DIABOLO MERCURY 12596T2 REC12596T2

Function and technical context

The diabolo is a critical component of the transmission system in Mercury Mariner engines, responsible for transmitting engine power to the propeller through the tail shaft. This set of bearings acts as a carrier of radial and axial loads generated during acceleration, cruising and maneuvering of the outboard motor. Its correct operation is essential to maintain propeller shaft alignment and ensure efficient power transfer; A deterioration of the diabolo can cause abnormal vibration, loss of traction and, in extreme cases, damage to the shaft or water entry through the seals.

When to replace this part?

Typical symptoms of diabolo wear include excessive shaft vibration, metallic noise during acceleration, and abnormal lateral movement of the motor tail. It is recommended to check the condition of the bearings every sailing season and replace the set if play, oxidation or damage to the rolling surfaces is detected. Preventive diabolo replacement during winter maintenance prevents unexpected breakdowns at sea and prolongs the life of other drivetrain components.

Engine Compatibility Table

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers