STIHL ENGINE MOTION CLEARER 017 018 019T 020 020T 021 023 025 MS 129 180 190 200 210 230 250 BT 45 BLOWER BG 45 46 55 65 85 BR 45 SH 55 85 STIHL Part No.: 012138 Original part No.: 11231950400A AT