Polaris Youth Outlaw 90, Sportsman 90 Owner's Manual
![Polaris Youth Outlaw 90, Sportsman 90 manual cover](/images/eccee25d0fe739ef184a93d7/thumbs/thumb175x175.webp)
To break in a new Polaris Youth Outlaw 90 engine, avoid prolonged idling and vary the engine speed. For the first 10 hours, do not operate at full throttle and avoid aggressive acceleration or deceleration.
For the Polaris Sportsman 90, use Polaris PS-4 Full Synthetic 4-Cycle Engine Oil. It is specifically formulated for Polaris ATVs and will ensure optimal performance and protection.
Change the oil in your Polaris Youth Outlaw 90 after the first 10 hours of use and then every 20 hours or six months thereafter, whichever comes first.
The recommended tire pressure for the Polaris Sportsman 90 is 4 psi (27.5 kPa) for both the front and rear tires. Always check and adjust tire pressure when the tires are cold.
To clean the air filter, remove the air filter cover, take out the filter, and wash it with warm soapy water. Rinse thoroughly and allow it to dry completely before reinstallation.
If your Polaris Sportsman 90 won't start, check the battery charge, fuel level, and ensure the kill switch is in the 'run' position. Additionally, inspect the spark plug for fouling and replace it if necessary.
To adjust the chain tension, loosen the rear axle carrier bolts, then turn the chain adjuster bolts evenly until the chain has approximately 1/2 inch of slack. Tighten the axle carrier bolts to secure the position.
Overheating can be caused by a blocked radiator, low coolant level, or a faulty thermostat. Check and clean the radiator, ensure coolant levels are adequate, and test the thermostat for proper operation.
For off-season storage, clean the ATV thoroughly, change the oil, and fill the gas tank with stabilized fuel. Disconnect the battery and store it in a cool, dry place. Cover the ATV to protect it from dust and moisture.
Before each ride, check the tire pressure, oil level, brakes, throttle operation, and lights. Ensure all nuts and bolts are tight and inspect for any leaks or damage.