Polaris Trail Boss 330 - Manual (Page 46)

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OPERATION
Starting the Engine
Starting a Warm Engine
Warm engines do not normally require the use of the choke. Excessive
use of the choke can cause the spark plug to become wet fouled.
1. Position the vehicle on a level surface with the transmission in
neutral.
2. Lock the parking brake, turn the fuel tank valve to ON, sit on the
vehicle, and turn the engine stop switch to RUN.
3. If the engine has cooled to a point where it does not readily start,
intermittent use of the choke (pulled half way out) may be
necessary.
4. If the engine is over-choked when warm, depress the throttle lever
fully while cranking to aid in starting.
5. Release the throttle lever immediately after the engine starts. If the
engine does not start and all conditions are favorable, change the
spark plug and try again.