The Singer Simple 3337 is a mechanical sewing machine designed for beginners and everyday sewing. It features 23 built-in stitches, a 4-step buttonhole, adjustable stitch length and width, built-in needle threader, top drop-in bobbin system, free arm capability, and includes essential accessories. Powered by a standard household outlet. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.
Key components: Sewing machine head, foot pedal, power cord, accessory box, instruction manual.
| Feature | Description |
|---|---|
| Built-in Stitches | 23 stitches including straight, zigzag, stretch, and decorative |
| Buttonhole | 4-step buttonhole for consistent results |
| Stitch Length/Width | Adjustable dials for customization |
| Built-in Needle Threader | Simplifies threading the needle |
| Top Drop-in Bobbin | Easy bobbin insertion and viewing |
| Free Arm | Removable accessory tray for sewing cuffs and sleeves |
| Stitch Selector Dial | Select stitches with a simple turn |
| Reverse Stitch Lever | Reinforce seams at beginning and end |
| Tension Control Dial | Adjust thread tension for balanced stitches |
| Presser Feet | Includes all-purpose foot, zipper foot, buttonhole foot |
Unpack and inspect contents. Place on a stable, flat surface.
WARNING! Keep fingers away from the needle area during operation. Always unplug the machine when not in use or during maintenance.
Plug in the machine and turn the handwheel toward you to raise the needle to its highest position.
CAUTION! Do not force the handwheel. If it becomes difficult to turn, check for thread jams or incorrect bobbin placement.
Main Controls: Stitch Selector Dial, Stitch Length Dial, Stitch Width Dial, Reverse Stitch Lever, Tension Control Dial, Handwheel.
Stitch Selection: Turn dial to corresponding stitch number. Refer to stitch chart on machine.
Stitch Length: Adjust from 0 (basting) to 4 (longest). For most seams, use 2.5.
Stitch Width: Adjust from 0 (straight) to 5 (widest zigzag).
Tension: Dial numbered 0-9. Standard setting is 4-5. Adjust if stitches are loose or puckered.
Presser Feet: Lift lever to change feet. Ensure presser foot is lowered before sewing.
Follow these steps for common sewing tasks.
Tip: Always test stitch settings on a scrap of your project fabric before sewing.
Regular maintenance ensures optimal performance.
CAUTION! Always unplug the machine before cleaning or maintenance. Never immerse in water.
Standard accessories included:
Optional Accessories: Available for purchase: quilting foot, blind hem foot, gathering foot, edge/joining foot.
Singer provides a 25-year limited warranty on the machine head and a 5-year limited warranty on electrical components. Proof of purchase is required. This warranty covers defects in materials and workmanship under normal household use. For warranty service, contact Singer Customer Service at 1-800-4-SINGER or visit www.singer.com. Keep your receipt and warranty card in a safe place.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Machine does not run | Not plugged in / Foot pedal not connected | Check power cord connections at machine and wall. Ensure foot pedal is firmly plugged in. |
| Thread bunching underneath | Incorrect bobbin threading / Upper thread not in tension | Re-thread bobbin and upper thread completely. Ensure presser foot is up when threading upper thread. |
| Needle breaks | Wrong needle type / Bent needle / Fabric pulled | Replace with correct needle (130/705H). Do not pull fabric; let feed dogs move it. |
| Uneven stitches | Incorrect tension / Dirty machine | Adjust tension dial. Clean lint from bobbin area and feed dogs. |
| Skip stitches | Dull or damaged needle / Incorrect needle for fabric | Replace needle. Use ballpoint needle for knits, sharp needle for wovens. |
| Buttonhole not forming | Steps performed out of order / Stitch width too narrow | Follow the 4-step sequence precisely. Increase stitch width for thicker fabrics. |
Reset: Unplug machine for 2 minutes to reset electronic components (if applicable).
Service: For repairs not covered here, contact Singer Authorized Service Center. 1-800-4-SINGER; www.singer.com