what do I use?

rasbury

I have another thread on touching up my outdrive, the grounding wire that goes to the upper part of the out drive I broke off the bolt that secures it. So, I will drill and tap a new hole for it. I have two questions, first there has to be something to isolate the stainless steel from the aluminum for corrosion. The other question, it did not appear there was a bare surface there for contact to the drive for the wire loop and the head of the bolt to make contact, should there be?

Handymans342

No, the wire loop touches the screw and the screw threads touch the metal housing

aero3113

Can you drill out the stainless screw that broke and use an EZ out instead of drilling a new hole? Or drill out the stainless screw all together and then tap to the next size up?

raybo3

Try a left handed drill bit. Works great.....

rasbury

Since I was able to twist off the head of a stainless steel bolt, I don't see any point in trying to go after the remaining portion- it's pretty simple to drill and tap a new hole compared to doing that- plus, the hole is already plugged so I don't have to worry about that either!