BEARING 31-12576 REC31-12576

Function and technical context

The 31-12576 thrust bearing is a precision component that forms an integral part of the marine transmission system in Mercury, Mariner and MerCruiser engines. This bearing supports and regulates the axial movement of the propeller, allowing smooth and controlled rotation while transmitting the engine's power to the boat's propulsion. Its correct operation is essential to maintain propulsion efficiency and avoid excessive vibrations that could compromise the structure of the propulsion system and affect navigation stability.

When to replace this part?

Typical symptoms of thrust bearing wear include abnormal vibration in the stern area, metallic noises during acceleration and loss of propulsive efficiency. This type of component should be inspected regularly during each seasonal maintenance, especially on heavily used vessels or in silty waters. Preventive replacement of the bearing avoids the risk of total failure during navigation and prevents secondary damage to the marine transmission, which represents significant savings in emergency repairs.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers