Pressure Washer Pump, 19 mm Horizontal Shaft, 3400 PSI

Pressure washer replacement pump restores strong cleaning power without replacing your entire machine—delivering up to 3400 PSI and 2.5 GPM for fast driveway, siding, fence, and vehicle washing. Built for horizontal-shaft gas pressure washers with a standard SAE bolt pattern, this rear-outlet pump kit is designed for quick swaps and dependable sealing. The hardened plunger and one-piece pump head help reduce wear and limit water/oil leaks over time.

• Fits horizontal 196–230cc engines with standard SAE bolt pattern and rear outlet orientation


• Delivers up to 3400 PSI max pressure and 2.5 GPM max flow for everyday residential cleaning


• Reduces leaks with a one-piece pump head, metal shaft sleeve, and improved seal protection


• Eliminates oil changes with a maintenance-free crankcase for simpler ownership


• Includes detergent hose, shaft key, bolts, flat pads, and spring washers for a fast install

Keep your pressure washer working at full capability with a direct-fit pump replacement that prioritizes easy installation and consistent performance. Ideal when your current pump loses pressure, leaks, or won’t prime reliably—swap the pump instead of retiring the whole unit. With common garden-hose and M22 connections plus a 3/4" (19 mm) shaft setup, it’s a practical upgrade for many horizontal-shaft washers. Grab yours today and get back to cleaning without downtime.

• Max pressure: 3400 PSI


• Max flow: 2.5 GPM


• Engine type: Horizontal


• Recommended engine output: 6.5–7 HP


• Shaft diameter: 3/4" (19.05 mm)


• Inlet connector: 3/4" NH garden hose


• Outlet connector: M22 x 1.5 (14 mm)


• Inlet/outlet orientation: Rear


• Product size: 8" x 5.5" x 7.6" (20 x 14 x 19.3 cm)


• Product weight: 5.5 lb (2.5 kg)


• In the box: detergent hose, 4 flat pads, 4 spring washers, 4 bolts (UNF 5/16-24 x 1), shaft key (4.78 x 4.78 x 40 mm)