B&M starshifter query - no manual 2nd?

Since you say you have 1st and 3rd gear your description does not sound like a shifter adjustment problem. Sounds like a transmission problem. The front band is responsible for the application of 2nd gear. If it's way out of adjustment you can lose 2nd gear. Another common problem is if it gets too far out of adjustment the band strut can fall off internally. The only way to check for this is to drop the pan and inspect it. If it has fallen off it can be replaced and the band adjusted and you'll most likely be good to go. While your in there also adjust the rear band.