MS440 Magnum engine die at high speed

[Geoffroy]

Hi
My MS440 started last fall to chock when I was using it. In a middle of a cut at high speed the engine just stop right away. If I'm fast enough I can release the accelerator an be able avoiding the engine stop. During winter as dismantle the saw and change cylinder and piston. Everything was ready for a good maintenance. At the same time I also changed gas filter and check on/off switch. After all this work I run the saw. I start well but it seems I have exactly the same issue.

If I run the saw mid speed (half trigger down) I can run the saw without problem, but when I push the saw at the maximum, immediately it dies. Again if I'm fast enough, I can avoid it dies by releasing the trigger. Is someone have any Idea about this issue.

Thank you

 

[the woolfe man]

have you tried adjusting carburetor?

 

[Geoffroy]

have you tried adjusting carburetor?

No but I just read an article about that and I will be my next thing to try. Good advice, thank you. I will give results of this next try

 

[the woolfe man]

how did the 440 go did you get it running?