Lincoln mig 255 delayed wire feed speed. When the trigger is depressed (no mather the feed rate you choose) it starts to feed at a low rate for 5-7 seconds then it speeds up to the chosen speed.

Check the trigger and the associated wiring back to the machine.

Hi:
Here's your link to Lincoln/s SP255
http://www.lincolnelectric.com/assets/servicenavigator-public/lincoln3/im533.pdf
Have a good day, don't forget to rate me.

Its probably the contactor its self that needs replacing.

It could be just the simple problem of the trigger not working. Disconnect the trigger wires from the machine at the plug at the front of the machine. See if you can manually trigger the machine by placing a piece of bent over mig wire onto the contacts. If the machine does trigger from this then your fault is in the torch somewhere. It could be the trigger (which commonly does fault from a dusty environment) which is easily replaced by going into any welding store with the torch model number (magnum 250L), or it could possibly be that a trigger wire has broken from the torch being damaged

I'm having a problem with the wire feed on my Lincoln Pro Mig 140. The wire feed speed is not consistant. It seems to be slipping even though the tension is tight. Any solutions?

My Century 225 mig has lost its power ...with adjustments to max it leaves a high weld deposit and low penertration.

What is the fix ?

check the aerth [ground cable & connections]

Either the trigger mechanism in the gun is bad, the servo that turns the feed wheel is bad, or you have too much tension on the adjustable tensioner knob. Take the wire out of the feed wheel, plug unit in and see if you can get the wheel to turn. If not, it is the trigger or the servo. If it turns, the tensioner was too tight.

try readjusting your feed rollers(tension),plus make sure that your feed rollers are set for the right size wire your using.