Compatible with Husqvarna following chainsaws: 36, 40, 41, 42, 44, 45, 51, 55, 61, 135, 136, 137, 140, 141, 235, 236, 240, 242XP, 254XP, 257, 262XP, 266XP, 268, 272XP, 281 XP. Compatible with Husqvarna 334, 338, 339, 340, 345, 346, 350, 353, 357, 359, 365, 372 XP, 385, 390, 394 XP, 395, 3120, 46, T425, 435, 440 445, 450, 455 Ranger, 455E, 46, 460, 461. Efficient Fuel Filtration: Quality fuel filter effectively blocks dirt and debris to protect engine components and ensure smooth fuel flow. Reliable Spark Ignition: The spark plug delivers strong, consistent ignition for easier starting and stable engine operation under various conditions. Durable Construction: Replace 597919713, built with robust materials for long-lasting durability, even in demanding chainsaw operating environments.