History

• Manufacturers changed their labeling tactics for outdoor yard equipment in 2007. Previously, gas-powered blowers were differentiated by their power value, measure in horsepower. Currently, manufacturers use displacement values in cubic centimeters.
  
  

Identification

• Displacement refers to the size of the engine's combustion chamber. As a general rule, a larger displacement value designates a bigger engine for the gas blower. More power and speed emanates from a larger combustion chamber.
  
  

Considerations

• The engine's configuration plays a part in determining gas blower power. More power is possible from an engine built with overhead valves -- as opposed to side valves -- regardless of the displacement value. Verify all specifications before purchasing a gas blower to ensures that it supplies the power needed for a specific yard application.