PROPELLER NUT 11-88228

Function and technical context

The propeller nut is the critical fastening component that secures the propeller to the engine drive shaft. It works in the propulsion system, supporting the rotational and traction forces generated during navigation. This nut must maintain a precise tightening to prevent the propeller from loosening during operation, which would cause loss of power, excessive vibrations, damage to the tail shaft and, in extreme cases, detachment of the propeller during navigation.

When to replace this part?

Inspect the propeller nut at least once at the beginning of each sailing season and after any impact or grounding that affects the propeller. If you notice loosening, cracking, thread deformation or signs of advanced corrosion, replacement is mandatory. As a preventive practice, replace it along with the propeller during deep maintenance checks to ensure secure attachment and avoid emergency repairs in the water.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers