To improve the efficiency of your outboard or stern drive in smooth water, what should you do?

To improve the efficiency of your outboard or stern drive in smooth water, raising your outboard or outdrive slightly is the most effective choice. When the outboard or stern drive is positioned correctly, it optimizes the boat's planing ability and reduces resistance from the water. By raising the outboard, you allow the boat to ride higher on the water, which minimizes drag and maximizes fuel efficiency.

When the engine is too low in the water, it creates more drag, making it harder for the boat to reach its optimal speed and efficiency. Adjusting the engine's height can lead to better performance, especially in conditions where smooth water allows for more effective planing.

The other options do not contribute positively to the efficiency in smooth water. Lowering the engine fully increases water resistance, changing the fuel type may not have a direct impact on efficiency, and increasing the weight on board unnecessarily burdens the boat, which can also reduce its efficiency and performance.