Mercury M2 Jet Plug Question

[Lesion]

I have a 2003 Challenger X with a Mercury 240 EFI and I have never noticed this plug at the top of my Mercury M2 jet.

What is it for and should I be concerned that its threads are showing?

 

[Tim75]

I have a 2003 Challenger X with a Mercury 240 EFI and I have never noticed this plug at the top of my Mercury M2 jet.

What is it for and should I be concerned that its threads are showing?

It is part of water block off from the casting process of the wear ring.
Same as the "freeze plugs" (properly known as core plugs) in your car engine.
Not a service point.

 

[Lesion]

Thank you for your reply. So there is no chance this plug could come loose or be dislodged?

 

[Tim75]

Thank you for your reply. So there is no chance this plug could come loose or be dislodged?

It is set in with a Loctite product. Never heard of one coming out by itself.