STAINLESS STEEL PROPELLER RUBEX NS3-E 14X21 RIGHT

Function and technical context

The INOX Rubex NS3-E 14X21 propeller is the propeller responsible for converting engine power into direct hydrodynamic thrust. This right-hand shaft propeller works coupled to the engine's crankshaft or transmission shaft through a standard fixing flange, transmitting the rotary movement to the water to generate the boat's propulsion. Its 316 stainless steel core guarantees exceptional resistance to marine corrosion, avoiding the erosion that aluminum or bronze alloys suffer in prolonged saline environments. A worn, cracked or damaged propeller significantly reduces propulsive efficiency, causing loss of speed, increased fuel consumption and engine overload.

When to replace this part?

Characteristic symptoms of propeller wear include unusual engine vibrations, progressive loss of maximum revolutions, audible cavitation (bubbling sound), visible deformation of the blades or cracks in the root zone. It is recommended to inspect the propeller at the beginning of each sailing season and after strandings or impacts against underwater objects. Preventively replacing a damaged propeller avoids secondary damage to the drive shaft, bearings and transmission, repairs that are significantly more expensive than investing in a new propeller.

Equivalent manufacturer part numbers