Genuine Stihl oil seal 9639-003-1205 / 96390031205, size 12×22×4.5 mm. Perfect for MS192C/T/TC, MS193C/T/TC, MS194T/TC, HS46C, HS56C and similar 2-stroke models. OEM-grade seal designed to prevent oil leaks & maintain proper crankcase sealing for reliable performance and extended engine life.

✅ Genuine OEM Part – Stihl-factory oil seal for correct fit and reliable sealing.
✅ Exact Spec Size – 12×22×4.5 mm ensures correct pressure and minimal tolerance, preventing oil leaks or shaft play.
✅ Wide Model Coverage – Fits MS192, MS193, MS194 series (C, T, TC), also HS46 / HS56 models.
✅ Oil & Fuel Resistant Material – Built to withstand crankcase oil, fuel vapor, heat, and vibration.
✅ Restores Crankcase Integrity – Keeps crankcase sealed to maintain compression, consistent idle, and better start-up.
✅ Easy Replacement – Installable using standard tools as part of routine maintenance or overhauls.