Abstract: Pressure washer nozzle assemblies that include multiple orifices that each generate a respective spray pattern or are suitable for alternate applications. The nozzle assemblies include a flow body that is constructed to be associated with a wand and a control or controller that is movably associated with the flow body. Manipulation of the controller relative to the flow body effectuates different flow configurations that are each associated with selectively fluidly connecting alternate orifices associated with the nozzle assembly with the fluid flow delivered via the wand.

Abstract: A pressure washer device or system that includes various control protocols associated providing an engine powered pressure washer that is convenient to operate and configured for multiple desired uses. The control protocols are preferably configured to maintain the operational integrity of the engine and pump of the pressure washer if undesirable operating conditions, such as a low oil level condition or low water flow conditions, occur during use of the pressure washer.