Building on the proven durability and reliability of the 3500 engine platform, Caterpillar Marine readily offers an upgraded version—the Cat 3516E Marine Propulsion Engine. This high?performance engine delivers a 19% increase in rated power, reduces thermal emissions to the environment, and features improved acceleration response. Designed with a strong focus on service convenience and digital integration, it offers simpler connectivity and installation. Optimized for smaller engine rooms with reduced weight and dimensions, it is an ideal choice for tugs, workboats, and yachts.