When a significant product change occurs (i.e. when a new model is introduced that replaces a prior version), the model designation will change as needed. By utilizing this process, models with the same code are physically identical, regardless of when they were built. To view the date of manufacture, reference the serial number label that is located on the engine (see example above). An authorized Evinrude dealer can help you identify the date of manufacture on the engine(s). This is also of particular importance if you are repowering a boat with dual or triple engine applications.