For M-Tronic models, you may need to pull the starter rope slowly 2–3 times to energize the internal capacitor if a backup battery step is not built into your specific cable kit.
This is critical for machines like the MS 500i (injection chainsaw) or certain i-Matic models. If a technician replaces an injector or the throttle body, the ECU often needs to be "told" to relearn the parameters or run a calibration routine to ensure the air/fuel mix is correct. stihl diagnostic software 2.0