Koshin STH-100X Semi-Trash Pump 383 GPM 4" w/ Honda Engine - Pump - Koshin

Koshin STH-100X Semi-Trash Pump 383 GPM 4" w/ Honda Engine

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  • $1,919.00
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For Service Parts Ordering
It is up to the customer to ensure that they are ordering the correct part number. For help obtaining part numbers please contact:

HeatStar: 1-866-447-2194
Enerco: 1-888-849-1899
Mr. Heater, Cleveland Iron Works, and BaseCamp: 1-800-251-0001

Professional contractors know that worksite water is often muddy, sandy and can wear down a clear-water pump. Koshin’s Semi-Trash Pumps are designed to the highest quality for optimal durability under tough construction site conditions.


  • Silicon carbide mechanical seals for increased abrasive resistance, longer life, and less maintenance
  • Perfect for irrigation, construction, industrial and general water transfer
  • Cast iron impellers blended with hi-chrome, for extreme durability and erosion resistance
  • Front covers are removable without disassembly of hoses. Easy and quick access, for cleaning out debris, or pump repair
  • Impellers and volutes are constructed of spheroidal graphite ductile cast iron for increased durability and long life
  • Pump housings are made of die-cast aluminum for strength, weight reduction and portability
  • Rugged powder-coated roll cages
  • Honda Engine with low oil shut off
  • 3-year limited warranty on pump ends


Suction, Discharge Size 4″ NPT
Maximum Output 383 GPM
Maximum Discharge Head 92 ft.
Maximum Suction Lift 26 ft.
Maximum Pressure 39.8 psi
Engine Model Honda GX240
Engine Displacement 242 cc
Engine Horse Power 7.9 hp
Fuel Tank Capacity 1.39 gal.
Full Load Run Time 2.5 hours
Fuel Type Unleaded Gasoline
Packaged Weight 132 lbs.
Packaged Dimensions (LxWxH) 26″ x 20″ x 26″


STH-100X Semi-Trash-Pump Performance Curve

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