As for the CM, use basic troubleshooting steps. Most likely, it’s nothing to do with the Mtronic system.
But people always go for the most complicated problem first.
It has a very conventional carb on it BUT it is not interchangeable with a non Mtronic
The Mtronic components are screwed on.
Good 441 Piston I’m about to put in the saw with scored Piston View attachment 834247
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