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I am having a problem with the chain on my poulan chainsaw. the chain comes loose or comes off after just a few cuts. am i missing something or could it be a malfunction
Re: I am having a problem with the chain on my poulan...
It sounds like the chain is not being set quite tight enough. Turn the tightening screw until the chain barely lifts above the bar when pulling on the middle of the chain.
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I have found that the number one reason for a loose chain is from stretching, and that comes from heat or clearing small brush.
Heat being that it is not oiling properly and wears quicker, and the small brush answer (cutting lots of 1/2 in Buckthorn) tends to jerk the chain and manually stretches rather than a steady cut in a log which tends to be smoother.
With that said, yours might be something else. If I can ask a few question... When the saw was purchased, did you install the bar and chain? Second your level of experience - and is this your first saw. What I need to rule out is that the bar could be on wrong.
This saw was more than likely built by Poulan and it should have 2 nuts holding the bar. Does the bar loosen up? If the answer is no you might have a bar that is miss matched to the chain. What that means is that the chains "drivers", the tooth that is down in the bar could be a .050 and the bar could be a .063, hence the chain wobbles more that it should and might be more prone to jumping off.
Solution: Replace bar and chain and make sure they are a matched, lastly, always cut with a sharp chain.
The chain adjuster does not actually hold the guide bar, that is done by the bar nut/nuts, the main reason for chains coming lose is inadiquate chain oil to the bar/chain, does the chain look dry? it can also be the result of what you are cutting, if it is very dirty timber or railway sleepers.
make sure the little tooth on the end of the adjuster for the chain is locked into the groove its supposed to go into and tighten it down.
Note: the chain is supposed to get loose on you but not as quickly as it is. maybe after an hour or so of cutting.
and as for it not cutting well, the chain may need sharpened.
if it has been sharpened once by someone than take it to someone esle if it is not satisfactory.
Your chain would have to be incredibly loose to slip the sprocket. Enough that it would come off the bar before jumping the teeth on the rear sprocket. Highly unlikely.
check the cog that the chain runs on, the one on the back of the centrifugal clutch they are supposed to be changed when you change the bar ((i dont bother until iget symptoms like yours or the chain starts to get tight and loose tight and loose)
We can see no more detail than can you. This is a collection of chainsaw enthusiasts that may provide a better answer. Be prepared for a little grief because you a Poulan. ArboristSite.com Chainsaw thread http://www.arboristsite.com/forumdisplay.php?f=9 GL Lou
did you adjust the chain before you tighten the bolts
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