The invention provides a power take-off system for an internal combustion engine having a drive gearpositioned within a crankcase housing, which includes a gear housing removably coupleable to an exterior of the crankcase housing of the internal combustion engine. The power take-off system also includes a gear train that is positioned within the gear housing, the gear train being drivable directly by the drive gear positioned within the crankcase housing. Also disclosed is an internal combustion engine comprising a flywheel housing coupled to the engine block, the flywheel housing containing a drive gear driven by the crankshaft, and a power take off is coupled to the flywheel housing. The power take off comprising a housing and a gear train positioned within the housing, wherein a drive gear of the gear train is in direct engagement with the drive gear. Either apparatus may also contain an idler gear and may supply dual accessory interfaces via a power transfer gear 134 on opposing sides of the gear housing.