Description
SIERRA MerCruiser Reverse Gear Ball Bearing – 18-1155
Ball bearing used at the reverse-gear/propeller-shaft area on selected MerCruiser sterndrives. It is a common gearcase rebuild component and is also supplied within Sierra bearing repair kit 18-1404 for later Alpha One Gen II drives.
- Reverse-gear/propeller-shaft ball bearing
- Gearcase service replacement
- Included in Sierra 18-1404 repair kit
- Inspect adjacent gear and shaft surfaces before installation
- Match OE number for exact fit
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: 18-1155
- Application: Selected MerCruiser R, MR, Alpha One and Alpha One Gen II gearcases; verify serial number.
Interchange / OEM References
- MerCruiser 30-88957T
- MerCruiser 30-88957A1
- MerCruiser 30-88957
- GLM 21620
- Mallory 9-75114


Reviews
There are no reviews yet.