Outdrive Mounting Hardware Kit – Fits MerCruiser Alpha One Gen 1, Gen 2 & Bravo Drives (Replaces 859116Q01, 11-859116Q01)
Outdrive Mounting Hardware Kit – Fits MerCruiser Alpha One Gen 1, Gen 2 & Bravo Drives (Replaces 859116Q01, 11-859116Q01) 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).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Outdrive Mounting Hardware Kit – Fits MerCruiser Alpha One Gen 1, G...
Product Details
This Outdrive Mounting Hardware Kit contains the stainless steel nuts and washers required for mounting MerCruiser Alpha One (Gen 1 & Gen 2) and all Bravo series sterndrive units to the gimbal or bell housing. It ensures a secure and corrosion-resistant connection for your sterndrive assembly.
This kit serves as a direct replacement for Mercury/MerCruiser OEM part numbers 859116Q01 and 11-859116Q01.
- Designed for use when mounting the outdrive to the gimbal/bell housing.
- Constructed from high-grade stainless steel for superior corrosion resistance in marine environments.
- Includes all necessary nuts and washers for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 859116Q01 |
| Mercury/MerCruiser | 11-859116Q01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This hardware kit is compatible with MerCruiser Alpha One (Generation 1 and 2) and all Bravo series sterndrives.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| MerCruiser | Alpha One Gen 1 | All | All | 859116Q01, 11-859116Q01 |
| MerCruiser | Alpha One Gen 2 | All | All | 859116Q01, 11-859116Q01 |
| MerCruiser | Bravo One | All | All | 859116Q01, 11-859116Q01 |
| MerCruiser | Bravo Two | All | All | 859116Q01, 11-859116Q01 |
| MerCruiser | Bravo Three | All | All | 859116Q01, 11-859116Q01 |
Technical Specs
- Product Type
- Outdrive Mounting Hardware Kit
- Installation
- Used to mount outdrive to gimbal/bell housing
- Housing Material
- Stainless Steel
- Connection
- Mounting hardware for bell housing
- Other Technical Attributes
- Contains 6 stainless steel nyloc nuts and 6 stainless steel washers
What’s in the Box
- 6 x Stainless Steel Nyloc Nuts (Part of 859116Q01)
- 6 x Stainless Steel Washers (Part of 859116Q01)
Installation Notes
- Ensure the engine is off and the battery is disconnected for safety.
- Carefully align the sterndrive unit with the gimbal/bell housing, ensuring the driveshaft splines and shift linkages are correctly engaged.
- Place a washer and then a nyloc nut onto each of the mounting studs.
- Tighten the nuts in a crisscross pattern to ensure even pressure. Refer to your specific service manual for the correct torque specifications. Do not overtighten.
- Once installed, reconnect the battery and test the drive for proper operation and check for any water leaks around the transom assembly.
Troubleshooting & FAQ
How do I know if this kit fits my specific sterndrive?
This kit is designed for all MerCruiser Alpha One (Gen 1 & 2) and Bravo (One, Two, Three) models. The best way to confirm fitment is to check if your existing hardware's part number matches the references 859116Q01 or 11-859116Q01.
Why is stainless steel important for marine hardware?
Stainless steel offers excellent resistance to rust and corrosion, which is critical in both freshwater and saltwater environments. This ensures the hardware maintains its strength and integrity over time, preventing catastrophic failure.
What are the signs of failing outdrive mounting hardware?
Symptoms of failure include excessive vibration from the transom area, a noticeable looseness in the sterndrive unit, or water leaking into the bilge from around the bell housing connection. Regular inspection is recommended.
Is a torque wrench required for installation?
Yes, using a torque wrench is critical. Applying the correct torque as specified by the manufacturer ensures the nuts are tight enough to prevent loosening from vibration but not so tight as to damage the studs or housing.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out 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.
Payment & Security
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