Yes.
http://www.boatingworldonline.com/Articles/2009/March/Features/CrashCourse.html
(see #4)
A sail boat with an outboard motor is still a sailboat UNTIL the motor is turned on then it becomes a powerboat. A sailboat with it's sails up and the engine running is deemed to be a motor-sailer.
A sailboat with its engine engaged
A sailboat with its engine engaged
A sailboat using engine power
a sailboat with its engine engaged
In maritime navigation, a sailboat is considered the stand-on vessel when it is under sail and the powerboat is approaching it. According to the "Rules of the Road," the sailboat has the right of way, and the powerboat must take action to avoid a collision. However, if the sailboat is also using its engine, both vessels must follow the same rules as powerboats, where they must give way to the more maneuverable vessel.
== There are too many variables to give a short answer, but generally speaking... a sailboat has the right of way over a powered recreational vessel when the sailboat is operating under the sail's power only. In other words, even if the sail is up, if the sailboat's engine is running and the propeller is engaged, it is considered a powered vessel.
If there is no wind and the sailboat has no auxiliary engine
A rowboat or sailboat
A sailboat with it's engine engaged
Engine
Sailboat is to sail as kite is to fly, just as airplane is to wing and oil tanker is to engine.