MULTI-D PROPELLER ALUM.AMITA4 12.5X19 RIGHT

Function and technical context

This four-blade aluminum propeller, with 12.5×19 pitch and right-hand rotation, is the final component of the hydraulic transmission in medium and high-power Suzuki outboard engines. It acts in the propulsion system by converting engine torque into effective thrust on the water, being a determining factor in navigation performance, in-plane response and fuel consumption. A 19 pitch profile like that of this propeller is optimized for boats that require sustained cruising speed, and its aluminum alloy construction gives it a robustness-price ratio suitable for sports and recreational use. An imbalance, deformation or breakage in the blades can transmit vibrations to the shaft, damage the drive shaft seal and compromise the maneuverability of the boat.

When to replace this part?

The most common signs that the propeller needs replacement are abnormal vibrations at different revolutions, loss of top speed or plane capacity, and excessive cavitation caused by damage to the blade edges. Aluminum propellers are especially susceptible to impacts with submerged objects, sand and bottom, so it is advisable to visually inspect them at the beginning and end of each boating season. Replacing a bent propeller or one with damaged blades avoids unnecessary stress on the shaft and the bevel pinion of the reducer, preventing higher cost breakdowns.