After tummy tuck in Lipo can my drains be removed 9 days post op the fluid is yellow?

The color is likely not a reason for concern but talk with your plastic surgeon about his or her opinion.  Every surgeon has different recommendations but it's important that you know what's happening with your own body.

Dear Chan1,every plastic surgeon has his own postoperative protocol which he recommends to his patients. I would suggest you to discuss this with your plastic surgeon.Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Every surgeon has a specific protocol; most recommend the drainage be both yellowish/clear in color AND less than 25-30cc per 24 hours before removal, in order to minimize the risk of seroma accumulation. I find this is usually somewhere in the range of postop day 10-17 for most patients who do not have significantly elevated BMI. Check with your surgeon's office.