SIERRA MerCruiser Alpha Tapered Roller Bearing – 18-1161

Description

SIERRA MerCruiser Alpha Tapered Roller Bearing – 18-1161

Tapered roller bearing used in a broad range of MerCruiser stern-drive gearcases. It is a precision gearcase bearing for applications requiring both radial and thrust-load support.

• Tapered roller bearing
• Broad MerCruiser sterndrive application
• Supports radial and thrust gear loads
• Suitable for gearcase overhaul and repair
• Verify gear ratio/serial number before installation

For marine engine and drive parts, fitment can vary by serial number, gear ratio, casting, or prior service history. Compare the original part number and physical configuration before installation; replace related gaskets, seals, races or hardware when their condition requires it.

Specifications

• Manufacturer: Sierra
• Part Number: 18-1161
• Application: MerCruiser IA/IB/IC and EZ Shift, MC-I, R, MR, Alpha One, Alpha One Gen II and Vazer applications; commonly excluded from 1.32-ratio drives.

Interchange / OEM References

• MerCruiser 31-35990A1
• OMC 983891
• GLM 21540
• Mallory 9-75122