Polaris 550 Indy 121, 550 Indy User's Guide
![Polaris 550 Indy 121, 550 Indy manual cover](/images/8d04635fa698b81152ac7364/thumbs/thumb175x175.webp)
The Polaris 550 Indy 121 should have its oil changed every 1000 miles or annually, whichever comes first. Air filters should be checked and cleaned every 500 miles, and spark plugs should be inspected every 1000 miles.
If your Polaris 550 Indy won't start, check the battery connections and ensure they are tight and clean. Verify that the fuel is fresh and the fuel valve is open. Also, inspect the spark plug for signs of wear or fouling.
For the Polaris 550 Indy, it is recommended to use Polaris Blue Synthetic Blend 2-Cycle Oil or an equivalent high-quality synthetic 2-stroke oil.
To adjust the track tension on a Polaris 550 Indy 121, elevate the rear of the snowmobile, loosen the rear axle bolts, and adjust the tension bolts evenly on both sides until the track deflection is within the specified range. Tighten the axle bolts after adjustments.
To store your Polaris 550 Indy, clean the exterior, lubricate moving parts, add fuel stabilizer, remove the battery and store it in a cool, dry place, and cover the snowmobile to protect it from dust and moisture.
Improving fuel efficiency can be achieved by ensuring proper maintenance, including clean air filters, properly gapped spark plugs, and correct track tension. Additionally, avoid aggressive riding and maintain optimal throttle control.
If your Polaris 550 Indy overheats, stop the engine immediately and let it cool down. Check for coolant leaks, ensure the cooling fan is working, and inspect the radiator for blockages. Consult a professional if the issue persists.
To replace the drive belt, remove the clutch guard, release the belt tension by rotating the secondary clutch, slip off the old belt, and install the new belt ensuring it is seated properly in the clutches. Reattach the clutch guard.
Common signs of a worn-out spark plug include difficulty starting the engine, poor fuel economy, engine misfires, and reduced performance. Inspect the spark plug for carbon deposits or a damaged electrode.
To reduce vibration, ensure that the track is properly aligned and tensioned. Check that all engine mounts are secure and in good condition. Adjust the suspension settings to match your riding conditions and preferences.