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Koshin Pump 2 inch Honda Semi-Trash

  • Model Number:


  • Product Name:
    Koshin Pump 2 inch Honda Semi-Trash
  • Manufacturer:
  • Series (9 Models):
4-Cycle GX120 4HP 10,000GPH
Model Number
Koshin Pump 2 inch Honda Semi-Trash STH-50X

Koshin STH-50X

Koshin Semi-Trash Pump 2 inch, Koshin Pump with Honda engine . STH-50X (old SEH-50T) All aluminum die cast pump housing, with CI impeller and volute for lightweight and portability along with long life internal parts. Cast Iron impeller and volute are premium Spheroidal Graphite Cast Iron. This provides much greater wear resistance than ordinary and less expensive plain cast iron. Koshin is the ONLY pump manufacturer to use this high grade material. Metal Carry handle and base. Honda GX120 4-cycle engine. 4-Cycle engine so NO mixing gas. Use standard automotive gasoline. Silicon carbide SiC seals are 2 times harder, 15% tougher, and 50% stronger than common ceramic seals.

Honda powered water pump for construction, golf course, environmental remediation, horizontal drilling and industrial dewatering. Utilities, manhole and vault draining, marine, Landscape irrigation, hydro-seeding, mobile plant watering. Seal coating machines to seal-coat driveways or small parking lots. Turbo hydroseeder turf seed. Asphalt Seal-coating Coal Tar Sealer for blacktop driveways.

Honda engine is 118cc, .66 ga. gas tank providing 2.5 Hrs run time.

With great experience and over 40 years of tradition KOSHIN produces the highest quality water pumps. KOSHIN brand have been ranked no 1 in the world by numerous professionals.

Honda engine Includes low oil sensor. Sturdy steel roll cage included. Other 2" trash pumps

Do not be fooled by imitation "industrial" pumps sold elsewhere. The pump quality is not the same and as with any pump parts will be needed and PumpBiz stocks parts to all the pumps we sell and support. These are the same pumps used by many rental stores, so they have proven themselves many times over. STH50X

Pumps out a 10' D by 4' W manhole in about 8 minutes. It is small and light which helps with space limitations in service trucks.

More Information
Model Number STH-50X
Series Semi-Trash Pump
Max Flow (GPM.) 158
Max Flow GPH 9480
TDH Maximum (Ft) 95
TDH Maximum (PSI) 41
Horse Power (HP) 3 1/2
Horsepower (IE .5, 1, 1.5, 20) 3.5000
Inlet Connection Type MNPT
inlet size 2"
Inlet (In.) 2
Outlet Connection Type MNPT
Outlet (In.) 2
Wetted Materials Aluminum, Ductile Iron
Elastomers / O-ring Buna-Nitrile
Motor Gas Engine
Speed (RPM.) 3450
Self Priming Yes
Suction Lift (FT.) 26
Max Operating Temperature (F) 120
Viscosity Cream 16.50 cp 100.00 ssu
Mechanical Seal Yes
Mechanical Seal Face SiC
Mechanical Seal Type Single
Other 18''x14''x15''. EPA and CARB Certified Engine. Shaft Seal is 0115159
Low Oil Shutdown Yes
Impeller Material Spherodial Graphite Cast Iron, semi-open
Duty Continuous
Drain Yes
Port Rotation Yes
Run Time (HR.) 2.5
Country of Manufacture Japan
Weight (Lbs) 56.000000
Engine Brand Honda
UPC 4971770113015
Warranty (YRS.) 3
GPM Of Water At 50 Feet Of Head 100
GPM Of Water At 70 Feet Of Head 65

Koshin pumps are the standard and known world wide in the contractor, rental, and portable pump markets as the brand to use. Most portable water pumps by Koshin feature Honda gas engines. Koshin manufactures a complete line of self priming centrifugal pumps for general transfer, high pressure and trash debris filled liquids. These pumps come in gas or diesel engine and single phase electric submersibles. Koshin is the most copied pump design coming out of China, but do not think they are the same. Use only the best, the original Koshin.

For over 70 years Koshin has continued to invest in new product testing and development. Koshin totally redesigned its production facilities in 2013 adding in house aluminum die casting, production automation, and state of the art process flow management. With a core philosophy of customer satisfaction, Koshin insures that each product off of its production line is of the finest quality. This is why we can proudly say that the performance specification found in this catalog are guaranteed minimum. This is often not the case with our competitors, who inflate actual performance values.

To further insure our valued customers that Koshin stands by our produces, we offer a 3 year limited warranty against manufactured defects. Our pumps are used and loved in 160 all over the world.

Koshin… the world’s toughest pump.