sp 100 gas leak

admin

hi i have a lincoln sp100 welder,it started to leak gas from nozzle without me pushing on triggger.when i turn off welder selenoid closes, and when i flip the switch to on i hear the selenoid open.does anyone have an idea what it might be?
Reply:It may be a pre-flow to purge air, dirt, or whatever from the gas line prior to welding.  Check your manual.  Or you could turn off the welder, turn off the gas, then turn the welder on and wait 60 sec or so then turn the gas back on to see if it leaks