Replace your T540 XP Mark II with the exact factory Genuine Husqvarna AutoTune™ carburetor, OEM part number 586341402. This is the latest-generation electronic AutoTune carb that automatically adjusts itself for altitude, temperature, fuel quality, and air filter condition — delivering perfect performance every time you pull the trigger.
Important: This is a brand-new, unprogrammed AutoTune carburetor. It must be programmed to your specific saw before use.
We offer FREE professional programming! Just provide your saw’s product number, serial number, and ignition coil part number at checkout (or email us after purchase), and we’ll flash the carburetor with the correct map before it ships.
Get your T540 XP Mark II running perfectly again — order the Genuine AutoTune Carburetor #586341402 today and let us program it for you. In stock and ready to ship from HL SUPPLY!