Manufacturers take a number of variables into account when determining the maximum person capacity for a boat (which is displayed on the capacity plate indicates the maximum allowable weight of persons, equipment, stores, fuel, engine assembly, and steering controls as well as the recommended safe limits of engine power. ). The maximum person capacity is a guideline. Keep in mind that most manufacturers assume an average weight per person of 150 lb. If you have passengers over 150 lb., you should adjust the maximum person capacity accordingly.