Chain keeps coming off the chainsaw

[swimmer_spe]

I was using my chainsaw today. I was using it for most of the day, going after trees under 4 inches. The chain would keep coming off. After using it for about a half hour, the chain would come off. I would put it back on, and within a half hour, off it came again.

Anyone know why it would come off that often?
I did adjust it right, and it is not all the way to the end of the adjustment.

Is there a way to test it to see if it has stretched too much?

 

[havasu]

If it falls off, tighten the adjustment screw, and keep her oiled up good.

 

[swimmer_spe]

If it falls off, tighten the adjustment screw, and keep her oiled up good.

Should it fall off that often?

 

[havasu]

Not unless you have a bent bar, or it is too loose. Your instructions should tell you how much slack is required on the blade.

 

[swimmer_spe]

Not unless you have a bent bar, or it is too loose. Your instructions should tell you how much slack is required on the blade.

It was as tight as it should be each time I put it back on.
Sounds like my bar is the issue.

 

[Blue Jay]

Are you sure the chain is getting oil?

 

[swimmer_spe]

Are you sure the chain is getting oil?

Chain wasn't clean, so I think so.

 

[havasu]

Pull the chain off and soak it in oil overnight. Then try some more adjustment tomorrow.
Also, remove the bar and lay it on a flat surface and look for pinch points.

 

[Eddie_T]

I have an Oregon self sharpening chain saw that is hard to keep the chain on. Seems like if it gets into the slightest bind it will throw the chain. It has a weird looking drive sprocket.

 

[BuzzLOL]

Chain should be tight enough that a gentle pull on the middle of it will only lift it a small amount... like 1/16-1/8"...

 

[swimmer_spe]

Chain should be tight enough that a gentle pull on the middle of it will only lift it a small amount... like 1/16-1/8"...

Each time I put it back on, it was.

 

[RedneckGrump]

You are positive it's the right chain... I've used and owned many many chainsaws... and have never experienced that problem... Ever...

 

[BuzzLOL]

Each time I put it back on, it was.

Did you recheck it occasionally to make sure it was staying tight?

 

[swimmer_spe]

You are positive it's the right chain... I've used and owned many many chainsaws... and have never experienced that problem... Ever...

It has been on it for over a year, and I am now having issues.

Did you recheck it occasionally to make sure it was staying tight?

Within a half hour of running, it comes off. Generally I would check it every time I use it, every time I fuel it up, or every time it is sharpened.

 

[RedneckGrump]

I'd buy another chain, and compare them, and try the new chain...

 

[swimmer_spe]

I'd buy another chain, and compare them, and try the new chain...

I'll check the bar first and it if is good, that is my next step.

 

[bud16415]

I remember a a thread a short time ago about doing a deep cleaning of a saw.

Was this done?

 

[swimmer_spe]

I remember a a thread a short time ago about doing a deep cleaning of a saw.

Was this done?

Not yet.
Taking the cover off the area where the chain goes to the engine, it is actually quite clean.

 

[BuzzLOL]

Within a half hour of running, it comes off. Generally I would check it every time I use it, every time I fuel it up, or every time it is sharpened.

Could check the chain tension each 15 minutes to see if the adjustors are slipping...

 

[swimmer_spe]

Could check the chain tension each 15 minutes to see if the adjustors are slipping...

Visually, the tensioner was at the same location as when I had it off to put the chain back on the last time. It isn't the issue.