Multi-C Propeller ALUM.AMITA3 11.8X11 Right Hand

Function and Technical Context

The propeller is the fundamental propulsion component that converts the rotational energy of the engine into hydraulic thrust, moving the vessel through the water by rotating its blades. This unit is manufactured in aluminum with a diameter of 11.8 inches and a pitch of 11 inches, with right-hand rotation, designed under Solas Multi-C concept (reference 4311-118-11), which optimizes the geometry of each blade to maximize performance in both acceleration and cruising speed. It works directly in the stern shaft transmission system, being the final link between the engine and the water, so its condition directly determines whether the propulsor achieves the RPM range specified by the manufacturer. A propeller with incorrect pitch, deformed, or deteriorated prevents the engine from operating in its optimal efficiency zone, which results in increased fuel consumption, propulsor overload, and loss of top speed. Its compatibility with Suzuki, Mercury, Mariner, MerCruiser, OMC, and Johnson/Evinrude engines from 40 to 50 HP makes it a widely applicable solution for recreational and professional use vessels.

When to Replace This Part?

The most frequent signs that the propeller requires inspection or replacement are: unusual vibrations transmitted to the rudder or hull during navigation, progressive loss of maximum speed, difficulty reaching working RPM under full load, and episodes of persistent cavitation. Strikes against submerged objects—bottoms, ropes, floating debris—can cause bending, notches, or breaks in the blades that, although imperceptible to the naked eye, alter dynamic balance and accelerate deterioration of the bearings and stern seal. It is recommended to visually inspect the propeller at each seasonal haul-out and proceed with its replacement at any sign of deformation, as navigating with a damaged propeller can result in serious and costly damage to the shaft or transmission gearbox.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer References