My murex 165 has stopped arcing machine wire feed working ok

SOURCE: no arc for craftsman professional wire feed welder

either your not grounded on the vehicle very good or you lost the ground either in your gun or on your clamp

SOURCE: No arc/ no burn

You need to inspect the ground.Where it connects to the machine, and at the end. I bet one of the connections or the wire itself is damaged.

SOURCE: circuit board repair, century 117-042-905

I am sure there is one to download. If google is no help, just ask some deep web specialists, e.g. http://manualfox.com/schematic.htm - this is a schematic search agency and if they don´t find it, it does not exist in the Internet.

SOURCE: solar welder 2175 wire keeps feeding wont stop

Look on the front pannel. thier should be a "latching Switch" indicated by "4 X 2" little arrowes. The 4 is " pull the triger -- the release the arc continues, the "2" is pull the trigger and the arc startes release the trigger the arc stops simplesssssssss
Ken

SOURCE: Weld arc not stable. Wire feeds, good ground,

Arc blow could be the cause! Put your ground on the work piece and weld away from it. If you weld toward a ground clamp the magnetic forces will blow your arc around sometime. When taking a cert this simple mistake can make or break ya on your cap or reinforcement beads.