The saw has spark at the plug, but the fuel pump doesn't prime.
Q: Can I download Stihl Diagnostic Software 2.0 for free? A: No. It is only distributed to authorized STIHL dealers. Pirated versions are often malware.
Q: Does Version 2.0 work on my old MS 261 C-M? A: Yes, provided the saw has a diagnostic port (usually located near the handlebar or flywheel cover). It supports all M-Tronic generations.
Q: Do I need the MDG 1, or can I use a generic USB cable? A: You need the STIHL MDG 1 interface. The cable contains specific signal conditioning hardware to protect the ECU and read the proprietary voltage levels.
Q: Why is my software stuck on "Searching for Device"? A: Check that the tool’s battery is charged (if cordless) or the engine ground is attached. Also, ensure no other diagnostic software (like for cars) is using the COM port.
