Polaris 2003 Universal Snowmobiles - Manual (Page 130)

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MAINTENANCE
General Maintenance
General Carburetor Information
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.
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, the carburetor may need adjustment:
D
Hard starting
D
Poor idle
D
Overheated pistons and cylinder walls
D
Plug fouling
D
Poor engine response to various throttle valve openings
Carburetor adjustments should be performed only by a
knowledgeable service technician at an authorized Polaris
dealer, using the proper tools, procedures and specifications.
CAUTION