YAMATIC Pressure Washer Pump 3/4" Shaft Horizontal — 3200 PSI, 2.5 GPM for 6.5–7 HP Engines

YAMATIC’s horizontal pressure-washer pump replaces worn units with a 3/4" shaft design rated up to 3200 PSI and 2.5 GPM for heavy-duty cleaning performance.

Swap a failing pump instead of buying a whole new machine: this YAMATIC horizontal pump is built for 208–220cc (6.5–7.0 HP) engines and tuned to deliver top performance in the 2800–3200 PSI range at 3200 RPM. It includes a maintenance-free crankcase, an adjustable unloader, thermal relief protection, and hardware needed for a quick installation so you can get your pressure washer back to work fast. Note: incompatible with 7/8" engine shafts—measure your shaft before ordering.

How does this pump restore a worn pressure washer?

Replacing the pump renews the pressure output and flow of a tired washer, often at a fraction of the cost of a new unit. The YAMATIC pump is matched to common small-engine washers and supplies steady pressure for typical cleaning jobs.

• Rated max: 3200 PSI at 2.5 GPM and 3200 RPM.
• Designed for 208–220cc engines (6.5–7.0 HP).
• Fits many Simpson, Honda, Karcher, Troy-Bilt and similar models.
• Not compatible with 7/8" engine shafts; shaft size is 3/4".

What durability features keep this pump working longer?

The pump uses a double-seal arrangement, upgraded piston surfacing and reinforced bearings to resist wear and leakage. These improvements and the thermal relief valve reduce overheating and extend service life compared with basic replacement pumps.

• High-performance double seal to minimize leaks.
• Improved piston and bearing finishes for longer running hours.
• Thermal relief valve (TRV) protects during bypass operation.
• Estimated service life significantly longer than many stock pumps.

How easy is installation and routine use?

YAMATIC supplies the key parts to install and start quickly: mounting bolts, shaft key, siphon tube with filter and an instruction booklet. The crankcase is maintenance-free so you won’t need oil changes, and a built-in cold-start feature simplifies restarts without pressure release.

• Quick setup—typically 5–10 minutes with included hardware.
• Maintenance-free crankcase—no routine oil changes required.
• Includes siphon tube, filter, bolts, shaft key, and manual.
• Cold-start friendly—no need to relieve pressure before starting.

Will this pump work with my make and model?

The pump is compatible with many common models and part numbers from popular brands but requires a 3/4" engine shaft and support for 3200 PSI/2.5 GPM. If you are unsure of fitment, provide engine and pump details or contact the seller for confirmation before purchasing.

• Compatible replacements listed for Simpson, Honda, Karcher, Troy-Bilt and AR models.
• Key dimensions: diagonal bolt spacing 3 5/8", hole-to-hole 2 9/16".
• Shaft key width 3/16" and shaft depth 2 5/8".
• Warning: will not fit engines with a 7/8" shaft.

Who is this for: the YAMATIC 3/4" horizontal pump is aimed at DIYers, mechanics and small-business operators who want to restore or upgrade a gasoline pressure washer with a durable, higher-performance pump. It’s ideal when the engine is sound but the pump leaks, loses pressure, or fails; confirm shaft size and mounting dimensions to ensure compatibility before ordering.