Lexor Propeller 14.9x22 Left Hand

Function and Technical Context

The left-hand rotation propeller element with a diameter of 14.9 inches and a pitch of 22 inches operates in the vessel's propulsion system as the final mechanical link between the transmission and the aqueous medium, converting engine torque into net thrust. Its counter-clockwise rotation direction—viewed from astern—makes it essential in counter-rotating configurations or in installations with a gear-reversing shaft, where mounting a right-hand pitch propeller would cause uncontrolled torque forces, structural vibrations, and direct overload on the stern bearings and shaft seal. The 22-inch pitch determines the relationship between theoretical advance per revolution and actual hydrodynamic load, having a decisive influence on the engine's operating RPM, fuel consumption, and the maximum speed of the assembly. Poor pitch selection or a blade with residual deformation prevents the engine from operating within its optimal speed range, resulting in premature transmission wear and sustained loss of propulsive efficiency.

When to Replace This Component?

The clearest indicators that the propeller requires replacement are rhythmic vibrations transmitted to the hull or shaft during navigation, the inability to reach customary cruising RPM under identical load and acceleration rate, and the onset of persistent cavitation or bubble noise under normal operating conditions; eroded, bent, or micro-cracked blades alter the dynamic balance of the assembly and accelerate deterioration of the shaft line seals and bearings. It is recommended to visually inspect the propeller at each seasonal haul-out, paying special attention to impact marks, leading edge deformations, and loss of symmetry between blades. Delaying replacement in the face of any appreciable deformation can result in progressive failures in the gearbox or stern tube, whose repair proves significantly more costly than preventive replacement of this component.

Equivalent Manufacturer References