From inside (document excerpt):
Sand Pro /Infield Pro 3040 & 5040 Specifications* ® ® SAND PRO/INFIELD PRO 3040, MODEL 08703 ENGINE AIR CLEANER SYSTEM FUEL CAPACITY TRACTION DRIVE GROUND SPEED HYDRAULIC OIL TIRES/WHEELS MAIN FRAME BRAKES STEERING CONTROLS/GAUGES SEAT ELECTRICAL FEATURES SOUND LEVEL DIMENSIONS GROUND CLEARANCE WEIGHT WARRANTY Vanguard , V-twin cylinder, 4-cycle, OHV, air-cooled, gas engine with cast iron sleeves 16 hp (11 9 kW) at 3600 rpm Displacement: 29 3 cu in (480 cc) Oil capacity: 1 75 quart (1 8 liter) Electronic ignition Full pressure lubrication, oil filter Base mounted engine and pump with 4 isolation mounts ® SAND PRO/INFIELD PRO 5040, MODEL 08705 Vanguard , V-twin cylinder, 4-cycle, OHV, air-cooled, gas engine with cast iron sleeves 18 hp (13 4 kW) at 3600 rpm Displacement: 34 8 cu in (570 cc) Oil capacity: 1 75 quart (1 8 liter) Electronic ignition Full pressure lubrication, oil filter Base mounted engine and pump with 4 isolation mounts ® Remote mounted 3-phase Donaldson air cleaner.