OMC Evinrude Johnson Liner

An OMC Evinrude or Johnson Liner refers to an impeller liner, a small, internal part of an outboard motor's water pump. It's crucial component that helps transfer water through the cooling system, preventing overheating. This liner, typically made of rubber or a similar material, is designed to seal against the rotating impeller, ensuring proper water flow.

Here's a more detailed description

Function:

The impeller liner helps create a seal between the impeller and the housing, preventing water from leaking around the impeller and ensuring it's properly circulated through the cooling system

Material:

Liner can be made of various materials, such as rubber, providing flexibility and resistance to water and wear 

Importance:

A worn or damaged liner can lead to poor water flow, reduced cooling, and potentially engine overheating or damage.

Replacement:

Impeller liners are relatively and easy to replace, making them a good preventative