Most damage to flooded sewing machines is caused by rust. Even if the machine was not submerged, check for rust caused by general dampness. Rust develops quickly on highly polished, machined or plated surfaces.
Corrosion can ruin thread handling parts within a few days.
The machine head should be serviced by your local dealer within 10 days if possible. If professional reconditioning is not immediately available, follow this procedure to minimize damage. Head and motor 1. Disassemble the sewing head as for normal cleaning. Clean with a brush and liberal application of cleaning solvent or kerosene.