tune in cable shift 904 anyone got hints?

You did the whole 5 holes clockwise on the wheel from first contact,right? Turning the wheel clockwise would add tension. Did you lubricate the cable? My book only tells how to adjust with push button shifter. It says reverse must be held firmly the entire time til done.( reverse button pushed in firmly.) Maybe you should have the shift lever held by someone or locked down in reverse somehow while its adjusted. If you already have done all this try adding w little tension. Or look into the shifter for a way to adjust it. I will see what info I might find elsewhere. You will get it right.