OMC Evinrude Johnson Labyrinth Ring

In OMC Evinrude and Johnson outboards, a labyrinth ring is a type of non-contact seal designed to prevent water and contaminants from entering the gearcase, protecting the mechanical seals and prolonging their lifespan. It's essentially a ring with a series of grooves or labyrinth channels, creating a torturous path that makes it difficult for water or debris to pass through. 

Here's a more detailed explanation:

Non-Contact Seal:

Unlike mechanical seals that rely on a fixed contact surface, labyrinth rings are designed to not touch the rotating parts of the gearcase.

Protection from high pressure:

Labyrinth rings help protect the mechanical seals from the high water pressure inside the gearcase.

Prolonged seal life

By preventing water and contaminants from reaching the mechanical seals, labyrinth rings helps extend their lifespan

Reduced wear

The Non-contact design of the labyrinth ring also reduces wear on the ring itself, as it doesn't experience the frictional contact of a rotating part

Preventing Leakage and contamination

The labyrinth design creates a difficult path for water and debris to follow, preventing them from entering the gearcase and potentially causing damage.