Pressure washers including jet pumps

An electric pressure washer, comprising:

• an electric motor;
• a power cord for supplying electricity to the electric motor;
• a water pump coupled to the electric motor, the water pump including a pump inlet for receiving a fluid from a common fluid source and a pump outlet for supplying a pressurized primary fluid;
• a jet pump including a primary fluid inlet fluidly coupled to the pump outlet, a secondary fluid inlet configured to receive the fluid from the common fluid source, and a fluid outlet;
• and
• a spray gun configured to be fluidly coupled to the fluid outlet of the jet pump, the spray gun including a spray gun outlet having a variable effective flow area adjacent a downstream end of the spray gun for providing an output fluid flow from the spray gun;
• a flow control valve movable between an open position and a closed position, wherein the flow control valve allows the fluid to exit the spray gun in the open position and prevents the fluid from exiting the spray gun in the closed position;
• wherein, in operation, a first effective flow area of the spray gun outlet creates a first back pressure at the jet pump, thereby implementing a high pressure operating mode in which the pressurized primary fluid flows through the jet pump and exits through the fluid outlet of the jet pump, wherein the pressurized primary fluid exits the spray gun as the output fluid flow;
• and
• wherein, in operation, a second effective flow area of the spray gun outlet that is greater than the first effective flow area creates a second back pressure less than the first back pressure at the jet pump, thereby implementing a high flow operating mode in which the pressurized primary fluid flows through the jet pump and entrains a secondary fluid supplied through the secondary fluid inlet from the common fluid source so that the secondary fluid also flows through the jet pump, resulting in a combined fluid flow of the primary fluid and the secondary fluid exiting through the fluid outlet of the jet pump, wherein the combined fluid flow exits the spray gun as the output fluid flow;
• wherein a fluid flow is variably adjusted using the variable effective flow area of the spray gun outlet to select between the high flow operating mode and the high pressure operating mode;
• and
• wherein in the high flow operating mode the output fluid flow has a flow rate at least double the flow rate of the output fluid flow in the high pressure operating mode.