Pressure Washer Pump Assembly 317991GS

Basic information

• Part name: Pressure washer pump
• Manufacturer: Briggs & Stratton
• Category: Pressure washer pump assemblies
• Primary function: Pressurizes water supplied from the garden hose for high-pressure cleaning.

Installation & compatibility

• Compatible models: Fits select Briggs & Stratton models; confirm compatibility using your model s parts diagrams
• Installation difficulty: Difficult; requires removing the existing pump from the engine and reconnecting water and pressure lines
• Tools required: Socket set, wrench set

Additional information

This pressure washer pump, part number 317991GS, mounts to the engine and draws in water from the supply hose, then pressurizes it for delivery through the high-pressure hose and spray wand.

If the pressure washer has little or no pressure, leaks water from the pump housing, or makes unusual noises during operation, the pump may be worn or damaged. Visible cracks, oil leaks, or water leaking from seals are common signs of failure.

Disconnect the spark plug wire on gas models or unplug electric models before starting the repair. Shut off the water supply and relieve system pressure, then remove mounting bolts and disconnect hoses carefully. Install the replacement pump securely and tighten all connections before restoring power and water supply.