Crankshaft oil seal
Suits 021, 023, 025, MS210, MS230, MS250, MS231, MS251
This oil seal can be fitted without the need of dismantling the engine.
Part number: 9638 003 1581
Flywheel side oil seal
Suits the following model Stihl chainsaws:
Stihl 046, 064, 066, MS460, MS461 (not the MS660)
OEM Part number: 9640 003 1355
13.5mm x 20mm x 4mm