Polaris Sportsman 550 XP, EPS, 850 XP, 850 Owner's Manual

To change the oil on a Polaris Sportsman 550 XP, first warm up the engine to ensure oil flows freely. Then, turn off the engine and place the ATV on a level surface. Remove the drain plug and allow the oil to completely drain. Replace the drain plug and remove the oil filter. Install a new oil filter, and refill with the recommended type and amount of oil. Finally, check the oil level with the dipstick and add more oil if necessary.

If your Polaris Sportsman 850 is having starting issues, check the battery connections to ensure they are clean and tight. Verify that the battery is fully charged. Inspect the spark plug for wear or fouling and replace if necessary. Check the fuel system for blockages or stale fuel. Finally, ensure that the engine stop switch is in the "run" position.

The recommended maintenance schedule for a Polaris Sportsman 850 XP includes: checking oil levels before each ride, changing the oil and filter every 50 hours of operation, inspecting the air filter every 25 hours and replacing as needed, checking tire pressure before each ride, lubricating all grease fittings every 50 hours, and inspecting brake pads and fluid levels regularly.

To adjust the suspension on a Polaris Sportsman with EPS, locate the suspension adjustment knob on each shock absorber. Turn the knob clockwise to increase stiffness or counterclockwise to decrease stiffness. Ensure both sides are adjusted equally for balanced handling. Test the ride and make further adjustments as necessary to suit your riding conditions and preferences.

If your Polaris Sportsman 550 XP overheats, immediately stop riding and let the engine cool. Check the coolant level and add coolant if necessary. Inspect the radiator for debris and clean it if needed. Ensure the cooling fan operates properly. Avoid running the engine for extended periods at low speeds or idling in hot conditions. If the problem persists, consult a professional technician.

To improve fuel efficiency on your Polaris Sportsman 850, ensure the air filter is clean, as a dirty filter can reduce efficiency. Maintain proper tire pressure to decrease rolling resistance. Use the recommended grade of fuel and engine oil. Avoid aggressive acceleration and maintain a steady throttle when riding. Regular maintenance, such as timely oil changes and spark plug replacements, also contributes to better fuel efficiency.

To replace the drive belt on a Polaris Sportsman 850 XP, first remove the clutch cover bolts and take off the cover. Use a clutch tool to open the secondary clutch and remove the old belt. Install the new belt by placing it around the primary clutch and then onto the secondary clutch, ensuring it is seated properly. Reinstall the clutch cover and tighten the bolts securely.

Common issues with EPS on Polaris Sportsman models include intermittent power loss, unusual noises when steering, or increased steering effort. These can be caused by electrical faults, low battery voltage, or physical damage to the EPS system. Check the battery and electrical connections, and inspect the EPS motor and steering components for damage. Seek professional assistance if needed.

To winterize your Polaris Sportsman 850, clean the ATV thoroughly and inspect it for any needed repairs. Change the oil and filter, and add a fuel stabilizer to the gas tank. Run the engine for a few minutes to circulate the stabilizer. Remove the battery and store it in a cool, dry place. Lubricate all moving parts and cover the ATV to protect it from dust and moisture.

To check and adjust the valve clearance on a Polaris Sportsman 850, remove the seat and fuel tank to access the valve cover. Remove the valve cover to expose the valves. Rotate the crankshaft to position the cam lobes away from the valves. Use a feeler gauge to measure the clearance and compare it to the specifications. If adjustment is needed, use the appropriate tools to adjust the valve tappets. Reinstall all components after adjustment.