If your Necchi has an external motor, take the belt off and run it.... is the motor sluggish? If so... that's where you start. motors need to be oiled, typically with oil and grease ports on either end of the motor housing.
If the motor spins up nicely,... you need to clean and oil the rest of the machine. Start underneath if the bottom workings are exposed, oil all the places where metal joins metal. Then do the bobbin and feed dog area... then look along the top and sides for oil parts.. give them a drop or two...Finally, see if you can get into the head where the take up lever and such are... oil the needle bar, presser foot bar, etc.
It's a dirty job... so prepare a good space for your machine. Liquid Wrench will help you free up gunked up and rusty parts. Fine grade steel wool (0000) and Cotton swabs help.
Good luck
SOURCE: Replacement bulb for a Necchi 537FA
Any goos sewing mnachine shop or even local stores will keep the bulb, 15W
SOURCE: i have a necchi model number 537fa. the light
If it is a belt problem, you should be able to hear the motor running. If you cant hear the motor running then it has to be the foot control or cord or possibly the motor.
SOURCE: the needle jams when i start sewing
Could be threaded wrong - check manual for proper threading
Needle could be bent - check and replace if needed
Needle plate could be damaged - see if any burrs are on it if so take to service dealer and have removed
Bobbin could be wound wrong - check manual
Bobbin could be bent - if so replace.
SOURCE: I have a Necchi 537FA sewing machine. It sill sew
have you checked to see if the needle is bent-lay the needle on a flat surface & roll the needle over,, if the needle does not roll good -replace
blunt needle-if the needle makes a popping sound when the needle penetrates the fabric,,the needle is blunt-replace
sometimes if the thread comes off the thread take-up lever it can jam the thread in the bobbin area
try rethreading the machine
check to make sure the thread isn't wrapping around the spool pin
check the spool of thread to see if the notch on the spool is catching the top thread
check to see if there's a burr on the bobbin case
I hope one of these suggestions helps you
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