Polaris 2000 Universal Snowmobile - Manual (Page 66)

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MAINTENANCE
General Carburetor Information
The number size stamped in the end of the main jet indicates the jet size which was
installed at the time of manufacture.
The installed main jet is not necessarily correct for your elevation.
It is the Polaris dealer’s responsibility to ensure that the correct main jets are
installed in each machine for your area of operation.
WARNING
Carburetor adjustments should be performed only by a knowledgeable service
technician at a Polaris servicing dealer using the proper tools, procedures and
specifications.
Carburetor Adjustments
Proper carburetor adjustments include the following:
D
Carburetor component changes for specific altitude and ambient temperatures;
D Choke adjustment and synchronization;
D Air screw settings, if applicable;
D Idle RPM adjustments;
D Equalizing air flow at idle;
D Equalizing air flow at off idle;
D Throttle safety switch checks and servicing;
D Throttle block to throttle flipper clearance adjustment; and
D Oil pump lever and cable adjustment, where applicable.
The frequency at which the carburetors are synchronized or balanced is important.
Properly adjusted carburetors can greatly improve engine performance, fuel econ-
omy, engine life and reliability.
Improperly adjusted or unsynchronized carburetors can lead to one or more of the
following:
D
Hard starting.
D Poor idle.
D Overheated pistons and cylinder walls.
D Plug fouling.
D Poor engine response to various throttle valve openings.