Janome Thread Control Lever Return Vertical Spring
When this spring is broken or popped off and lost when cleaning the area, the lever will then lay on the rotary hook and make a scraping noise.
Only fits janome machines which has the thin metal control lever over the bobbin area,
This spring holds the lever up and allows this to move up and down.
see photo
Some models listed, fits many more.
TXL607, MC7700, MC8200, MC8900, MC9400, 9450QCP
Genuine Part 854126004