Propeller slip is the difference between the theoretical distance a propeller should advance in one revolution and the actual distance it travels. This difference, expressed as a percentage, indicates propeller efficiency. A calculation tool dedicated to Mercury Marine propellers assists in determining this efficiency metric, requiring input parameters such as propeller pitch, gear ratio, engine RPM, and boat speed.
Understanding propeller slip is crucial for optimizing boat performance. Higher slip percentages can indicate inefficiencies resulting from factors such as an incorrect propeller choice, excessive load, or damage to the propeller. Analyzing this metric allows for adjustments to propeller selection, engine trim, or load distribution, leading to improved fuel economy, increased speed, and reduced engine strain. The application of such a calculator streamlines this diagnostic and optimization process, potentially saving time and resources.