RedactedNarrative: Operator launched boat and drove from launch into Rainbow Lake.  Passenger and operator noticed water in floor of boat while on west side of Rainbow Lake and the operator throttles down and reported that the motor stopped at this point.  Boat drifted from west side of Rainbow to east side, passer by boat assisted and towed them back to launch.  Motor still did not work after being removed from the water and after water was drained from compartment.