Ms150 problem

[Neil T]

Hi all. My ms150 chain stops rotating and appears to be clogging up constantly. This has only developed recently,  saw and bar 4 yrs old. Even when cleaned it soon stops, chain tension ok. Any thoughts please. 

[spudulike]

Sounds like the bar tip sprocket is failing or has been damaged. Best fit a new bar and chain and try that.

Not sure what the "clogging up" bit is! I take it the oiler is functioning OK?

Point the bar tip at a piece of clean wood and rev flat out, it should leave a line of fresh oil in 2-3 seconds.

Edited May 22, 2021 by spudulike

[adw]

Surely it’s not oiling?

[Dan Maynard]

Was it 150s that can feg up under the flywheel?

[spudulike]

2 hours ago, Dan Maynard said:

Was it 150s that can feg up under the flywheel?

Yes but the OP said the chain stops rotating. Flywheel clag will just make the idle die in my experience!

[Dan Maynard]

Yes but the OP said the chain stops rotating. Flywheel clag will just make the idle die in my experience!

Fair point, makes sense.

[Moose McAlpine]

On 22/05/2021 at 19:08, adw said:

Surely it’s not oiling?

 

It might be oiling, and don't call me Shirley.

[spudulike]

Looks like the OP has pissed off in to the sunset!

[Neil T]

A thorough clean under the flywheel helped hugely, it was pretty choked up. I'll try a new bar too and clean it more . Many thanks Neil 

[Rich Rule]

Put some petrol in the oiler and blow out thoroughly to clean and then test to make sure it’s flowing.

 

I worked at one firm where 4 of the 5 had the problem you describe.  The 5th one had an exhaust mod.  It never got clogged.  My theory is that the mod either gives the saw a bit more torque and/or chain speed.  Either way, it seems to clear the debris better when compared to standard.

 

I have 2 150t’s that have been modded and they rarely clogg up in the same way.