Compressed Natural Gas (CNG) Engines
Warning: Compressed natural gas is highly flammable. When inspecting or servicing a vehicle, avoid causing sparks or using arcing switches and equipment. Extinguish cigarettes, pilot lights, flames, or other sources of ignition. Failure to perform these actions or to take other precautions could lead to the ignition of the natural gas, which could cause serious bodily injury, death, or severe property damage.
If the vehicle runs out of fuel, park on a level location away from traffic. Restart the engine after adding at least 30 psi (207 kPa) of fuel.
Notice: Do not crank the engine for more than 30 seconds at a time. Wait two minutes after each try to allow the starter to cool. Failure to do so could cause starter damage.