Any hints on properly stopping internal thread corrosion?

[accentphoto]

How do you stop the corrosion that happens with threaded fasteners going into the Mercury Mariner block? Look at the photo to see what I mean. I have some of the waterproof lower unit grease if that helps or hurts? Suggestions? Ideas?

 

[Fishing Dude too]

Re: Any hints on properly stopping internal thread corrosion?

Galvanic reaction is what that is, switch to stainless steel bolt.

 

[Bondo]

Re: Any hints on properly stopping internal thread corrosion?

Ayuh,.... Coat the threads with Merc. Perfect Seal....

Maybe not a Cure, but it Helps...

 

[accentphoto]

Re: Any hints on properly stopping internal thread corrosion?

I think I will rob some of the stainless from my older Merc Thunderbolt 1500 and grease it as well.