Description
SIERRA MerCruiser Carrier Oil Seal Assembly – 18-0577
The SIERRA 18-0577 is a carrier oil-seal assembly for a broad range of MerCruiser stern drives. It services the drive yoke/seal-carrier location on MC-I, R, MR, Alpha One and Alpha One Gen II family drives and replaces several superseded MerCruiser carrier assemblies.
- Carrier and oil-seal assembly for MerCruiser stern drives
- Fits MC-I, R, MR, Alpha One and Alpha One Gen II family applications
- Also listed for earlier IA/IB/IC and EZ-shift applications
- Complete carrier/seal service component
- Replaces multiple MerCruiser superseded carrier assemblies
Confirm the engine or drive model and serial number against the listed OEM interchange before ordering; closely related marine engines can use different gaskets or seals across production changes.
Specifications:
- Product type: carrier oil seal assembly
- Drive families: IA/IB/IC, EZ Shift, MC-I, R, MR, Alpha One, Alpha One Gen II
Interchange / Cross-Reference:
- MerCruiser 35993A1
- MerCruiser 66081A1
- MerCruiser 66081A2
- MerCruiser 66081A4
- MerCruiser 8M0171103
- GLM 28370
- Mallory 9-78100
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