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- Apr 28, 2014
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Neighbor brought a saw over with a strange problem. Chain gets very tight or very loose upon starting and running it for a very brief period.
Seems to be oiling correctly, we tighten the hell out of the bar nuts, even marked the bar against the powerhead and there is no movement of the bar. Chain is 0.063, even checked the DLs with calipers, ran feeler gauges (several 0.021+0.025+ to get to 0.063+) in the groove and it is good, there is no tight or loose spots. I checked the nose sprocket, and it turns good. The clutch sprocket looks new. The chains are in good used condition. Hell the saw is nearly brand new and is a ms271. We tried 2 of his chains, even mounted and old bar and chain of mine (which I know are good!). He's cut about 15 cords with it and this is a recent problem.
He seems to be aware of the saw, and there is nothing strange that suddenly happened, so there is no obvious clue in his usage, i.e no abusive use.
What is the cause, anybody?
Seems to be oiling correctly, we tighten the hell out of the bar nuts, even marked the bar against the powerhead and there is no movement of the bar. Chain is 0.063, even checked the DLs with calipers, ran feeler gauges (several 0.021+0.025+ to get to 0.063+) in the groove and it is good, there is no tight or loose spots. I checked the nose sprocket, and it turns good. The clutch sprocket looks new. The chains are in good used condition. Hell the saw is nearly brand new and is a ms271. We tried 2 of his chains, even mounted and old bar and chain of mine (which I know are good!). He's cut about 15 cords with it and this is a recent problem.
He seems to be aware of the saw, and there is nothing strange that suddenly happened, so there is no obvious clue in his usage, i.e no abusive use.
What is the cause, anybody?