Aluminum Propeller AMITA3 10.0X14 Right Hand 4211-100-14

Function and Technical Context

The AMITA3 propeller with a diameter of 10.0 inches and a pitch of 14 inches functions as the final drive element in the kinetic chain of 25 and 30 hp four-stroke outboard motors, converting engine torque into effective hydraulic thrust on the water. Its three-blade geometry with dextrorotation (right-hand pitch) is designed to achieve optimal balance between acceleration response and cruise efficiency, particularly for lightweight hulls, semi-rigid vessels, and recreational craft of reduced length overall. Manufactured from high-strength aluminum alloy, this propeller absorbs point impacts well and is easy to replace in the field, making it the preferred option for vessels in intensive service. A pitch of 14 inches offers proven compromise between low-speed traction and cruising performance, preventing the engine from operating outside the RPM band recommended by the manufacturer. When the propeller is not in optimal condition, the engine is forced to operate outside its design parameters, accelerating internal wear of the gearbox, shaft seal, and rudder tube bearings.

When Should This Part Be Replaced?

The clearest indications that the propeller needs replacement are: abnormal vibrations or buzzing transmitted to the transom at different operating speeds, visible loss of maximum speed with no apparent engine fault, inability to reach maximum RPM at full load, or recurring cavitation episodes at the stern. Aluminum blades are vulnerable to impacts with rocky bottoms, semi-submerged floating debris, and sand during groundings, which cause bending, dents, or dynamic imbalances that directly impair propulsion and may damage the shaft seal. Visual inspection of the propeller is recommended at the beginning of each boating season and immediately after any impact, proceeding to preventive replacement at any visible deformation, as operating with a compromised blade transfers undesirable mechanical stresses throughout the lower transmission assembly.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer References