PRIMER compatible with Dolmar - Echo - Husqvarna - Shindaiwa - Stihl - Walbro models: 021, 023, 025, BT 120 C, BT 121 FC 44, FR 350, FR 450, FR 480, FS 36 FS 40, FS 44, FS 120, FS 200 FS 250, FS 300, FS 350, FS 400 FS 450, FS 480, FS 500, FS 550, MS 150 C MS 150 TC, MS 181, MS 192 C MS 192 T, MS 192 TC, MS 193 C MS 193 T, MS 193 TC, MS 210 MS 211, MS 230, MS 250 MP