ms 150 randomly stops

[Billbigtree]

As the title says my ms 150 randonmly cuts out any help would be appreciate

[Steve Bullman]

idle set right?

[Gnome]

Are you accidentally knocking the choke switch?, easily done.

[Steve Bullman]

Are you accidentally knocking the choke switch?, easily done.

 

Yep I did that a few times till I clocked it

[spudulike]

Does it stop in full flow, on idle, straight away on idle, when throttling down, when left to idle, when the top handle is flexed, on it side, vertical etc..........

[jeanesy]

Sorry to butt in on this one but I have the same issue with mine. It's done it for a while now. I can be cutting and it'll just cut out mid flow. I've drilled the exhaust recently but it's been doing it way before that.

[Billbigtree]

It can do it mid cut or when its running down mainly i think

[Rich Rule]

I have had similar problems with mine. I have fixed it twice now.

 

Symptoms are the saw cuts out mid cut. But then starts up straight away. It cuts out again at the same time angle etc but will start again.

 

The first time this happened I had the carb off 3 times and cleaned and it wasn't an issue. Eventually we found the fault. If you take the side cover off and then remove the really thin sheet of plastic under the handle you will expose some wires. There is an earth wire which connects to the body of the saw. This had come undone and was connecting but then when the saw increased the revs this connection must have broken due to the vibes. Saw cuts out etc... Tightened it up by removing the plastic cover under the clutch and tighten and the problem went away. So might be worth checking that first.

 

The second time, I had the same symptoms and checked the obvious. All good on the connection I described above. So I pulled the plug cover off and the wire came out. There was about 2 mm of bare wire showing. Trimmed back the cover and reinserted in the plug cover and fixed again.

 

Another one to try, but the loose earth connection has happened on a couple of saws.

Edited October 2, 2015 by Rich Rule

[Arbtech Tree Services]

Interesting thread, only had the accidental choke knock so far with mine.

 

Regards,

 

Steve.

[jonnygurkha]

Mine was always a bit spluttery from when I first bought it but recently it would be a pig to start and then would not rev at all, just died. Took it to the dealer, they replaced the fly wheel. So far so good.