YAMATIC Pressure Washer Pump 3/4" Shaft Horizontal — 3400 PSI, 2.5 GPM, anodized aluminum replacement kit

YAMATIC's horizontal pressure-washer pump with a 3/4" shaft delivers up to 3400 PSI and 2.5 GPM to restore a compatible gasoline power washer.

If your 6.5–7.0 HP (208–220cc) power washer lost pressure, swapping in this YAMATIC pump can be a cost-effective way to get peak cleaning performance back without buying a new machine. The unit is built from anodized die-cast aluminum with upgraded seals, bearings and pistons for extended life, and it ships as a ready-to-install kit with bolts, siphon tube, shaft key and instructions.

Will this pump fit my engine and mounting pattern?

This pump is designed for horizontal shaft engines with a 3/4" shaft and suits many 6.5–7.0 HP (208–220cc) engines. Confirm the diagonal bolt spacing and shaft size before ordering to avoid incompatibility.

• 3/4" shaft (not compatible with 7/8" shafts)
• Diagonal hole spacing: 3 5/8" (92 mm)
• Hole-to-hole distance: 2 9/16" (65 mm)
• Key width: 3/16"; shaft depth: 2 5/8"

How much cleaning power does this pump provide?

The YAMATIC pump is rated up to 3400 PSI at 2.5 GPM when paired with engines running near 3200 RPM. It performs best in the 3100–3400 PSI window and is suitable for demanding residential and light-commercial cleaning tasks.

• Maximum pressure: 3400 PSI
• Flow rate: 2.5 gallons per minute
• Optimized for ~3200 RPM engine speed
• Works with engines that support 3100–3400 PSI output

What durability and maintenance features does the pump include?

Construction emphasizes longevity: anodized aluminum housing resists corrosion while upgraded pistons, bearings and a dual-seal system minimize leaks. The sealed crankcase eliminates routine oil changes, making maintenance simpler.

• Fully anodized die-cast aluminum housing for corrosion resistance
• Double-seal system to reduce leakage
• Upgraded piston and bearing surfaces for longer life
• Maintenance-free sealed crankcase — no oil changes required

How easy is installation and what accessories are included?

The pump is supplied as a complete replacement kit to help you get back to work quickly. Most users report installation in 5–10 minutes when the mounting and shaft match; simple cold-start features eliminate the need to release pressure before starting.

• Includes siphon tube with filter, mounting bolts, shaft key, instruction booklet
• Simple cold-start design for easier engine starting
• Adjustable unloader valve to set the pressure for engine compatibility
• Quick setup when used with compatible engines and mounts

Who is this for: This YAMATIC 3/4" horizontal shaft pump is aimed at homeowners, maintenance crews and small-business operators who want to restore or upgrade a pressure washer with a compatible 6.5–7.0 HP engine. If your current unit matches the listed bolt pattern and shaft dimensions, this pump offers high pressure, durable construction and a plug-and-play replacement option without the expense of a new machine. If you're unsure about fitment, contact the seller with your engine model and measurements for verification before purchasing.