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Mcculloch Chainsaw Clutch
I can't adjust clutch on my chainsaw, either the chain moves permanently (even when pulling chord, or when it runs idle), or it won't run at all (even when you press the accelerator to the maximum). I tried adjusting it's nut in smallest steps I could, but it just won't work normally - when it runs idle, chain shouldn't move, when you press accelerator, it should start moving. I've even found online and seen that the necessary torque to tighten that nut is, so I measured the length of my wrench and used scale to pull it with force necessary. In fact, I could only get to only half of the force necessary, because the spring under the clutch was already pressed and deformed to maximum and the nut is too tight again, because the chain moves all the time. So it didn't help. And I've replaced old spring because it became deformed after trying all possible torques on the nut, so the new spring is the one with thicker wire, but with it, same as with original one, the adjustment just can't be done.
Could you tell me what I'm doing wrong and how to do it right, please? This nut is making me nuts, literally. Thanks in advance, if you need some extra info, just tell me please. Thank you guys, I appreciate your effort very much. I see you've got interested in this and I'm really glad you have.
Mccollum Chainsaw Parts
Here, I think it's the best if you see the problem for yourself, I've recorded a 8 minute video showing all the parts in question, trying with both new and old spring and I just can't adjust this thing correctly. I don't see anything wrong on the assembly or it's parts, no key marks, needle bearing looks good and working, nothing else there. Drum looks good to me to, I've tried separating jaws with screwdriver and I could do that (hard to do it but it can be done). So here's the video, if you need some more info or some other details on any of parts, just say. That setup isn't keyed to the crank, but you haven't got enough pressure on the drive from the nut. The shoulder of the crank may be damaged and worn a little.
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