I need a manual for the White Superlock Electronic 1934D Serger

SOURCE: White Superlock 1934D Serger Manual

You can get one from Central Sewing Machines.
1-877-486-0047 they have the book in stock. I just talked to them.

SOURCE: White Superlock Serger 1934D

Either adjust your knife to cut wider or tighten both looper threads.
sewman7

SOURCE: I lost my manual and don't know how to thread the

Here is another singer threading manual
Should be the same.
White Superlock 834DW electronic serger
www.singerco.com/pdf/14SH654_threading.pdf

Singer (white company) has a really good website.
You really want to reinvest in a manual for your machine, they really are a necessity.
Good Luck

SOURCE: I lost my instruction manual fro my serger white

I found a free pdf manual for my 20 year old White serger at singerco.com. Hopefully you can find yours too.

SOURCE: What needle do I replace

I use schmetz universal needles in all my sewing machines or try sewingpartsonline.com