Content Source: 2020 550 Indy 144 Owner’s Manual (9929781 R01) > Maintenance Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Carburetor

The number stamped in the end of the main jet indicates the jet size. The jet installed at the time of manufacture is not necessarily correct for your elevation. It’s your dealer’s responsibility to make sure the correct main jet is installed.
NOTICE
Operating the snowmobile with incorrect jetting can result in serious engine damage. Have your POLARIS dealer perform all carburetor adjustments to ensure all adjustments are done correctly.

Carburetor Adjustments

The frequency at which the carburetors are synchronized or balanced is important. Properly adjusted carburetors can greatly improve engine performance, fuel economy, engine life, and reliability.
If you notice any of the following conditions, the carburetor may need adjustment:
  • Hard starting
  • Poor idle
  • Overheated pistons and cylinder walls
  • Plug fouling
  • Poor engine response to various throttle valve openings

Carburetor Water/Sediment Trap

Most POLARIS snowmobiles contain patented carburetor bowl water/ sediment traps located at the bottom of each carburetor. The trap, consisting of a hose with a plug, should be drained about every 1000 miles (1600 km) and inspected for contamination.
WARNING
When draining the traps, fuel spillage will occur. Always work in a well ventilated area away from anything that may cause the fuel to ignite, such as open flames, sparks, heaters, trouble lights, cigarettes, etc. Review the fuel warnings on Fuel.

Cleaning Procedure

  1. Turn the fuel valve off.
  2. Position a container or shop towels below the plug to catch drained fuel.
  3. Slide the clamp away from the drain plug and remove the drain plug from the sediment tube.
  4. Wipe residue from the plug and reinstall it. Reposition and tighten the clamps.
  5. Repeat the draining procedure for any remaining traps.

Image

© Copyright Polaris Industries Inc. All rights reserved.