Abstract: The present invention relates to a propeller enclosure for enclosing a skeg and propeller. The invention includes a fence portion which defines a first chamber. The first chamber is designed for receiving the skeg of a watercraft motor. The fence portion allows the passage of water therethrough. The invention also includes a solid band portion which defines a second chamber. The second chamber receives the propeller. A first end of the solid band portion is attached to the fence portion. So that the first chamber communicates with the second chamber. The invention also includes a cover which is mounted on a second end of the band portion. The cover allows the passage of water therethrough. The cover includes means for causing trim-tab-like action. The propeller enclosure of the present invention is intended for mounting to a cavitation plate.