On Monday, May 1, 2017 at 8:21:54 AM UTC-4, wrote:
Speaking of old tractors, I can't get a good contact to the battery
terminal on my old Ferguson. I cleaned the post and connector off with
a (3M) green scrubbie, but when I clamp it together and push the starter
button I get a puff of smoke from the terminal as I vaporize some small
section of lead where the terminal connector meet. Is there some goo
or other tricks I can use?

George H.

Don't know what kind of terminal this is, but make sure that a) you have a shiny, clean surface. if all you have done is polish up the corrosion, that isn't going to help. b) make sure you have a solid contact with as much surface area as possible. If you're clamping two flat surfaces together, make sure the bolt head is large enough, or use a washer. Otherwise you will distort the terminal enough to reduce contact area. You shouldn't need any "goo," though that would be helpful for discouraging future corrosion. Vaseline works pretty well.