STAINLESS STEEL PROPELLER RUBEX NS3-D 13X21 RIGHT

Function and technical context

The right INOX Rubex NS3-D 13x21 propeller is the fundamental propulsion element that transforms the power of the engine into forward movement of the boat. It works in the marine propulsion system, submerged in water and coupled to the engine transmission shaft. Its 13-inch diameter and 21-inch pitch define the revolutions and maximum achievable speed; Progressive wear, erosion due to cavitation or damage to the blades drastically reduces thrust efficiency, forces the engine to work at higher revolutions to maintain speed and significantly increases fuel consumption and the mechanical stress of the propeller.

When to replace this part?

A marine propeller should be inspected at each seasonal tune-up and replaced if there are symptoms such as abnormal vibration of the engine during navigation, loss of speed despite normal revolutions, unusual noise or splashing at the stern, or visible damage to the edges of the blades (cracks, deep dents, erosion). Stainless steel propellers are more durable than aluminum ones, but cavitation, contact with rocks or floating debris, and sea salt accelerate their wear; Preventive replacement at every 2 to 3 year interval of heavy use or at the first sign of abnormal performance prevents costly engine repairs in emergency situations at sea.

Equivalent manufacturer part numbers