Singer The SINGER 160 Instruction Manual 5 - Page 13

It is necessary to adjust the thread tension for the seams shown below. [ADJUSTING THE NEEDLE THREAD TENSIONS] The left needle thread tension is too loose. The right needle thread tension is too loose. Back side Back side Front side Tighten the left needle thread tension. Front side Tighten the right needle thread tension. [ADJUSTING THE LOOPER THREAD TENSIONS] The lower iooper thread is tight and/or the upper looper thread is loose. The upper looper thread is tight and/or the lower looper thread is loose. Back side Back side Front side Loosen the lower looper thread tension and/or tighten the upper looper thread tension. Front side Loosen the upper looper thread tension and/or tighten the lower looper thread tension. - 12 -