EZJOB 3100PSI Pressure Washer Pump Replacement — Horizontal 3/4" Shaft, 2.5 GPM, Pre-Filled Oil

EZJOB 3100PSI Horizontal 3/4" Shaft Pressure Washer Pump is a direct-replacement axial pump rated up to 3100 PSI for 6.5–7 HP horizontal shaft gasoline engines.

If your pressure washer has lost spray pressure, is sputtering, or the pump has visible wear, this EZJOB replacement pump restores performance without buying a whole new unit. Built for horizontal 3/4" shafts on small gasoline engines (180–196cc), the unit delivers up to 3100 PSI at 2.5 GPM and includes practical service features such as pre-filled oil, a thermal relief valve and common engine flange compatibility.

How will this pump improve my washer’s cleaning power?

Replacing a worn or leaking pump with this EZJOB unit brings your machine back to its designed output range of roughly 2800–3100 PSI, giving stronger, more consistent spray and shorter cleaning time. The axial design suits typical consumer gas washers and restores force on stubborn dirt and stains.

• Rated up to 3100 PSI and 2.5 GPM for reliable cleaning strength
• Balanced output for driveways, vehicles, decks and siding
• Reduces run-time and repeat passes when pressure was low

Will this pump fit my pressure washer engine?

This pump fits horizontal gas engines with a 3/4" shaft and common SAE flange patterns used on 180–196cc (about 6.5–7 HP) consumer engines. Confirm your original pump’s mounting dimensions, shaft size and expected operating PSI before ordering to ensure compatibility.

• Fits 3/4" horizontal keyway shafts only
• Compatible with many 6.5–7 HP, 180–196cc horizontal engines
• Includes SAE gas engine flange and standard M22 outlet thread

What maintenance or installation features make this pump easier to use?

The EZJOB pump ships pre-filled with oil and uses a double-seal design so you can install and run without an initial oil change. It also includes an unloader and thermal relief valve to protect the pump during operation and to simplify typical replacement tasks.

• Pre-filled oil for immediate use and up to 150 hours running time
• Thermal relief and unloader valves to prevent overheating and pressure spikes
• Die-cast aluminum housing for corrosion resistance and lighter weight

What parts and connections come with the pump?

The pump arrives with the fittings and mounting hardware most homeowners and DIY mechanics need to swap units quickly. It matches standard inlet/outlet fittings and includes the common copper nut and keyway that fit consumer-grade engines.

• M22 threaded outlet and 3/4" NH-inlet copper nut included
• Unloader, EZ easy-start valve, thermal relief valve provided
• Keyway stock and SAE flange for common engine mounting

Who is this for? This EZJOB replacement pump is intended for homeowners, property managers and DIY mechanics who own a gasoline-powered pressure washer with a horizontal 3/4" shaft and who want a cost-effective repair option. It’s ideal when the original pump shows reduced pressure, leaking seals or inconsistent spray performance and you want a straightforward swap that restores near-factory cleaning power without buying a new machine. Always verify shaft size, mounting pattern and engine power to confirm fit before purchase; working pressure will depend on your washer’s engine output.