Lightweight, Compact Design Mercury?s cutting-edge engineering has packed incredible power into a small, light package. A simple design with fewer parts than competitive engines. Durable, efficient power! Class Leading Displacement At 2.1 liters or 126 cubic inches this 4-cylinder SOHC design works less to produce more torque and horsepower! The large displacement design delivers optimum performance. Best in performance, reliability and efficiency! Optimal Torque Curve Mercury?s 75~115 strong low-end torque is what helps get the boat on plane instantly while delivering quicker acceleration. Also, as load increases torque plays a big roll in maintaining performance. More power throughout the RPM range! Low Maintenance Advantages Easiest to Maintain 1. Engine design & layout provides ease in routine maintenance. 2. Maintenance-free valve train. 3. No-mess oil change system. 4. No tools needed fuel filter service. 5. Color-coded maintenance locations. 6. Up-front freshwater flush system. 7. Single latch, lightweight guided cowl (easy off & on).