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

This kit provides the essential stainless steel hardware for securely mounting MerCruiser Alpha One (Generation 1 and 2) and all Bravo series sterndrive units to the gimbal/bell housing.

Engineered to meet or exceed OEM specifications, these components ensure a reliable and corrosion-resistant connection for your outdrive system.

• Direct replacement for a straightforward installation.
• Constructed from high-grade stainless steel for maximum durability and resistance to marine environments.
• Kit includes all necessary nyloc nuts and washers for a complete 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

• 6 x Stainless Steel Nyloc Nuts
• 6 x Stainless Steel Washers

Installation Guide

1. Safety First: Ensure the engine is switched off and disconnected from the power source. Trim the outdrive to a level and accessible position.
2. Align Components: Carefully align the sterndrive unit with the mounting studs on the gimbal/bell housing.
3. Install Washers: Place one stainless steel washer on each of the six mounting studs.
4. Secure Nuts: Thread a stainless steel nyloc nut onto each stud by hand until snug.
5. Torque to Spec: Following a crisscross pattern, tighten the nuts to the manufacturer's recommended torque specification to ensure even pressure. Do not overtighten.
6. Final Inspection: Once tightened, verify the drive is securely attached to the bell housing and check for any play or movement.

Troubleshooting & FAQ

How do I confirm this kit fits my MerCruiser drive?

This kit is confirmed to fit all MerCruiser Alpha One (Gen 1 & Gen 2) and Bravo (One, Two, & Three) sterndrives. It is a direct replacement for OEM part numbers 859116Q01 and 11-859116Q01. We recommend visually comparing the hardware to your existing parts before installation.

What are the signs that my mounting hardware needs replacement?

Key indicators include visible rust or corrosion on the existing nuts and washers, a loose feeling or rattling from the sterndrive, or excessive vibration from the stern area during operation. Regular inspection during maintenance is recommended.

Are these stainless steel parts different from the original hardware?

These components are made from high-quality stainless steel designed to offer superior corrosion resistance compared to standard steel. They are built to meet or exceed original equipment specifications for fit and function.

OEM vs. Aftermarket?

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.

How fast do you ship and how much does it cost?

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.

What is your warranty and return policy?

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.