Chris is the M47 expert, but this sounds like a "textbook symptom" of a dragging clutch to my amateur ears. My understanding of this is that the clutch fails to completely disengage, and thus the transmission is still turning at engine speed. (Chris will correct me if this description is not 100% accurate).

The clutch cable needs to be adjusted or replaced. If the cable is original, then it is likely due for replacement. Expect to spend about $80 at the dealer for a new cable.

Also...If you pull up the shift boot (carefully), you will see four press in snaps (2 front, 2 rear) that hold it in. There is a plate on the bolts ("reverse detent bracket") that can be adjusted with an 8mm socket. When this "bracket" is out of adjustment, it can be difficult to shift into 1st and 2nd. If pulling on the reverse collar makes it easier to shift, this may very well be your friend's problem.