RedactedNarrative: Operator1 was operating V1 from the Avi Casino Launch Ramp and into the Avi Casino Lagoon/Beach No Wake Zone. When entering the lagoon area, Operator1 noticed that a water ski was touching the engine header and had caught fire. The fire spread to the port side of the vessel and moved toward the bow. Operator1, along with bystanders, fought the fire until it was extinguished.