Step 1-Cut the thread that is in your machine already. Cut it up close to the top where your thread is hooked. Replace those spools of thread with the new colored spools. I started with White and will be switching to Navy Blue
Step 2-Tie a double knot joining your original thread with your new thread.
Step 3-Pick on of the threads down by your presser foot and start pulling very slowly, making sure the thread doesn't get hung up anywhere. If it does then find where it is getting hung up and without unthreading the machine help the thread through the tough spot. For me on my Bernia 1150MDA it is where the thread goes through the tension disks.
Step 4-Repeat with the remaining threads, until you have all 4 threads pulled all the way through.
Step 5- Then do a quick test sergering on a scrap piece of fabric and you should be good to go with your new thread in your machine
And your DONE! Simple, Right?!?
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How to Easily Bind a Quilt Tutorial