Go to boc and set up account, good gas and you don’t need to be shy with the gas like you do on little throw away bottles. Looks like a gas problem to me ,that and not enough power.
Not sure where to post this yet as new member.
Have a Clark 230 and the problems went like this:-
Welding away and the wire stopped feeding,checked roller and nothing turning.
Looked at the never looked at fuse ant yep it had popped.
Now the bad bit.......didn’t have a fuse that size so...