Hobart tigwave 250 acdc manual1/16/2024 ![]() As mentioned in the thread I linked, as thermal arc does not stock replacements, your best hope is to gently clean the points with some emory cloth or similar Given that it's an old machine though unfortunately I doubt its an issue of your spark gap being too small and most likely burnt/corroded points. The further the gap, the stronger the HF, I believe some people report greater than about 0.010 can nearby interference with radios etc. Looking at pictures of the machine, there seems to be a square access port of sorts on the front of the machine that may provide access to the HF spark gaps as it's generally considered routine (every 3-6 months) to check to adjust them, the gap should be 0.008 in, yes you'll need what's called a feeler gauge set, which is basically a set of very thin shims, you can find a set here. Well, I can tell you what the issue is, how to fix it, might be a bit more tricky, you need to adjust your spark gap, as I cannot find a manual anywhere online, the most info I can find is it was made by thermal arc and this thread.
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