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[MAC702]

You need a voltage meter and the experience of troubleshooting inside a machine while it's powered. After that you test to see where the voltage goes (or doesn't go) when the trigger is depressed. If it makes it to the contactor but the contactor doesn't pull in, that's your problem. If it doesn't make...

[MAC702]

If all the fittings are designed to connect to each other well, even with adapters, there is no issue going back and forth with different hose diameters, if that is the basic question.

[MAC702]

That's a fair point. I can tell you that I've never looked at someone's video in a thread. If there's a pic, I'll look at it, but not a video.

[MAC702]

Runs on idle and full speed before the welding load? What about a load on auxiliary power?

A bent pushrod is one of many things that can cause this symptom. That's usually from low oil, but your machine, for all I know, might not use pushrods or be able to start with low oil.

[MAC702]

It's not just the software, which absolutely sucks now*, but the moderators flat out are absent and don't care about keeping the forum running smoothly and cleaning up around here.

*Another example is when I reply with quote, and it puts it in a text editing box so small that even when...

[MAC702]

I bought their big green plasma cutter this year. Have only used it a few times, but so far so good.

[MAC702]

And then there's a water pump that can be the part to fail......