The spool gun is discontinued and in order to weld aluminum, you would need to purchase another spool gun for another Lincoln machine and buy the proper modules to run it. I said the hell with it and mated mine with the Lincoln K2532-1 Magnum 100SG Spool Gun designed for the Lincoln 140-180.

Works well might I add. I need to buy a new four pin female adapter so I can rid myself of the wire splices. I wonder what part # that is! My welder is ancient yet works sooooo damn smooth I’m loving it! I will not spend 1500USD on a damn spool gun that I’ll rarely use occasionally. The Gun is rated up to 180amps and I run it at 100% duty cycle at those numbers all day without problems.