Discovered that I have to turn key to 'start', for @5-10 seconds without clutch pushed in so engine won't crank. This charges the glow plugs. Engine starts right up after doing this. Figured this out after some trial and error. So apparently my manual is not correct, as there is no 'left' key position. Thanks for everyone's input. Apparently this tractor doesn't like cool weather at all. I was always told hard cold starts were not much of an issue in the South, so that's why I thought there was a mechanical / fuel issue.
This is what I found out for my Branson 4720i (2008).
This is what I found out for my Branson 4720i (2008).