SCREWED

[MFB]

Just a thought

http://www.noblefix.com/PDF/Helicoil/HeliCoil-Professional-Kit.pdf

I have used helicoils on carbs, chainsaws & a few other things. Have never fitted ones this small before though. Hope you have good eyes. I wouldn't recommend running a coarse tap into a fine thread of the same diameter.

Rgds

Mark   

[Ron Jones]

Helicoils are fantastic, of course. But I wonder if there is a concern of galvanic action between the stainless and aluminum in salt water?

Ron

[BMITCH]

The helicoils I've done before( only 5mm) this is small. I wouldn't trust them over time as Ron said.

[Cone]

Bob, I did tap a frame out to 8-32. It holds fine. I would like to caution you the tap needs to be straight. Preferably you would use a taper then a plug and then a bottom tap. I would try it out on something like an old post to satisfy its to your liking. Send me your address and I'll send you a post already tapped out.
Bob

[Ron Jones]

Looking at a Heli-Coil flyer, they make phosphor bronze inserts for salt water applications. These and stainless screws would be the absolute correct answer.

Ron