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Aftermarket Oil Seal 15x29.6x4 for Stihl Equipment
Maintain a perfect vacuum and prevent air leaks with this high-quality non-genuine Crankshaft Oil Seal. Measuring 15x29.6x4mm, this seal is a direct replacement for Stihl OEM 9640-003-1600. It is a critical component for ensuring the proper lubrication and fueling of 2-stroke engines across a massive variety of Stihl professional tools.
Wide-Range Compatibility
This versatile seal fits a broad spectrum of professional Stihl machinery. It is essential for the airtight crankcase operation required in high-performance chainsaws, professional backpack blowers, and heavy-duty clearing saws.
Full Compatibility List:
| Chainsaws | MS241, MS260, MS261, MS341, MS360, MS361, MS362, MS441, MS460, MS462, 024, 026, 028, 034, 036, 046, 084 |
| Backpack Blowers | BR320, BR340, BR380, BR400, BR420 |
| Mistblowers | SR320, SR340, SR380, SR400, SR420 |
| Clearing Saws | FS360, FS420, FS500, FS550 |
| OEM Reference | 9640 003 1600 (15x29.6x4) |
⚠️ Mechanic's Warning:
A failing oil seal allows "false air" into the crankcase, causing a lean-run condition that can melt a piston in minutes. If your equipment has an erratic idle or won't tune properly, performing a pressure and vacuum test on these seals is the first step in diagnosis.
🛠️ Installation Tip:
When installing, lightly lubricate the inner lip of the seal with 2-stroke oil. Use a dedicated seal driver or a socket of matching diameter to press the seal in perfectly square. If the seal is cocked even slightly, it will fail to hold a vacuum.
9640 003 1600
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Fits models:
- Stihl 024, 026, 028, 034, 036, 084, MS260, MS241, MS261, MS341, MS360, MS361, MS362, MS441, MS462, BR320, BR340, BR380, BR400, BR420, SR320, SR340, SR380, SR400, SR420, FS360, FS420, FS500, FS550
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Seals 
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