Janome AirThread 2000D Professional - Locate Lower Looper Arm Bolt; Adjust Lower Looper Arm Position

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Lower Looper Timing
 Locate the 7mm hexagon bolt at the bottom of
the lower looper arm.
 To adjust, loosen the 7mm hexagon bolt slightly
at the bottom of the lower looper arm, and
move the lower looper arm into position. Then
tighten the screw.
Be sure to check clearance
after this adjustment