O-Ring 55122-88L00 55122-94400

Function and technical context

This O-ring acts as a watertight seal in threaded or press-fit unions of the hydraulic or cooling circuit of the outboard motor, preventing fluid leakage between components. It operates in the fluid management system of the propulsion unit, where two metal or plastic parts must remain sealed against working pressure and temperature variations typical of the marine environment. Its correct installation is essential: a failure in this seal can cause water ingress into sensitive motor areas, loss of pressure in the affected circuit, or progressive damage to adjacent components. It is manufactured to meet the dimensional tolerances required by Suzuki in its outboard motors, ensuring precise fit in the corresponding housing. It is also compatible with Johnson and Evinrude motors using reference OMC 5031535, making it a widely used part in marine workshops.

When to replace this part?

The most common symptoms of O-ring deterioration in outboard motors are small fluid leaks appearing around the union where it is housed, oil or water stains in the sealing area, and in advanced cases, loss of internal pressure with resulting malfunction of the affected system. It is recommended to inspect it at each seasonal maintenance or whenever the assembly containing it is disassembled, as rubber ages with thermal cycles and exposure to saltwater. Replacing it preventively during any intervention in that area of the motor avoids unexpected breakdowns and the cost associated with emergency repair on the water.

Compatible Johnson/Evinrude Motors

Equivalent manufacturer references