Hi Deb;
Excellent advice there from Bill. I will just add the following. I do not have specific instructions for the W&W machines. However several makes recommend the needle Rise for 2.4mm or 3/32" depending upon the standard you use, At that point of rise the point of the hook should center on the needle & be in the scarf area. Do keep in mind the #8 threads right to left as do the 9's. On the #8's with external bobbin tension (no spring on the case) the thread "MUST" come off the bottom of the bobbin toward you in loading the bobbin so it pulls up in front of the bobbin. Turn it around & it will not sew, just don't ask me how I know.
Miller/TN