Centrifugal          > Print chart
4IN / PKX401
   Performance Curve:
Performance Curve
Performance Curve

Pump Overview:

Pump Family Overview:
Centrifugal pumps deliver liquid at uniform pressure without shocks or pulsations. Having only one easy-to-replace wearing part (a seal), Subaru's centrifugal construction pumps are easy to maintain, requiring no lubrication, gears, pistons or diaphragms. The simplicity, compactness and economical design make them ideal for a wide variety of general applications. And best of all, every pump is powered by Subaru’s industry leading 4-cycle engine technology, ensuring optimum performance and reliability.

  Type Self-Priming Centrifugal Pump
  Suction/Discharge Size 4 inches
  Maximum Capacity 356 Gallons Per Minute
  Maximum Lift Head 89 Feet
  Maximum Suction Lift 26 Feet
  Maximum PSI (max. head/2.31) 44
  Mechanical Seal Material Ceramic Carbon
  Engine Model EX27
  Engine Type Subaru Air Cooled, 4-Cycle, OHC
  Fuel Gasoline
  Horsepower 9.0 HP
  Low Oil System Shutdown
  Spark Arrestor Standard
  Run Time (per tank, full load) 2.2 Hours
  Fuel Tank Capacity 1.61 Gallons
  Starting System Recoil
  Dimensions (LxWxH) 25.6"x18"x25.4"
  Net Weight 112 lbs.
  Tool Kit Standard
  Vibration Isolators (loose) Standard
  Hose Band Standard
  Strainer Standard
   Key Features & Benefits:
Self Priming Self priming pumps require initial priming to operate.
Ceramic Carbon Mechanical Seal Self-lubricating ceramic carbon mechanical seal provides rugged construction for long unit life.
Cast-Iron Impeller and Volute Abrasion-resistant, hardened cast-iron impeller and volute effectively withstand suspended debris sucked through the strainer.
Die-Cast Pump Housing Lightweight die-cast aluminum pump housing provides strong durability against damaging debris.
Shimmable Impeller to Volute Shims allow the clearance to be readjusted between the impeller and volute as the pump wears from dirt and grit. This saves the cost of replacing the major pump components.

Standard Accessories Standard accessories include tool kit, vibration isolators-loose and hose band.
Full Tubular Wrap Frame All models include a steel wrap frame to protect all sides of the unit.
Fuel Tank with Strainer Metal fuel tank provides extended run times between refills. The fuel strainer prevents debris from entering the tank.
Low-Oil Shutdown Subaru engines incorporate a low oil shutdown that shuts off the engine when low oil level is detected.
Muffler with Spark Arrestor

Subaru specifically engineers each muffler to each engine, therefore providing optimum sound reduction.  Each muffler includes a US Forestry-approved spark arrestor.


Fuel Shut Off Valve with Translucent Fuel Sediment Cup Shut off valve is used when transporting or servicing the pump. The translucent sediment cup and filter allow the operator to see if any water or dirt have entered the engine. The cup can be removed, cleaned and reinstalled.