I've never seen it but what z or zx has this on the rear of the starter?

Maybe on a 280z as i never owned that type.. but what's the function of this rubber grommet on the end of this starter? I can't think of anything.. under that rear part are the brushes and the collector..

Thanks !

That's to drain off the extra electrons so they don't fill up the starter.

 Or if it's Lucas, it's a smoke fitting.

I thought maybe it's for coolant in/out from a AC equipped version?  sigh.. 

31 minutes ago, Mark Maras said:

 Or if it's Lucas, it's a smoke fitting.

Home Before Dark!!

In all seriousness, I would assume it's an air vent to let the ozone out?

2 hours ago, Captain Obvious said:

In all seriousness, I would assume it's an air vent to let the ozone out?

Really??

There is stuff on the internet, of course.

https://advancedstructures.in/starter-motor-teardown-and-feature-study/

More.  Larry B can't be wrong...

 

 

9 hours ago, Patcon said:

"In all seriousness, I would assume it's an air vent to let the ozone out?"

Really??

Serious. The electrical arcing in the motor brushes creates ozone.

Here's a snippet from wikipedia >> https://en.wikipedia.org/wiki/Ozone

Incidental production:

Ozone may be formed from O2 by electrical discharges. Unsuppressed arcing in electrical contacts, motor brushes, or mechanical switches breaks down the chemical bonds of the atmospheric oxygen surrounding the contacts.

Certain electrical equipment generate significant levels of ozone. This is especially true of devices using high voltages, such as ionic air purifiers, laser printers, photocopiers, tasers and arc welders. Electric motors using brushes can generate ozone from repeated sparking inside the unit.

Who'd a thunk it!!

Thanks Zedhead for the info.. you gave ...  on April 1st..