Lexor Propeller 15.4X18 Right

Function and Technical Context

The propeller acts as an interface between the rotational energy generated by the engine and the aquatic medium, converting engine torque into effective thrust through the hydrodynamic action of its blades on the water mass. This propeller, with a diameter of 15.4 inches and a pitch of 18 inches in right-hand rotation—clockwise as viewed from the stern—directly determines the load on the crankshaft and the operating regime at which the propeller will function under actual navigation conditions. Incorrect selection of pitch or diameter displaces the engine outside its optimal RPM band, causing overloads in the gearbox, elevated fuel consumption, and premature deterioration of seals and bearings on the propeller shaft. Right-hand rotation configuration is standard in single-propulsion installations, so verifying the direction of rotation before installation is essential to ensure correct thrust and prevent damage to the transmission system.

When to Replace This Part?

The most frequent signs that the propeller requires replacement are unusual vibrations transmitted to the hull or shaft at different speed regimes, noticeable loss of top speed, sluggish acceleration response, and persistent cavitation caused by deformed, cracked, or severely eroded blades. It is recommended to visually inspect the blades at the beginning of each boating season and immediately after any impact against a submerged object, as even minor deformation compromises dynamic balance and generates destructive stresses on shaft bearings. Replacing the propeller at the first signs of damage avoids considerably more costly repairs to the gearbox and propeller shaft sealing assembly.

Compatibility Table

Equivalent Manufacturer References