The Stihl SV11280209400 (also commonly known as 11280209400) is a genuine OEM decompression valve designed for various Stihl chainsaw models. This essential component reduces compression during engine starting, making it easier to pull the starter cord and minimizing wear on the starting system. It is a critical part for maintaining the reliability and ease of use of your Stihl equipment across models like the MS 440, MS 460, MS 650, MS 660, MS 880, 044, 046, 064, 066, and 088.