Patent ID: 6921305

Claim:
An outboard drive unit for a watercraft, comprising: an upper unit housing a motor with a drive shaft; a lower unit operationally connected to the upper unit, the lower unit comprising an input shaft; a propeller assembly comprising a propeller shaft, said propeller shaft being oriented at an obtuse angle in relation to said input shaft, a propeller blade mounted on the propeller shaft, a cavitation plate and a skeg mounted at a generally right angle to said cavitation plate, said propeller blade and said cavitation plate being normally submerged under the surface of mud or water when the watercraft is in a stationary position and at least partially above the mud or water surface when the watercraft moves on plane on mud or water surface, said cavitation plate and said skeg are secured on a stuffing tube, and wherein the propeller shaft extends through said stuffing tube, a distant end of the propeller shaft carrying the propeller blade, and wherein the cavitation plate extends above the propeller blade, said propeller blade having a certain arcuate portion, a cupped area and an auger portion, said cupped area occupying about 110 degrees of the arcuate portion of the propeller blade; and a means for adjusting trim of the propeller assembly, thereby allowing extension of a propeller blade partially above a water line when the watercraft moves on plane on mud or water surface, and a reduction gear assembly mounted between and operationally connected to said input shaft and said propeller assembly.