terminates at its lower end in an apron 102 the peripheral lower edge of apron 102 includes alternating teeth 104 and slots 106 also four generally vertical guide slots 108 are spaced around the apron 102 of outer cone surface 100 the outer cone surface 100 and the clutch tube 96 combine to form an air chamber 110 which when the clutch 94 is emersed in water gives buoyancy to the clutch 94 so that it will float upwardly in the water above clutch 94 is an agitator 112 having an apron or skirt 114 at its lower end and having cone shaped wall 116 extending upwardly therefrom and a downwardly and outwardly extending central tube 118 the cone shaped wall 116 and the downwardly extending portion of the central tube 118 form a float chamber 120 which is adapted to mate with and receive the outer cone surface 100 of clutch 94 protruding radially inwardly from the cone shaped wall 116 of the agitator 112 are four spaced apart guide ribs 122 which are adapted to fit within the guide slots 108 of clutch 94 this permits the clutch 94 to move vertically from its disengaged position shown in solid lines in fig3 to its engaged position which is shown in shadow lines in fig3 the guide ribs 122 cause the clutch to be engaged by the agitator 112 so that the two will rotate in unison when the clutch 94 is in both.