Aluminum Propeller AMITA3 15.30X21 Right-Hand

Function and Technical Context

The AMITA3 aluminum propeller acts as the final element of the propulsion system, converting the engine torque transmitted through the reduction gearbox into hydraulic thrust on the water through the coordinated rotation of its three blades. With a diameter of 15.30 inches and a pitch of 21 in right-hand rotation, this component directly defines the operating point of the engine, conditioning the cruising RPM, maximum speed and acceleration response of the vessel. A correctly sized propeller allows the propulsion unit to operate within the revolution range specified by the manufacturer, optimizing the thermodynamic efficiency of the engine and reducing fuel consumption. The three-blade design of the AMITA3 series favors the balance between planing efficiency and starting torque, being especially suitable for installations with Suzuki engines up to 225 hp. The aluminum used in its manufacture provides lightness and good dynamic response, contributing to agile acceleration from low speeds.

When to Replace This Part?

The most frequent signs that the propeller requires replacement are vibrations transmitted to the tiller or steering wheel during navigation, the inability to reach the recommended maximum RPM with the engine at full load, and the progressive loss of thrust without anomalies detected in the engine group. Aluminum is especially vulnerable to impacts with submerged objects and the prolonged effects of cavitation, which generate erosion, leading edge erosion of the blades and deformations that alter rotational balance. It is recommended to visually inspect the propeller at the beginning and end of each boating season, and replace it preventively if any appreciable structural damage is detected, since a damaged propeller transmits irregular stresses to the shaft, hub and bearings, which may cause more costly breakdowns in open water.

Equivalent Manufacturer References