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Shift Shaft Bushing Assembly 65529
The 65529 Shift Shaft Bushing Assembly is a Sierra replacement component designed for MerCruiser Alpha One Gen II sterndrives. This assembly supports and seals the shift shaft where it passes through the drive housing, ensuring smooth shifting and proper sealing.
Fitment Overview
This bushing assembly replaces Mercury / MerCruiser part numbers 815921A2, 815921A6, 815921A8, 815921A10, 815921A17, and 815921A21.
These OEM numbers are used specifically on MerCruiser Alpha One Gen II sterndrives across multiple production years.
Compatibility
| Brand | Drive Model | Application |
|---|---|---|
| MerCruiser | Alpha One Gen II | Sterndrive |
| MerCruiser | Alpha One Gen II (various ratios) | Sterndrive |
Commonly used on Alpha One Gen II drives across a wide range of boat applications including runabouts, cruisers, and fishing boats.
Fits These Serial Ranges
Typical application includes Alpha One Gen II sterndrives within serial ranges such as:
- 0D469859 through later Alpha One Gen II production
Important: Always confirm fitment using your sterndrive serial number or OEM part number.
Looking for the OEM version of this part?
View OEM MerCruiser Shift Shaft Bushing Assembly
Part Numbers and Cross References
| Type | Part Number |
|---|---|
| Pro Marine | 65529 |
| Mercury / MerCruiser OEM | 815921A2 |
| Mercury / MerCruiser OEM | 815921A6 |
| Mercury / MerCruiser OEM | 815921A8 |
| Mercury / MerCruiser OEM | 815921A10 |
| Mercury / MerCruiser OEM | 815921A17 |
| Mercury / MerCruiser OEM | 815921A21 |
What This Part Is Used For
This assembly supports the shift shaft and provides sealing where it enters the sterndrive housing. It is critical for maintaining proper gear engagement and preventing water intrusion into the drive.
- Supports shift shaft alignment
- Seals shift shaft entry point
- Maintains smooth shifting operation
- Helps prevent water intrusion into the drive
A worn or damaged bushing can cause shifting issues, leaks, or internal drive damage.
System Function and Connections
- System Type: Sterndrive shifting system
- Component Type: Shift shaft bushing and seal assembly
- Location: Alpha One Gen II drive housing
FAQ
What does this part fit?
It fits MerCruiser Alpha One Gen II sterndrives.
Is this for outboard engines?
No, this part is used in sterndrives only, not outboard lower units.
What does this part replace?
It replaces 815921A2, A6, A8, A10, A17, and A21.
Why is this part important?
It ensures proper shifting and helps prevent water from entering the drive.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Part Numbers
65529, 815921A2, 815921A6, 815921A8, 815921A10, 815921A17, 815921A21, MerCruiser Alpha One Gen II shift shaft bushing
21015
815921A10
815921A17
815921A2
815921A21
815921A6
815921A8
0980900
0982336
18-5369
392-6318T
71570
835702
9-29413