Pressure Washer Pump, 7/8 in Vertical Shaft, 3100 PSI, 2.5 GPM

Pressure washer replacement pump restores strong, consistent water pressure so you can get back to fast outdoor cleaning without replacing the whole machine. Built for 7/8 in vertical shaft engines with a standard SAE bolt pattern, it delivers up to 3100 PSI and 2.5 GPM for driveways, siding, fences, and vehicles. Cast aluminum construction supports reliable performance, while the maintenance-free crankcase eliminates oil changes.

• Delivers up to 3100 PSI and 2.5 GPM for quicker rinsing and heavier soil removal (2600 PSI recommended for longer life).


• Fits 7/8" vertical shaft, front water inlet setups on many 180–196cc 6.5–7 HP engines with a standard SAE bolt pattern.


• Includes 5 spray nozzles to switch from wide fan rinsing to concentrated blasting for tough spots.


• Reduces upkeep with a maintenance-free crankcase design—no oil changes required.


• Resists corrosion with cast aluminum pump body engineered for up to 150 hours of continuous operation.

When your washer loses pressure, surges, or won’t build consistent output, a replacement pump is often the fastest fix. This kit is designed for quick swap-in compatibility with common vertical-shaft gas engine configurations and includes the accessories needed to dial in spray patterns and keep tips clear. Confirm your shaft diameter and inlet/outlet connections before ordering to ensure a smooth install. Grab yours today and put your pressure washer back to work.

• Material: Cast aluminum


• Max/Recommended Pressure: 3100 / 2600 PSI


• Max Flow Rate: 2.5 GPM (9.5 L/min)


• Shaft Diameter: 7/8 in (22.2 mm), vertical orientation


• Compatible Engine Power: 6.5–7 HP (approx. 180–196cc), SAE bolt pattern


• Inlet Connector: 3/4" NH garden hose; Water inlet direction: front


• Outlet Connector: M22 x 1.5 (14 mm)


• Net Weight: 7.47 lb (3.39 kg)


• In the box: 5 nozzles, nozzle cleaning pin, siphon tube, 2 shaft keys, M8 washers, M8 bolts & nuts