Singer 112w 115 timing adjustment for larger needle and stitch length changing help needed.

[Constabulary]

here is a 112w manual but the machine in the manual has a different stitch length mechanism everything else should be the same.

Have you threaded both needle from the correct? 

112W139-inst.pdf

[DMH]

Yes, I double checked the threading.  When threading I go off the manual (which is not that good) and a youtube video.  The tensioner on my machine seems to have these little notches that I'm not sure is part of the threading process.  The video I followed didn't mention it.

My left needle seems to mostly dialed in.  I will be checking everything again and testing on different fabrics next, then move on to the right needle.

Thanks for the 139 manual, I will take a look at it before I start any of my next steps.

I would mention that since my machine is needle feed (slightly moving towards the back of the machine when going down)and doesn't have the timing marks on the needle bar, it was a little difficult getting the exact lowest point of the needle bar.