Ford 555c instrument panel lights

[ThatCompostGuy]

What's the round white light on the right panel that looks sort of like water in a funnel? Does that indicate over heating or that I need antifreeze/coolant? Or something else entirely? I've been looking for a picture of the panel with descriptions, but have been unsuccessful thus far.

Thank you.

Chris Behrens
Clemson, SC

 

[RickB]

Sounds like the air filter restriction indicator.

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[Bob Rooks]

A picture of the light you are trying to describe would be helpful.
You can also trace wires from the light to the device or function that it monitors.