Necchi 3537 machine needle still goes up and down when I turn wheel to loosen

Suspect the machine is seizing due to lack of regular cleaning and oiling.


Wheel on right side that controls the needle up and down is very tight...

There are a number of things that could cause this.
Needle installed with flat in the wrong direction.
Excessive thread tension,top or bottom.
Lack of lubrication. If the machine can do anything more than a straight stitch the mechanism can gum up and not move the needle correctly.
Here is a link to threading directions.
Necchi 3537 Sewing Machine Threading Diagram

here is a link for a manual
http://www.sewusa.com/Sewing_Machine_Manuals/Necchi_Manuals/3537_Instruction_Manual.htm

I have a necchi sewing machine also & I use SCHMETZ universal 90/14
they work on my machine just fine & I make clothes & quilt

Its been idle for too long and needs a good service. Try and trickle some oil behind the stop motion wheel. But what it actually needs is to have the wheel removed and then apply oil to the shaft. Careful when you start again as oil will fly out from the wheel so mind your drapes and wall decor.

Open the face plate and bobbin area to see if there is a thread jam.

There should be a button in the balance wheel on the left side of the machine. Not sure on your model, but most of the Necchi's pull out and push in. That disenguages the needle arm to wind a bobbin. Some of them screw in or out, but generally pull out. You might try pulling it out and then pushing it back in, until it clicks. Then it should work fine.

Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} all machines thread the same. TTN tension, take up, needle.
Beginning with the spool, guide the thread through the thread guides to the tension assembly. Pull the thread through the tension assembly and test it to make sure the tension is working correctly.
(To do this test, adjust your tension setting to normal or medium or 5 or something in the middle. Raise the presser foot and pull the thread through the tension. It should pull easily!! Lower the presser foot and pull the thread. It should pull noticeably harder.) If it passes this test, continue up through the take up lever,then down through the thread guides to the needle. Make sure your needle is fully inserted and turned the correct way.FLAT to the BACK.

Sewman7

Remove the needle, and place a screwdriver or something like it under the needle bar to keep the wheel from turning.
Wrap the knob in some type of fabric to keep it from being marred.
Using channel locks or water pump pliers, grasp the knob and turn it to the left. It should come loose. Once it is loosened, try it 2 or 3 times to make sure it works as it should.
Wind the bobbin, insert a new needle and have fun again.
sewman7

Not knowing what type of machine you have I just have to say there are three letters to remember... T-N-T. Thread, Needle, Tension. Since this is obviously not a tension problem you have to make sure the machine is threaded correctly. Incorrect threading will cause this as will the bobbin in upside down and turning the wrong way. Then there is the needle. Be sure it is inserted properly. My opinion is the needle is in wrong or the bobbin is turning the wrong way. Good Luck. Rick