Hourleey 3/4" Shaft Horizontal Pressure Washer Pump — 3400 PSI 2.5 GPM Replacement Kit, Pre-Filled

Hourleey's 3/4" shaft horizontal pressure washer pump delivers a ready-to-install 3400 PSI, 2.5 GPM replacement designed to revive compatible gas pressure washers quickly and reliably.

If your gas pressure washer lost pressure or developed a faulty pump, this Hourleey horizontal pump offers a direct, cost-effective option to restore performance without buying a new machine. Built for a broad set of cleaning chores—driveways, decks, siding, vehicles, and heavy grime—the unit is pre-filled with oil, includes installation hardware, and uses a standard 3/4" shaft and garden hose inlet to match many popular power washer platforms.

How does this pump fit my existing pressure washer?

The Hourleey pump uses a standard 3/4" drive shaft and common inlet/outlet fittings to make replacement straightforward for many gas washers. Compatibility was considered for mainstream brands so the swap is often plug-and-play with minimal modification.

• 3/4" shaft accepts typical couplings and keying used on many engines.
• 3/4" NH garden hose inlet for straightforward water supply connection.
• M22 threaded high-pressure outlet matches common hoses and guns.
• Works with a range of models from Simpson, Ryobi, Honda and similar gas washers.

What comes in the box and how simple is installation?

The pump is supplied as a near-complete kit so you can finish the swap quickly. Items include the pump pre-filled with oil, a detergent hose, mounting hardware, a shaft key and simple instructions to get you back to work in minutes.

• Kit includes 4 bolts (UNF5/16-24 x 1), 4 flat pads, 4 spring washers, and a shaft key.
• Pre-filled crankcase—no initial oil fill required and no routine oil changes needed.
• Cold-start friendly design that doesn’t require pressure release before engine start.
• Step-by-step manual that walks through mounting, hose connections and safety checks.

What performance and durability features should I expect?

Designed for durability in demanding cleaning tasks, the pump includes features aimed at reducing wear and preventing leaks so it keeps delivering consistent pressure. Internal improvements extend seal and plunger life while external parts protect against common failure points.

• Rated 3400 PSI at 2.5 GPM for heavy-duty cleaning tasks.
• One-piece pump head and improved plunger design for better sealing and longer life.
• Double seal system and metal shaft sleeve to minimize oil and water leakage.
• Thermal relief valve to prevent overheating when the pump is in bypass.

Who is this for: If you own a gas-powered pressure washer that originally supported roughly 3400 PSI and 2.5 GPM, and you want to repair rather than replace the entire machine, the Hourleey 3/4" shaft horizontal pump is a practical, maintenance-light replacement. It suits DIYers, landscapers, contractors, and homeowners who need a robust pump compatible with mainstream brands like Simpson, Ryobi and Honda. Choose this pump when you want a straightforward installation, reduced downtime, and a component built to resist leaks and wear without extra oil-handling or complicated setup.