Polaris 2009 99 Ranger - Manual (Page 97)

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MAINTENANCE
WARNING
Do not run the engine in a closed area. Exhaust gases contain carbon
monoxide; a colorless, odorless, poisonous gas. Breathing exhaust
gas leads to carbon monoxide poisoning, asphyxiation and death.
Bolt and Nut Tightening
Tightness of the bolts, nuts and other fasteners should be checked by an autho-
rized Polaris dealer in accordance with the Periodic Maintenance Chart.