Shift Lever & Bushing Kit – Fits MerCruiser MC-I, R, MR, Alpha One & Alpha One Gen II (OEM 45518T1)
Shift Lever & Bushing Kit – Fits MerCruiser MC-I, R, MR, Alpha One & Alpha One Gen II (OEM 45518T1) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Shift Lever & Bushing Kit – Fits MerCruiser MC-I, R, MR, Alpha ...
Shift Lever & Bushing Kit – Fits MerCruiser MC-I, R, MR, Alpha One & Alpha One Gen II (OEM 45518T1) is backordered and will ship as soon as it is back in stock.
Product Details
This Shift Lever & Bushing Kit is designed for compatible MerCruiser stern drive applications including MC-I, R, MR, Alpha One, and Alpha One Gen II. It provides replacement shift lever and bushing components to help restore proper shift mechanism operation.
The primary OEM reference for this product is 45518T1. GLM aftermarket reference 21144 is also associated with this shift lever kit.
- Designed for MerCruiser MC-I, R, MR, Alpha One, and Alpha One Gen II applications
- Includes shift lever and bushing components
- Aftermarket replacement kit for compatible stern drive assemblies
Part Number Matrix
Use the references below to compare the product with the part you are replacing. Confirm the application and component configuration before ordering.
| Brand or Reference Type | Part Number | Notes |
|---|---|---|
| Mercury Marine OEM reference | 45518T1 | Primary OEM reference for the shift lever kit |
| GLM aftermarket reference | 21144 | Aftermarket shift lever kit reference |
Engine & Model Compatibility
This kit is listed for the following MerCruiser stern drive series. Compatibility should be confirmed by comparing the original shift lever, bushing arrangement, and OEM reference.
| Brand | Model or Drive Series | Application | OEM Reference |
|---|---|---|---|
| MerCruiser | MC-I | Stern drive shift lever application | 45518T1 |
| MerCruiser | R | Stern drive shift lever application | 45518T1 |
| MerCruiser | MR | Stern drive shift lever application | 45518T1 |
| MerCruiser | Alpha One | Stern drive shift lever application | 45518T1 |
| MerCruiser | Alpha One Gen II | Stern drive shift lever application | 45518T1 |
Technical Specs
- Product Type
- Shift lever and bushing kit
- Application
- MerCruiser stern drive shift mechanism
- Compatible Drive Series
- MC-I, R, MR, Alpha One, and Alpha One Gen II
- Primary OEM Reference
- 45518T1
- Aftermarket Reference
- 21144 GLM
What's in the Box
- Shift lever
- Bushing
Installation Notes
- Disconnect the battery and shift cable from the stern drive before beginning work.
- Remove the existing shift lever and inspect the mounting area, shaft interface, and surrounding components for corrosion or damage.
- Clean the mounting surface and remove any old bushing material or debris.
- Install the replacement bushing in the correct position and ensure it is properly aligned with the shift mechanism.
- Position the replacement shift lever and secure it using the original hardware when serviceable.
- Reconnect the shift cable and check operation through neutral, forward, and reverse positions.
- Complete a stationary function test according to the applicable service manual before launching the boat.
Troubleshooting & FAQ
How do I know if my shift lever or bushing needs replacement?
Common symptoms include excessive play in the shift mechanism, difficulty selecting gears, inconsistent shifting, binding, or visible wear around the lever and bushing. Inspect the complete shift linkage before ordering replacement parts.
Does this kit fit Alpha One Gen II drives?
The company fitment for this product includes Alpha One Gen II. Because shift components can vary by drive configuration, compare the existing part and the primary OEM reference before installation.
Does this kit fit MC-I, R, and MR drives?
Yes. The listed company fitment includes MerCruiser MC-I, R, and MR stern drive applications, in addition to Alpha One and Alpha One Gen II.
Do I need special tools to install this kit?
Basic hand tools may be sufficient for removal and installation, but the exact procedure depends on the drive assembly. A torque wrench is recommended where specified by the service manual.
Can I replace only the bushing?
This product is supplied as a shift lever and bushing kit. If only one component appears worn, inspect both parts and the surrounding shift mechanism before deciding whether additional service is needed.
What causes shift lever bushings to wear?
Normal shifting activity, friction, corrosion, contamination, and exposure to the marine environment can contribute to wear. Regular inspection can help identify looseness or binding before shifting performance is affected.
Safety & Important Info
- Verify the drive series, original component configuration, and OEM reference before purchase.
- This is an aftermarket replacement kit and is not manufactured by Mercury Marine.
- Do not rely on model-family names alone when confirming fitment; consult the applicable service information for your specific drive.
- Professional installation is recommended when the shift mechanism is corroded, damaged, or difficult to adjust.
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