ALUMINUM PROPELLER 15.8X15 LEFT 48-19841A46

Function and technical context

The left 15.8x15 aluminum propeller is the fundamental propulsion element that transforms the power of the Mercury Marine engine into directional movement of the boat. Coupled to the drive shaft of the propulsion system, this propeller works in the most demanding environment: submerged in salt or fresh water, supporting pressure, erosion and constant corrosion. Its specific geometry of 15.8 inches in diameter and 15 inches of pitch, in left-turn configuration, is optimized for engines from 90 to 300 hp with Command Thrust systems and 3.4L blocks, guaranteeing maximum hydrodynamic efficiency. Propeller wear directly reduces available traction, increases fuel consumption and can cause vibrations that damage shaft bearings and seals.

When to replace this part?

Inspect the propeller at the beginning of each boating season: cracks, deformations, areas of deep corrosion or advanced rust are clear indicators of imminent replacement. If you notice a noticeable loss of revolutions at maximum acceleration, an increase in fuel consumption without apparent cause or abnormal vibrations in the steering column, it is likely that the propeller is damaged or eroded. Replacing the propeller preventively after 5-7 years of intensive use in coastal waters, or in the event of any impact with a submerged object, avoids unpredictable breakdowns in navigation and maintains the operational safety of your boat.

Equivalent manufacturer part numbers