Description
SIERRA MerCruiser Shift Slide Screw – 18-2163
Sierra 18-2163 is the dedicated shift-slide screw used in MerCruiser MC-I, R, MR, Alpha One and Alpha One Gen II shift-linkage assemblies. It replaces MerCruiser 10-31700 and is intended as a direct service fastener for the corresponding shift slide.
- Replacement shift-slide screw for MerCruiser Alpha-era drive linkage.
- Cataloged for MC-I, R, MR, Alpha One and Alpha One Gen II.
- Crosses to MerCruiser 10-31700.
- Also cross-references GLM 21090 and Mallory 9-72152.
- Use the specified installation/locking procedure from the drive service manual; do not substitute generic hardware.
For marine drive and engine service parts, fitment can vary by model, serial number, gear ratio, casting and prior service history. Compare the original OEM number and physical configuration before installation, and replace related seals, bearings, locking hardware or cable components when their condition requires it.
Specifications
- Manufacturer: Sierra
- Part Number: 18-2163
- Application: MerCruiser MC-I, R, MR, Alpha One and Alpha One Gen II shift-slide assemblies using OEM screw 10-31700.
- Part Type: Shift-slide screw
- Application: MerCruiser Alpha-era stern drives
- OEM Number: 10-31700
- System: Shift linkage
Interchange / OEM References
- GLM: 21090
- Mallory: 9-72152
- MerCruiser Stern Drive: 10-31700


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