I just got finished changing the lube in my 95 Mariner Mag III lower unit. The plugs have slot type screw driver 'notches' in them and they need replacing. Some where I read the Evinrude plugs have 'Allen head' "notches" in them.. Anybody know if the thread size and the diameter are the same?? I have a friend that runs a Yammy, will the Evinrude plugs fit on the Yammy?? Really like the idea of using the Allen type plugs, to align when installing, and then tighten without stripping the "notch" Thanks...BF

