2002 Polaris Universal Snowmobile Owners Manual - Page 87

OPERATION Carburetion Proper carburetor adjustment is critical. A lean mixture (too much air, too little fuel) may result in piston burning, bearing failure, or complete engine failure. A rich mixture (too much fuel, too little air) may foul plugs and cause generally poor engine performance. A lean mixture may be caused by things like fuel line restrictions, foreign matter in the carburetor, or clogged fuel filters. A rich mixture may be caused by snow build-up on the pre-filter in the air intake system. Either condition may be caused by improper carburetor adjustment. All carburetors have been preset at the factory for adequate fuel supply. Higher altitude operation may require different adjustments and settings. NOTE: RMK models are preset to operate at altitudes of 6000-9000 feet above sea level. See page 118 for more information. Your dealer has the training and tools required to perform any adjustments for you. WARNING Carburetor adjustments must be performed by your dealer, since mistakes may result in possible operator safety hazards as well as serious engine damage. 85