BEARING 31-41326

Function and technical context

The 31-41326 roller bearing is a critical component in the drive system of Mercury, Mariner and MerCruiser outboard engines. Its main function is to support and facilitate the rotation of the drive shaft, allowing the engine's power to be efficiently transferred to the propeller. This bearing works under constant dynamic loading conditions, supporting tensile and torsional forces while maintaining precise radial clearance. A failure in this component compromises the alignment of the shaft, causing excessive vibration, accelerated wear of seals and, in serious cases, the entry of water into the transmission.

When to replace this part?

Symptoms of bearing wear include abnormal vibration while boating, harsh or choppy bearing noise inside the outboard, and loss of thrust power. It is recommended to inspect this component every navigation season and replace it preventively if any tactile or acoustic irregularity is detected, especially after intensive hours of use or navigation in waters with sediment. Preventive replacement prevents costly breakdowns at sea and ensures maximum transmission efficiency.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers