2000 Polaris Indy 500 / 600 snowmobile service manual, Page 36Get this manual
MAINTENANCETUNE UP Intake Filter The intake foam filter limits snow ingestion into the intake systemWhen operating in loose powder snow, check top of foam filter periodically to remove any accumulation of snowCAUTION: Do not operate machine with the intake filters removedThis can cause carburetor icing resulting in poor fuel economy or carburetor malfunction1 1