Thick Washer 1.1 09160-20042

Function and technical context

This 1.1 thickness washer acts as a sealing and load distribution element in bolted joints of the outboard motor, ensuring watertightness between metal surfaces in contact. It works in the fastening and sealing system of internal components, absorbing tightening stresses and preventing fluid leaks—whether lubricating oil or coolant—at the joints where it is installed. Its proper function is essential to maintain the integrity of the assembly: a deformed or deteriorated washer can cause pressure losses, persistent micro-leaks or progressive loosening of the fastening element, compromising motor operation. Reference 09160-20042 is the appropriate replacement part for Suzuki DF8A, DF8AR, DF9.9A, DF9.9AR (from 2010), DF9.9 and DF15T-K3 engines, and is also interchangeable with OMC/Johnson/Evinrude reference 5032967.

When to replace this part?

Washers of this type should be replaced when signs of excessive crushing, galvanic corrosion on the contact surface, or deformation that prevents uniform seating under the corresponding bolt or stud are observed. It is recommended to replace it whenever the component that incorporates it is disassembled, since the tighten-loosen cycle reduces its sealing capacity irreversibly. As a preventive maintenance practice, it should be inspected at each seasonal service and replaced if there is any doubt about its condition, thus avoiding unexpected leaks that could lead to major failures during navigation.

Compatible Johnson/Evinrude Engines

Equivalent manufacturer references