Sierra Shift Slide Screw 18-2163, Mercruiser I/O Drive System, for Extreme Cables Only

The Sierra Shift Slide Screw, part number 18-2163, is a small precision fastener used in the shift mechanism of Mercruiser I/O (inboard/outboard) drive systems. It is designated for use with Extreme Cables only, making it a specific replacement component rather than a universal fit for every shift cable setup. This screw plays a role in the shift slide assembly, where correct fit and secure engagement are essential for reliable gear selection and smooth shift operation. Given its small size and precise dimensions of 0.39 x 0.39 x 0.39 inches, it is manufactured to close tolerances so it seats properly within the shift slide hardware it is designed for. At 0.04 pounds, it is a lightweight hardware item intended to be installed as part of a shift cable or shift slide service, repair, or rebuild rather than sold as a standalone visible component. Because shift linkage hardware directly affects whether a drive shifts cleanly between gears, using the correct screw for an Extreme Cables application helps avoid improper engagement or premature wear at the shift slide interface. This part is identified under the Sierra brand and is cross-referenced to equivalent industry part numbers, helping buyers confirm they are ordering the correct hardware for their Mercruiser I/O shift system repair.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2163
• Product Name: Shift Slide Screw
• Application: For Extreme Cables Only
• Drive System: I/O - Mercruiser Drive System
• Weight: 0.04 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 808282257736
• GLM Cross Reference: 21090
• Mallory Cross Reference: 9-72152

Fitment

• Mercruiser I/O Drive System, for Extreme Cables Only

Replaces (OEM)

• 10-31700

Frequently Asked Questions

What is the Sierra 18-2163 Shift Slide Screw used for? The Sierra 18-2163 is a shift slide screw used in the shift mechanism of Mercruiser I/O drive systems, specifically for applications using Extreme Cables.

Will the 18-2163 shift slide screw fit any Mercruiser shift cable setup? No, the 18-2163 is designated for Extreme Cables only, so it should not be assumed to fit standard or other cable types used on Mercruiser I/O drive systems.

What are the dimensions of the Sierra 18-2163 shift slide screw? The 18-2163 measures 0.39 x 0.39 x 0.39 inches, reflecting its small size as a precision shift mechanism fastener.

How much does the Sierra 18-2163 shift slide screw weigh? This screw weighs 0.04 pounds, consistent with its role as a small hardware component rather than a full assembly.

Is the Sierra 18-2163 equivalent to an OEM part number? Yes, the 18-2163 cross-references to OEM part number 10-31700 for buyers matching against original equipment numbers.

Are there other brand cross-reference numbers for the Sierra 18-2163? Yes, the 18-2163 cross-references to GLM number 21090 and Mallory number 9-72152.

Is the Sierra Shift Slide Screw 18-2163 genuine Sierra or aftermarket? The 18-2163 is a Sierra-branded part manufactured as a replacement component for Mercruiser I/O drive system shift hardware.

What drive system does the 18-2163 shift slide screw belong to? It is used within the I/O (inboard/outboard) Mercruiser drive system, specifically within the shift slide hardware for Extreme Cables.

What material is the Sierra 18-2163 shift slide screw made from? The sources for the 18-2163 do not specify a material for this screw.

How do I know if I need the 18-2163 versus a different shift slide screw? The 18-2163 is specifically for Extreme Cables applications on Mercruiser I/O drive systems, so confirming your cable type before ordering ensures the correct fit.