easy adjustment, no need to replace line
The 810 Seafurl is a continuous line. The thickness of the drum slot (with the "teeth" is adjustable. An allen screw on the bottom part of the drum allows the lower part to be adjusted up and down. This will provide more contact with the 7/16" line even if it is worn. Of course, if it is way worn and skinnier in some places then it should be replaced.
However, normal variations can be compensated for by adjusting the drum.