Oil pump drive wheel Stihl MS170, MS180, MS171, MS181, MS211...

Oil pump fits Stihl MS251, MS250, MS231, MS230, MS211, MS210, MS181, MS180, MS171, MS170, 025, 023, 021, 018, 017 chainsaws

The oil pump drive wheel also contains a rod that goes to the clutch drum.

Replace original numbers:

Stihl 11236472400 + 11236407102, 1123-647-2400 + 1123-640-7102, 11236472400 + 11236407105, 1123-647-2400 + 1123-640-7105