1976 Chrysler 105 need help changing gear oil, can’t identify plug and vent screw

[Arashi]

Hi All,

I’m new to the boating community and just bought a 1976 Chrysler 105. I was having some trouble figuring out where the plug and vent are for changing the gear oil. Could anyone help me figure out which is the plug and which is the vent I would greatly appreciate it, thanks.

 

[The Force power]

The one on the left is the vent / right is fill
The one ALL THE WAY @ the BOTTOM is the drain, NOT the one in the center of the body is for shifting-mechanism
(IF you remove that; you be pulling the entire LU apart to correct your mistake)

 

[jerryjerry05]

They say fill until it comes from the vent.
I fill then pump it back out the fill hole.
That way I'm sure it's full.