Can anybody help me out on this one. I have a Stihl 088 chainsaw and i can't get the clutch off to examine the oil pump worm gear spring. there seems to be a little slop in it, so it won't stay in the groove that's on the clutch drum. will that cause a problem? i started the saw without the bar and chain and the oil came out just like its supposed to. what exactly does that spring do? thanks in advance.