RE: ZDZ 80 Hard to start
It's not always 5-5-1. The first number can be as much as 20 depending how cold it is, or how well the choke seats etc. Just as Wise Dick Hanson told me, keep flipping until you hear a squishy sound in the cylinder. That's when you know the prime is there. Then you can go on to the 5-1. So for me the other day it was 20-5-1. Listen for the squishy sound or you are wasting your arm/shoulder.
PS: I went to 2T also recently on my 50NG. It runs lean when switching from Pennsoil. You gotta richen the needles a bit, maybe an 1/8 or so. But if you were too rich with the Pennzoil it may be perfect with 2T. My guess is that your low end leaned out and it became harder to start.