Part Number: 575803501, 545199901 . Compatible with Craftsman: 358381600 . Compatible with Husqvarna: 235 E 236 E 240 E . Compatible with McCulloch: CS340 CS380 966631401 966631402 966631403 966631404 966631405 967027401 966631501 966631502 966631503 966631504 966631505 966631508 966631509 966631506 966631507 966631508 966631509 966631510 967027501 967326201 967326203 967326204 967326301 967326303 967326304 967326307 967326309. This Chainsaw Ignition Module (Part Number: 575803501, also known as 545199901) is the heart of your chainsaw's ignition system. It is responsible for generating the spark that ignites the fuel, ensuring your chainsaw starts quickly and runs reliably for intense felling and cutting work., Weight: 0.2866009406 pounds, Manufacturer: OTOTEC