ALUMINUM PROPELLER 15.3X19 LEFT 48-13701A46

Function and technical context

The left 15.3x19 aluminum propeller is the fundamental propulsion element in Mercury Marine outboard and inboard motor transmission systems. This propeller transforms the engine's mechanical energy into hydrodynamic thrust, propelling the boat through the water using its blades specifically designed for left-hand rotation. The 15.3-inch diameter and 19-inch pitch are calibrated to optimize performance over a wide power range, from 90 to 300 horsepower, ensuring maximum efficiency in acceleration and cruising speed. Its aluminum construction provides a balance between structural strength and lightness, reducing vibrations transmitted to the hull and improving directional stability when sailing at different speeds.

When to replace this part?

The propeller requires inspection and possible replacement when symptoms such as progressive loss of power, abnormal vibrations in the transmission, reduction in maximum speed without variation in engine revolutions, or visible damage to the blades due to impact with submerged objects or galvanic corrosion are observed. It is recommended to check the condition of the propeller at least once per sailing season, especially after sailing in shallow waters or with debris, and replace it preventively if it has bent blades, microcracks or significant erosion. A worn or damaged propeller directly affects fuel consumption and can cause cavitation, compromising safety and increasing operating costs in recreational and professional boats.

Equivalent manufacturer part numbers

Mercury Marine Engine Compatibility