Let your Mtronic saw idle for at least 10 seconds before shutting it off. If you take a cut and then shut the saw off immediately, the ECU still thinks it's running WFO and makes the mixture richer than needed for starting. For me this mostly affects hot starts but might affect cold starts too.
If you think it's flooded, then move the lever from start to run, lock the brake and start it with the throttle held open. The easiest way to do this is to drop start it but you may be able to figure out how to hold the throttle open while starting it another safer way. With the throttle open the carb will flow a lot more air but little fuel. This will clear out the engine in about five pulls. One of them may start the engine if it's gotten the fuel:air mix close enough, hence locking the brake so the chain does not move. You could put the lever on 'off' if you want, which would be safer, and then put it back to start after 5 pulls.
This works just as well on regular carb saws as it does on Mtronic saws.