Well, I can offer these 2 experiences:
1. It is possible to install the clutch cover with the kicker spring not in the right position (i.e., not wound up and tucked over the nub on the case inside).
2. It is also possible to have a broken kicker spring. Rare, I've only seen 1 like that, but the hooked end on the shaft was cracked and broke off, leaving the little curved piece lying in the bottom of the clutch cover.