relay, crank the engine for a few seconds until it stalls, turn the key off, then disconnect the battery negative cable. Remove the seat and enough side plastic to expose the tank and the hose run toward the throttle body. Position your drain pan and keep a rag over each joint as you open it, because a depressurized line still surrenders a slug of fuel.

Slide clamps well clear along the hose before you disturb the fitting. Locking couplers need their tabs pressed squarely and a straight pull; prying at an angle cracks collars that have hardened with heat and time. Rotate the hose on its barb to break any varnish bond rather than hauling on it, and if an end refuses to release, slit it lengthwise and peel it off so the fitting stays intact. Photograph the routing before the last retainer comes loose. As a 4x4, this Outlander packs a front differential and additional frame structure into the same space, so the hose passes through more guides and clearance points than a two-wheel-drive quad, and matching that path matters on reassembly.

Installation and Confirming a Dry System

Cut the new hose to the original length rather than leaving extra. Slack rubs frame tubes and can wander toward hot exhaust. Push each end fully onto its barb, working dry, with no grease, oil, or silicone anywhere on the sealing surfaces, because lubricant gives pressurized fuel a route out past the clamp. A few seconds in hot water softens a tight end enough to slide on. Place new clamps just behind the raised bead at each fitting and tighten evenly instead of burying them in the rubber. Self-locking quick-connects get pushed until they click and then tugged hard to confirm the latch, with no clamp added. Feed the hose back through every original clip.

Reinstall the fuse, Reconnect the battery, and cycle the key on and off several times without cranking. Each cycle runs the pump and pressurizes the circuit, letting you inspect both joints with a clean rag while the machine sits still. Then start the twin, let it idle, and check once more with the engine vibrating everything. After several dry minutes, reinstall the bodywork and seat, and keep the first ride close to home. Lingering soft fuel delivery after a clean install points at the in-tank pump and filter module rather than the hose you just fitted.

Related Shopping Categories

Shop Fuel Lines for a 2017 Can-Am Outlander 850 ATV.

Shop Fuel Line Clamps for a 2017 Can-Am Outlander 850 ATV.

Shop Petcocks for a 2017 Can-Am Outlander 850 ATV.

Shop Fuel Filters for a 2017 Can-Am Outlander 850 ATV.

Shop Fuel Stabilizer for a 2017 Can-Am Outlander 850 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.