Engine is a large category. You will find subpages for all the major components. This is a work in progress. Content will be gradually improved.
The location of the engine number is on the left side between the alternator cover and the cylinder. It encodes the displacement (in this case 250), the model year (in this case 2014), and the casting number (in this case 0039). The spacer for a flywheel weight is also visible between the engine casting and the alternator cover.
The final digits of the engine and chassis numbers match on one of my OSSAs. Another is reasonably close. The numbers on the 2011 are vastly different.