Shift Shaft Bushing Kit – Fits MerCruiser Alpha One Gen II (Replaces 23-806036A1, 18-3760)
Shift Shaft Bushing Kit – Fits MerCruiser Alpha One Gen II (Replaces 23-806036A1, 18-3760) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Shift Shaft Bushing Kit – Fits MerCruiser Alpha One Gen II (Replace...
Product Details
This Shift Shaft Bushing Kit is designed for MerCruiser Alpha One Gen II sterndrive units manufactured from 1991 and later (serial numbers F094775 and up). The kit provides the essential components to repair or service the shift shaft assembly in the bell housing, ensuring smooth and reliable shifting.
It serves as a direct replacement for MerCruiser part 23-806036A1 and interchanges with Sierra 18-3760, GLM 87562, and Mallory 9-72162.
- Installation Method: Press-in components.
- Materials: Features durable brass/bronze bushings and high-grade polyurethane seals.
- Kit Contents: Includes two bushings and two seals for a complete service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 23-806036A1 |
| Sierra | 18-3760 |
| GLM | 87562 |
| Mallory | 9-72162 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser applications, this kit is specific to Alpha One Gen II sterndrives with serial number F094775 and up.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | Alpha One Gen II | Up to 300HP | 4-Stroke | 1991–Present | 23-806036A1 | For sterndrives with S/N F094775 & Up |
Technical Specs
- Product Type
- Shift Shaft Bushing Kit
- Installation
- Press-in
- Housing Material
- Brass/Bronze (bushing), Polyurethane (seals)
- Housing Color
- Bronze
- Weight
- 0.11 lbs (0.05 kg)
- Fitting Type
- Press-fit
- Other Technical Attributes
- Kit includes two shift shaft bushings and two seals
What’s in the Box
- 2 x Shift Shaft Bushings
- 2 x Shift Shaft Seals
Installation Notes
Installation requires pressing the old bushings out and the new ones into the bell housing. Ensure the bushings are seated correctly and the seals are properly oriented to prevent leaks. Due to the need for specific tools and proper alignment, professional installation is highly recommended to ensure a watertight seal and correct shift function.
Troubleshooting & FAQ
How do I know if this kit fits my MerCruiser sterndrive?
This kit is specifically for MerCruiser Alpha One Gen II models made from 1991 to present. Crucially, your sterndrive's serial number must be F094775 or higher. Check your serial number plate on the drive unit to confirm compatibility.
What are the signs of a worn or failed shift shaft bushing?
Common symptoms include difficulty shifting into or out of gear, a loose or wobbly feel in the shift mechanism, and water leaking into the bilge from the bell housing area where the shift shaft passes through. A visual inspection may also reveal visible wear or corrosion around the bushing.
Where are these bushings and seals installed?
These components are installed in the bell housing of the Alpha One Gen II sterndrive, where the lower shift shaft passes through. They create a seal to prevent water from entering the gimbal area while allowing the shift shaft to rotate smoothly.
What tools are required for installation?
You will typically need a seal puller, a bushing driver or press, and basic hand tools. To avoid damaging the bell housing or the new components, it is crucial to use tools that are the correct size for pressing the bushings in and out. A specialized tool like a blind hole puller set can be very helpful.
How often should these components be replaced?
There is no fixed replacement interval. They should be inspected for wear, hardness, or leaks whenever the sterndrive is removed for other service and replaced as needed. It is good preventative maintenance to replace them if you are already servicing the gimbal bearing or U-joints.
Is there a difference between OEM and this aftermarket kit?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials, such as brass/bronze for the bushings and durable polyurethane for the seals. Our parts are manufactured in an ISO 9002 facility and are batch-inspected to ensure quality and consistency.
How much is shipping and how fast will I get my order?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most regions. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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