Check the listing for details. 13GPM Log Splitter Pump w/Coupler Set and Pump Mount. Condition: New. Listed at 166.00 USD. 13 GPM Commercial Duty 2-Stage Hydraulic Pump for Log Splitters - Stages: 2 - GPM: 13 - Construction: Extrusion Aluminum - Max. Operation Speed: 3600RPM - Max. Operation Pressure: 4000PSI - Shaft Extension: 1.5" - Shaft Diameter: 1/2" - Keyed Shaft: 1/8" Square - Inlet Port: 1.0" Diameter Tube - Outlet Port: 1/2" NPT Mounting Bracket/Mount for up to 8 Hp Engines - Engine Side Holes: 3-9/16" bolt circle (4 hole pattern) OR 2-1/2" center to center hole distance measured horizontal or vertically (square) - Pump Side Hole: 2-3/4" bolt circle (8 hole pattern) OR 2" center to center hole distance measured horizontal or vertically - Height: 4-1/16" - Coupler clearance hole is 1.790" - Square engine side clearance hole is 2" x 2" - Powder Coated - Sand casted part - will have sand casted texture - pump and engine mount surfaces are machined smooth All Necessary Hardware to Connect the Pump and Engine - This kit comes with the hardware required to connect the pump and the engine - Pump Side Bolts: 4 bolts, 2 lock washers and 2 nuts LO75 LoveJoy Style 3-Jaw Coupler W/ Rubber Spider & Set Screws - Commercial duty LO75 3-Jaw coupler - Connects pump shaft (1/2" Dia) and engine shaft (3/4" Dia) - Set screws provided (put removable thread locker on them before installation)