Aluminum Propeller AMITA3 15.5X17 Right Hand

Function and technical context

The propeller is the final link in the marine transmission system: it transforms the torque delivered by the outboard motor into net hydraulic thrust on the water, directly determining the vessel's speed, acceleration response, and fuel consumption. This AMITA3 marine aluminum propeller, with a diameter of 15.5 inches and a pitch of 17 inches in right-hand rotation, is designed for high-power Suzuki outboard motors up to 225 HP, where precise adjustment between diameter, pitch, and direction of rotation is essential for the propulsion unit to operate within the motor's design RPM range. Incorrect pitch selection causes the motor to either fail to reach the recommended maximum revolutions—overloading the propeller and degrading the internal bearings of the lower unit—or to exceed them at idle, generating over-revving and premature wear of the powerplant. Construction in marine aluminum alloy balances sufficient structural strength for intensive recreational use with a competitive replacement cost compared to stainless steel propellers, making it the predominant option in medium-length vessels intended for coastal and sport cruising.

When should this propeller be replaced?

The clearest signs that the propeller requires replacement are vibrations transmitted to the hull or steering wheel at any operating regime, noticeable loss of top speed or thrust during hard acceleration, and the inability to reach the maximum RPM specified by the manufacturer even with the motor in perfect maintenance condition. Impacts with submerged objects—lines, plastics, rocky bottoms—deform or crack the blades generating imbalances that, if not corrected, transmit asymmetrical loads to the seals and bearings of the lower unit shaft, multiplying the cost of subsequent repair. Visual inspection of blade condition is recommended at each seasonal haul-out and following any impact detected during navigation; a bent or cavitation-eroded blade should be replaced preventatively, as propeller failure in open water can leave the vessel without steering or propulsion.

Equivalent manufacturer references