worn out sprocket = chain hard time moving?

[Mitt]

Hello all!
I have a saw that would start and work. Now It starts and the chain has a hard time moving. It will cut but only at really high RPM. I took the clutch off to look at the needle bearing. Every thing looked good except the sprocket/clutch cup. Big grove in it. I will replace it anyhow but my question is if this is the source of my despair? (and should I replace the chain at the same time?). Will a badly worn sprocket cause the chain difficulties in turning?
Thanks
M

 

[jeeptj19992001]

yup

 

[SawTroll]

If that is happening, the sprocket has to be really badly worn - get a new rim and drum set-up, and report back!

 

[alderman]

Also make sure the bar roller sprocket (if it has one) turns freely as this can keep the chain from turning.

 

[From009to090]

Run it with the bar off, to check your oiler. Dry chains are hard to turn on dry bars.

Doubtfull, but by chance, your not running a .063 gauge chain on a .050 guage bar?

 

[Mitt]

If that is happening, the sprocket has to be really badly worn - get a new rim and drum set-up, and report back!

Yes. It has a 1/8 groove in the middle of each tooth.

 

[Fish]

You will need a new chain too.

 

[BloodOnTheIce]

This one caused the saw to acted like the chain brake was on.

 

[Fish]

OK guys, a contest. Let us see the worst!


View attachment 220243

 

[nick 55]

You guys win, I've never let one get that bad.

Nick

 

[robfromaz1977]

A coworker had me work on his saw and had the same problem.

 

[Fish]

You guys win, I've never let one get that bad.

Nick

No, I have actually seen worse. I don't use them much, just fix them. Which is why I recommend that the o.p. get a new chain with his sprocket.