Yesterday I bought me a Lincoln 140 and i have a bottle of 75% argon and 25% oxygen with it.I plan on welding the back half of my bronco on and a windshield frame.What size tip on the gun should i use and what size wire?I was also wondering if any one has a Lincoln instructional CD i can have?

Congrats man - great choice. The CD is great to get ya started. I would guess it is on YouTube.

I've been watching a lot of stuff like this:

http://www.5min.com/Video/Learn-How-To-Weld-170918437
http://www.youtube.com/watch?v=HtvtNJnn ... re=related

Search around, it's out there.

I also found this:

http://www.youtube.com/watch?v=BsDxqb2p5OM

Might pick up the DVD, seems like it could be a good way to get started. I'll keep posting up as I find good resources.

I'm pretty sure I have the CD. I'll see if I can find it and get with you to send it. Best tip/wire diameter for light gauge is .025 with the gas. May have to change the liner to use .025 though.
Mark.

My Lincoln SP-140T doesn't require a liner change for .25 wire. Val, if 71 isn't able to get you his CD, I'll make a copy of mine for you. Just turned up today.

thanks for the offer 71Broncman but i don't have a VHS.I have another question for you guys.I went and got some wire today and they said they don't carry .025 and i called other places and they said the same so i got .023.Now I have it set up for .025 the plate inside and the wheel.Can i use this set up or do i have to go buy and buy a plate and wheel?

I dunno, 25% oxygen could be pretty entertaining, as long as you're not too close...

I've had a couple of patients that refused to stop g while wearing oxygen. Couple of interesting mishaps. One of them had a line burned across his carpet where the part that goes in his nose caught fire and the tubing flashed all the way across the room to the tank. Coulda been really bad.