Lexor Propeller 15.4X18 Left Hand

Function and Technical Context

In the marine propulsion line, the propeller is the element that transforms the rotation of the tailshaft into effective thrust on the water, being the final link between the engine-transmission assembly and the actual displacement of the vessel. This unit, with a diameter of 15.4 inches and a pitch of 18 inches, rotates counterclockwise (left-hand thread), which makes it specifically necessary in dual-engine installations with counter-rotation: the set of two opposing propellers—one right-hand and one left-hand like this one—cancels out residual torque, improves steering stability, and optimizes propulsive efficiency across the entire speed range. Lexor manufacturing incorporates careful blade balancing that minimizes vibrations transmitted to the hull and transmission line components, extending the service life of shaft seals, bearings, and the propulsion unit itself. Selecting an inadequate pitch for actual working conditions causes engine overspeed or bogging, increasing fuel consumption and shortening the propeller's lifespan.

When to Replace This Part?

The clearest signs that the propeller requires inspection or replacement are: appearance of unusual vibrations in the hull or rudder even at low RPMs, appreciable drop in maximum speed or acceleration response without cause attributable to the engine, and increased fuel consumption under the same loading and sea conditions. Physical damage to the blades—bends, nicks from impact with floating objects or the bottom, and pitting from cavitation erosion on the leading or trailing edges—are the most common cause of dynamic imbalance and should be inspected at each haul-out or at the start of season maintenance. Operating with a damaged propeller accelerates wear on the shaft seals and transmission bearings, turning a simple replacement into a more costly repair; in the event of any visible damage, preventive replacement is the technically and economically most reasonable decision.

Compatibility Table

Equivalent Manufacturer References