Does anyone know what is plug is ???
Do i need it??

WAS going to plumb power steering cooler from this port, but when i took it apart , i founf this ???

thanks ....

It's an anode. They help protect against corrosion.
Do not plumb any oil in here unless you want to mix it with cooling water.

ahhhhhh,,,,,thanks SB
i thought it had to be something like that...
guess i should try to replace them..
or try to clean it up,,,but look pretty bad...
something else to find....hahaha

ahh,,,, found site boatzinc.com

https://www.boatzincs.com/engine-siz...xoCj7YQAvD_BwE