MS200T doesn't switch off

[AllTrees]

Hi All any ideas please. Saw starts and runs as normal but when I switch back to "0" to turn it off the saw continues to run. I have to choke the saw to make it cut out. Then I have the ball ache of starting it again

 

I opened the handle thinking it meant the switch was just not breaking contact when switched off but it seems a bit backwards and looks like moving switch to "0" actually makes a circuit to kill the saw??

 

The saw does warm start with the switch in "0" position

 

cheers

[woody paul]

switch works by earthing out, check wire to earth point.

[Darrin Turnbull]

It's probably the wire in the picture.

[spudulike]

Yes, green and yellow wire to the rear av bolt