Multi-d Propeller ALUM.AMITA4 13.80X15 Right Hand

Function and Technical Context

The AMITA4 aluminum propeller with 13.80×15 inch pitch and right-hand rotation acts as the final element in the transmission chain of outboard motors, converting engine torque into effective thrust on the water. Its four-blade Multi-d design works directly on the trim shaft, leveraging the geometry of each blade to reduce cavitation and improve stability when running at full throttle. The 15-inch pitch determines the theoretical advance per complete revolution, which influences both the engine's operating regime and the achievable cruising speed, making it essential to choose the correct combination of diameter and pitch to avoid overloading or underutilizing the propulsion unit. A bent or incorrectly sized propeller causes vibrations that transmit to the stern seal, the hub, and the transmission bevel gear, compromising the durability of the entire mechanical assembly. Reference SOL3413-138-15 is compatible with OMC 5033322 and Suzuki 58100-90J40-019 references, among others, guaranteeing a direct fit without modifications on the covered motors.

When to Replace This Part?

The clearest indicators that the propeller requires replacement are the appearance of perceptible vibrations at the stern during navigation, the engine's inability to reach the maximum operating regime recommended by the manufacturer, and a notable loss of top speed or planing capability, symptoms directly associated with bent, chipped, or unbalanced blades. It is recommended to visually inspect the propeller at the beginning and end of each boating season, as well as immediately following any impact with submerged objects—sandy bottoms, rocks, or floating debris—since even a slight deformation on the leading edge of a blade alters the dynamic balance of the assembly. Replacing the propeller at the first sign of structural damage is the most cost-effective decision in the long term, as an unbalanced blade transmits irregular stresses to the trim shaft and stern seal that can result in repairs of significantly higher cost.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer References