Singer Simple 3337 Instruction Manual

The Singer Simple 3337 is a mechanical sewing machine designed for beginners and home sewers. 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 reverse sewing. Powered by a standard household electrical outlet. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking and Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Stitch Selection Guide 8. Maintenance & Cleaning 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Sewing machine head, Free arm, Stitch selection dial, Stitch length/width controls, Bobbin winder, Built-in needle threader, Foot pedal, Power cord.

Feature	Description
Built-in Stitches	23 stitches including straight, zigzag, stretch, and decorative
4-Step Buttonhole	Easy-to-create buttonholes in four simple steps
Stitch Length Control	Adjustable from 0 to 4 mm
Stitch Width Control	Adjustable from 0 to 5 mm for zigzag and decorative stitches
Built-in Needle Threader	Assists in threading the needle easily
Top Drop-in Bobbin	Easy bobbin loading with clear cover
Free Arm	Removable accessory tray for sewing cuffs and sleeves
Reverse Sewing Lever	Reinforce stitches at beginning and end of seams
Foot Pedal	Controls sewing speed; plug-in type
Light	Built-in LED light illuminates sewing area

Unpacking and Setup

Unpack all contents carefully. Place machine on a stable, flat surface.

Remove machine from box and all protective packaging materials.
Attach the foot pedal: Plug the foot pedal cord into the port on the right side of the machine.
Connect power: Plug the power cord into the back of the machine, then into a standard 120V AC outlet.
Install the accessory tray: Slide the removable accessory tray onto the free arm until it clicks into place.
Wind and insert the bobbin: Follow the diagram on the machine to wind the bobbin and place it in the bobbin case.
Thread the machine: Follow the numbered threading path printed on the machine and use the built-in needle threader.

WARNING! Keep fingers away from the needle area during setup and operation. Ensure the machine is unplugged during initial assembly.

First-Time Operation

Plug in the machine and turn on the power switch (located on the right side).

Select a stitch: Turn the stitch selection dial to choose your desired stitch (e.g., straight stitch #1).
Adjust stitch length/width: Set the stitch length dial to 2.5 mm for general sewing. Adjust width if using zigzag.
Place fabric: Lower the presser foot lever to hold fabric in place.
Start sewing: Gently press the foot pedal to begin. Use the reverse lever to backstitch at the start and end.
Practice: Use scrap fabric to test stitches and tension before starting your project.

CAUTION! Always turn the handwheel toward you (counter-clockwise) to avoid timing issues. Never pull fabric while needle is in the material.

Specifications

Type: Mechanical Sewing Machine
Built-in Stitches: 23
Buttonhole: 4-step manual
Stitch Length: Adjustable, 0-4 mm
Stitch Width: Adjustable, 0-5 mm
Bobbin: Top drop-in, Class 15 transparent
Needle: Standard domestic sewing machine needles (size 11/80 recommended for general use)
Max Sewing Speed: 750 stitches per minute
Power Supply: 120V AC, 60Hz
Light: Built-in LED
Dimensions (LxWxH): Approximately 15.2" x 6.7" x 12.2"
Weight: 13.2 lbs

Controls and Settings

Main controls are located on the front and right side of the machine.

Stitch Selection Dial: Turn to select from 23 stitch patterns. Icons and numbers correspond to the stitch chart.

Stitch Length Dial: Controls the distance between stitches. Higher numbers = longer stitches.

Stitch Width Dial: Controls the side-to-side width of zigzag and decorative stitches.

Reverse Sewing Lever: Press and hold to sew in reverse for reinforcement.

Handwheel: Manually raises and lowers the needle. Always turn toward you.

Bobbin Winder Spindle & Stop: Used to wind thread onto the bobbin. Automatically stops when full.

Tension Dial: Adjusts upper thread tension. Default setting is 4 for balanced stitches on medium-weight fabrics.

Stitch Selection Guide

Refer to the stitch chart printed on the machine or in the manual for specific uses.

Straight Stitches (1-6): For basic seaming, topstitching, and basting. Adjust length for fabric weight.
Zigzag Stitches (7-10): For finishing edges, sewing stretch fabrics, and appliqué.
Blind Hem Stitch (11): For nearly invisible hems on garments.
Stretch Stitches (12-14): For seams on knit and stretch fabrics to prevent popping.
Decorative Stitches (15-23): For embellishing projects. Use with appropriate width and length.
4-Step Buttonhole (marked A-B-C-D):
- Step A: Sew the left side.
- Step B: Sew the bottom bar tack.
- Step C: Sew the right side.
- Step D: Sew the top bar tack.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

Daily: Remove lint and dust from the bobbin area and feed dogs using the small brush provided. Unplug the machine first.
Oiling: This machine is pre-lubricated and does not require regular oiling by the user.
Needle: Replace the needle after every project or if it becomes bent or dull.
Exterior: Wipe the machine casing with a soft, dry cloth. Do not use chemicals or abrasives.

CAUTION! Always disconnect the power cord before performing any maintenance. Never immerse the machine in water.

Regulatory Information

This appliance complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Copyright © Singer Manufacturing Company. Singer® is a registered trademark. For support, visit www.singer.com or contact customer service at 1-800-4-SINGER.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Machine does not run	Power connection	Ensure power cord is plugged in securely at machine and outlet. Check that power switch is ON.
Thread bunching underneath	Incorrect threading/bobbin	Re-thread the upper thread completely. Ensure bobbin is inserted in the correct direction.
Needle breaks	Wrong needle/bent needle/fabric pull	Use correct needle type and size. Replace bent needle. Do not pull fabric while sewing.
Uneven stitches (looping)	Tension settings	Re-thread. Adjust upper tension dial. Ensure presser foot is lowered when sewing.
Fabric not feeding	Feed dogs lowered/thread jam	Check that feed dog lever is in the raised position. Clean feed dog area of lint and threads.
Skip stitches	Dull/bent needle/wrong needle	Replace the needle. Ensure needle is inserted fully and tightened.
Noise/vibration	Lint/thread in hook area	Unplug machine. Remove needle plate and clean bobbin area thoroughly.

Service: For repairs not covered in this guide, contact an authorized Singer service center. Do not attempt to disassemble the machine.