Shift Lever Kit – Fits MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen 2 (Replaces 45518T1)

Shift Lever Kit – Fits MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen 2 (Replaces 45518T1)

This shift lever kit is compatible with MerCruiser sterndrive units from the MC-I, R, MR, Alpha One, and Alpha One Generation 2 series. It is designed for multiple MerCruiser sterndrive applications from 1983 through the present day.

This is a direct aftermarket replacement for Mercury part numbers 45518T1, 45518A3, 23-805041A2, 23-79373A1, 23-79373, and 23-45588. It also replaces popular aftermarket parts including GLM 21144, Sierra 18-2622, and Mallory 9-72161.

• Installation: Direct OEM replacement designed to fit without modification.
• Durable Materials: Features a cast iron shift lever and high-quality brass bushings for longevity.
• Complete Assembly: Includes updated style seals that come pre-installed for a simpler installation.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Shift Lever Assembly (45518A3)
• 1 x Large Bushing
• 1 x Small Bushing
• 2 x Oil Seals (Already installed in the bushing)

Installation Guide

1. Ensure the engine is off and disconnect the battery for safety. Position the sterndrive for safe access.
2. Following your official service manual, disassemble the drive housing to access the shift lever assembly.
3. Carefully remove the old shift lever, bushings, and seals. Clean the component housing of any old sealant, debris, or corrosion.
4. Install the new bushings and shift lever assembly into the housing.
5. Confirm the pre-installed seals are correctly seated to prevent leaks.
6. Reconnect the shift linkage to the new lever and verify smooth movement through Forward, Neutral, and Reverse.
7. Reassemble the sterndrive housing using the correct sealant and torque specifications for all bolts.

Troubleshooting & FAQ

A: This kit fits MerCruiser Alpha One drives from 1983-1990 (serial numbers 6225577-0D469858) and Alpha One Gen 2 drives from 1991 to present (0D469859 and up). Always check your drive's serial number against the ranges listed in the compatibility table.

A: Common signs include difficulty shifting into forward or reverse, a loose or sloppy feeling in the shifter, or the drive popping out of gear. Visual inspection inside the drive may show obvious corrosion or wear on the lever itself.

A: No, this kit is a complete solution. It includes the shift lever, large and small bushings, and two new oil seals that come pre-installed in the bushing for your convenience.

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.