AMITA 3 PROPELLER 13.8X21

Function and technical context

The 13.8x21 Amita 3 propeller is the propulsion element that converts the power of the outboard motor into effective thrust on the water, transmitting the torque from the tail shaft directly to the aquatic environment. With three blades and a pitch of 21 inches, this model is designed for medium-high power engines, offering a balance between acceleration and top speed in recreational boats and sports use. A correct adjustment of the pitch and diameter of the propeller is decisive for the engine to work within its optimal speed range; A worn, bent or incorrectly specified propeller causes a direct drop in performance, increased fuel consumption and can stress the drive unit to the point of shortening its useful life.

When to replace this part?

The most common symptoms that indicate that the propeller needs to be checked or replaced are: abnormal vibrations in the tiller or steering wheel, notable loss of top speed or acceleration response, and unjustified increase in fuel consumption. Bent blades, eroded by cavitation or with leading edges damaged by impacts with floating objects are reasons for immediate replacement, since even slight deformations alter the dynamic balance and accelerate the wear of the transfer case seals and bearings. It is recommended to visually inspect the propeller during each seasonal maintenance and replace it preventively if there is any sign of damage; A propeller in poor condition can render the boat unusable on the high seas when maximum performance is most needed.