Most used sewing machines are better than they look in the listing, and a few are much worse. It's whether the handwheel turns, whether the wiring is safe, whether the part that actually makes the stitch is in the box, and whether the machine will survive the trip to you. This guide walks through the checks in the order we'd do them, mostly from the seller's photos and a short video, so you can ask the right questions before you pay.
Start with the handwheel
Ask the seller to turn the handwheel toward them by hand and film the needle going up and down through a few stitches. On a healthy machine it turns smoothly with no stiff spot, no grinding and no click. A stiff or frozen wheel is the most common thing you'll see on an old machine, and the usual cause is lubricant that has dried and gummed up after years in a closet.
That's often fixable. Singer's own manuals for the 15-91 and 201-2 say that if a machine runs hard after standing idle, you put a little kerosene in the oiling places, run it fast, wipe it clean and oil it again. Singer's adjusters manual lists gummed lubricant first among the reasons a machine runs slowly or won't run, and adds that a dry machine will bind. Not every stiff wheel is old oil, though. A thread jammed between the hook and its race does the same thing, and a machine kept in a cold room runs stiff until the oil warms up. The Bernina 930 manual tells you to bring it into a warm room an hour before sewing.
What you're trying to avoid is a machine that's stuck because something is broken or rusted. Ask whether it turns at all, whether it was stored somewhere damp, and whether anyone has forced it. A wheel that spins freely without moving the needle is usually just the clutch knob in the middle of the handwheel left loose, which is there so you can wind a bobbin.
Oil and grease are different jobs
Old machines have oil holes and, on many, grease points. Singer's potted motors on machines like the 15-91 and 201-2 have two grease cups that take motor lubricant, and the manuals are blunt about it. Never put oil or ordinary grease in the motor. Oil can run onto the motor's commutator and stop it working properly. The Featherweight Shop says smoke from a Featherweight motor almost always means someone put oil in it instead of grease. So ask what the seller has used on the machine, and be wary of anything sprayed with a household lubricant. A machine that sat for decades has no fresh grease in it, whatever the listing says.
Some later machines go further. The gear-driven Singer 401A takes grease on its gears and never oil. The Husqvarna Viking 6440 was built not to need routine oiling, and its original lubricant is known to harden until the machine freezes, which on that model is a job for someone who knows it.
Wiring and the foot control
Look closely at every cord in the photos, including the power lead, the motor lead, the light and the foot control. Old rubber insulation dries out and cracks, and on a Featherweight the light cable is the one most likely to have perished to bare wire. Tape wrapped around a cord is a sign of trouble, not a repair. Ask for a video of the machine running slowly with a light press on the pedal, then faster. A machine that only runs flat out, or won't stop, has a controller problem.
Singer's electrical manual lists the controller's carbon resistance unit as the cause of uneven speed, a motor that won't stop and a motor that won't start, and it lists wrong connections at the three-pin terminal on the machine among the reasons a machine won't start or stop. Many Singers of the 1930s to 1950s use Bakelite foot-button controllers, and a cracked case is worth a close look. If you're not comfortable checking wiring, budget for a rewire and don't plug in a machine with cracked cords.
A simple test, also from Singer, separates a motor fault from a stuck machine. Slip the belt off and press the controller gently. If the motor runs, the trouble is in the machine, not the motor. Don't run a motor fast with the belt off.
The bobbin case or shuttle is not optional
Under the slide plate is the part that actually makes the stitch, and it's the part most often missing from listings. Different machines take different systems, and they don't swap:
- Class 15 bobbins sit in a removable bobbin case, as on the 15-91.
- Class 66 bobbins drop in horizontally, as on the 201-2, 99K, 401A and 500A.
- The Featherweight and the 301 take their own thinner bobbin.
- Vibrating-shuttle machines like the Singer 27 use a long bullet bobbin in a shuttle.
- Berninas, Pfaffs, Necchis, Elnas and Vikings each have their own cases and hooks.
Ask for a photo of the bobbin case or shuttle out of the machine, with a bobbin. Singer's UK history site warns not to mix metal and plastic bobbins, and the Featherweight Shop says replica Featherweight bobbin cases rarely form a proper stitch. A missing original case can turn a bargain into a hunt. Treadle-era shuttles are brand specific too, and reproductions exist mainly for Singers.
Skipped stitches start with the needle
Sellers often write that a machine "skips" and blame the timing. Every factory manual we checked lists the needle first, whether it's in wrong, bent, blunt or the wrong size for the thread. Singer's UK history site says about a quarter of machines taken in for repair are fixed by changing the needle. Orientation differs by machine. A Singer 15 or Featherweight takes the flat side to the left, a Necchi BU takes it to the right and the Bernina 930 takes it to the back.
The needle system matters too. Most home machines take the flat-shank 130/705H system, also listed as 15x1, but some take something else, and industrial machines use round-shank needles that don't fit. On a Class 15 machine Singer pinned the shuttle timing at the factory, so it only moves if the machine has taken a real knock. So ask the seller to fit a new needle of the right system and film a test seam on two layers of cotton. The stitch should look the same on both sides with no loops underneath.
Feet, cams and the things that came in the box
Presser feet come in different shanks. Low shank and high shank feet don't swap, and Singer's slant-needle machines from the 301 on take slant-shank feet only. Berninas, Elnas and Vikings use their own feet. Many zigzag machines also need cams or discs to sew anything beyond plain zigzag. The Singer 403A needs a disc even for zigzag, and the Elna Supermatic runs its patterns from Elna discs. Count them in the photos and ask which ones are there.
Read the serial number
A photo of the serial number tells you a lot. On a Singer, the letters show the factory and roughly when the batch was allocated. Our Singer serial number guide explains how to read it. On other makes it at least confirms the exact model, which tells you the bobbin, needle and feet to expect. On a Kenmore, the full number on the plate is the only way to know which 158 you're looking at.
Packing and freight
Heavy machines are easily damaged in the post. TreadleOn, a long-running treadle collectors' site, says never to ship a machine in its wooden case, to take the head off its base, and to remove the needle, presser foot, bobbin, attachments and pedal. Spool pins, handwheels, bobbin winders and needle bars are the parts that snap. It recommends double boxing with at least four inches of firm packing on every side, so that nothing moves.
So ask the seller how they'll pack it, and for a cabinet, a treadle or an industrial, plan on collecting it yourself. A cheap machine far away can cost more to get home safely than a better one nearby. When you're ready, browse every machine we cover, and use each page's checklist on the listing in front of you.
