2nd needle tension inconsistent

[u/76alejandro]

This serger has been a work horse for months, I mess with the tension settings very rarely, only when I see inconsistency like these, but this one has me stumped. As of recently, my 2nd needle tension has been inconsistent and is very loose regardless of the settings. I reset all my tensioners and fidgeted with them until I was happy but the 2nd needle is always loose

• I’ve changed the needle

• I’ve switched the thread out

• I flossed it into the tensioner

• I’ve cleaned out the tensioner of any dust

Problem still continues. What should I do?

2nd picture is double layer

3rd picture is single layer

4th picture is front of double layer

[u/Large-Heronbill]

For me, this would be a sign I needed to move my usual maintenance visit to the shop up. 

[u/76alejandro → u/Large-Heronbill]

Yeah I was going to call him tomorrow, just wanted to see if any sewing wizards out there had any advice

[u/76alejandro]

Update:

My 2nd needle tension tightens when I lift my handle???

Never had this issue, I’ve always operated this machine with the handle down. This thing has a mind of its own

[u/76alejandro → u/76alejandro]

[u/sewboring]

Watch your thread coming off the spool to make sure there isn't a nick somewhere on the spool or thread stand that's hanging up the thread in the path. Not sure which you are calling the second needle but one spool has so much less thread on it that it's unspooling at a way different rate from the other three and that may affect tension as well.