337.25 AIR CLEANER REQUIRED.
   (a)   No person shall operate a motor vehicle with an internal combustion engine unless the carburetion system of the vehicle is protected with an air filter, a flame arresting device, or any other accepted method of protection that is adequate for this purpose.  If the original device or system is replaced, it shall be replaced with one that is equal to or better than the original equipment.
   (b)   This section does not apply to a person doing automotive repair work on a motor vehicle that necessitates this device being removed while the work is performed.
   (c)   Whoever violates this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.