Aluminum Propeller AMITA3 14.8X17 Left Hand 2512-148-17

Function and Technical Context

The AMITA3 aluminum propeller with 14.8x17 geometry and left-hand rotation acts as the final power transmission element in the propulsion system: it transforms the engine's torque into effective hydraulic thrust on the water. Its left-hand rotation configuration—also referred to as counter-rotating—makes it indispensable in OMC installations with transom outlet configured for that direction of rotation, whether in dual propulsion systems or in engines with specific transom transmission, where reversing the direction of rotation would nullify propulsive efficiency and compromise the vessel's directional stability. The 17-pitch, combined with a 14.8-inch diameter, defines the water bite per revolution and directly conditions the engine's working range, maximum achievable speed, and fuel consumption at cruising speed. The aluminum alloy used in its manufacture reduces rotational inertia compared to stainless steel propellers, which favors acceleration response and simplifies replacement in case of contact with the bottom or submerged objects.

When to Replace This Part?

The clearest signs that the propeller requires inspection or replacement are: noticeable vibrations in the rudder or hull frame at different operating regimes, engine inability to reach specified maximum RPM, loss of thrust during acceleration, and persistent cavitation manifested as dull noise and lack of throttle response. A blade with bending, notching, or electrolysis erosion breaks the dynamic balance of the rotating assembly and can transmit asymmetric loads to the shaft seal and transom bearings, generating progressive damage to higher-cost components. It is recommended to visually inspect the propeller at each seasonal haul-out and replace it preventively at any noticeable deformation, as prolonging use of a deteriorated propeller in OMC engines accelerates wear of the shock-absorbing hub and can result in damage to the complete propulsion unit.

Equivalent Manufacturer References