I just solved this dilemma myself.
Click on Configure for Slic3r. Click on Filament settings. If you are having the same issue as I did, the filament diameter is set to 3. Use a caliper to measure the ACTUAL diameter of filament you are using at the time. For example, my red ABS that came with my SD2 measures at 1.78; but fearful of clogs, I set the filament diameter to 1.82
Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!