What does boat motor vro equipped mean?

"VRO" stands for Variable Ratio Oiling, a system used in certain outboard motors, primarily by Johnson and Evinrude. This system automatically mixes oil and fuel in the correct ratio, adjusting based on engine speed and load, which helps prevent engine damage due to inadequate lubrication. A "VRO equipped" boat motor signifies that it has this automatic oil injection system, reducing the need for manual mixing and simplifying maintenance for the user.