Harbor Freight Tools 3914 Adjusting the Stitch Length, Adjusting the Needle Thread Tension

Models: 3914

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pulling it to the top of the machine. Pull both threads behind the Presser Foot, leaving at least 4” of excess thread.

Adjusting the Stitch Length

Stitch Length

Dial (46e)

Figure 26

To increase or decrease the stitch length, turn the Stitch Length Dial (46e) to

the desired number (in millimeters) as indicated at (A) above.

Adjusting the Needle Thread Tension

Tension Adjustment

Knob (3a)

Figure 27

1.Turn Tension Adjustment Knob (3a) clockwise to increase thread tension.

2.Turn Tension Adjustment Knob counterclockwise to decrease thread tension.

Adjusting the Bobbin Thread

Tension

Increase

Decrease

Tension

Tension

Tension

Bobbin

Adjustment

Case (21c)

Screw

 

Figure 28

1.Using a small flathead screwdriver (sold separately), turn the Tension Adjustment Screw on the Bobbin Case (21c) clockwise to increase bobbin tension.

2.Turn the Tension Adjustment Screw counterclockwise to decrease bobbin tension.

Raising the Presser Foot

The Presser Foot (9d) can be raised and lowered using the Presser Foot Lever (18d) or the Knee Lifter (21g).

The Knee Lifter raises the Presser Foot momentarily (to a height of up to 1/2”), as long as it is pushed, while the Presser Foot stays in the raised or lowered position when using the Presser Foot Lever.

 

 

REV 10b

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For technical questions, please call 1-800-444-3353.

SKU 3914

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Harbor Freight Tools 3914 Adjusting the Stitch Length, Adjusting the Needle Thread Tension, Raising the Presser Foot