Lower Gimbal Housing Steering Pin – Fits MerCruiser Alpha One Gen II & Bravo Drives

Lower Gimbal Housing Steering Pin – Fits MerCruiser Alpha One Gen II & Bravo Drives (Replaces 17-99353, 8M0073409)

This steering pin is a critical component for MerCruiser sterndrive systems, providing a secure connection point for the steering arm in the lower gimbal housing. It offers a precise fit for MerCruiser Alpha One Gen II models from 1991 and newer, as well as all Bravo series drives.

This component is a direct replacement for Mercury/MerCruiser part numbers 17-99353 and 8M0073409, ensuring compatibility and performance equivalent to the original equipment.

• Installation Type: Direct OEM replacement
• Housing Material: High-strength steel for durability
• Package Includes: Steering pin, cotter pin, and washer (when sold as a kit)

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

When sold as a complete kit, this package includes:

• 1 x Lower Steering Pin (Replaces 17-99353/8M0073409)
• 1 x Cotter Pin (Replaces 18-54929)
• 1 x Washer (Replaces 12-32518)

Note: Some retailers may sell the steering pin individually without the cotter pin and washer. Please verify the contents with your vendor before purchasing.

Installation Guide

Installing the lower gimbal housing steering pin can be a complex task that may require specialized tools. Professional installation is highly recommended. The general steps are outlined below:

1. Safety First: Disconnect the boat's battery before beginning any work.
2. Access the Gimbal: Trim the sterndrive to the full "up" or "trailer" position to access the gimbal housing area.
3. Remove Steering Arm: Detach the tiller arm nut and remove the steering arm from the top of the old steering pin.
4. Extract Old Pin: Using a slide hammer or a specialized puller tool, carefully extract the old steering pin from the gimbal housing. This step can require significant force.
5. Clean and Inspect: Thoroughly clean the bore in the gimbal housing where the pin sits. Inspect for any damage or corrosion.
6. Install New Pin: Lubricate the new steering pin and the housing bore. Carefully press or tap the new pin into place until it is properly seated.
7. Secure the Pin: Install the new washer and secure it with the new cotter pin.
8. Reassemble: Re-install the steering arm and tighten the tiller arm nut to the manufacturer's specified torque.
9. Test Operation: Turn the steering wheel from lock to lock to ensure smooth, unimpeded movement.
10. Final Check: Reconnect the battery and test the power steering system if applicable.

Troubleshooting & FAQ

Q: How do I confirm this steering pin fits my sterndrive?

A: The most reliable method is to check your sterndrive's model and serial number against the "Compatible Engine Models" table. This pin is designed for all MerCruiser Bravo drives and Alpha One (Gen II) drives from 1991 and newer. Do not rely on visual comparison alone.

Q: What are the symptoms of a failing lower steering pin?

A: Common signs of a worn or failing steering pin include excessive "slop" or play in your steering, a clunking sound when turning the wheel, or difficulty steering. A visual inspection may also reveal corrosion or looseness where the pin passes through the gimbal housing.

Q: Can I install this part myself?

A: While self-installation is possible for experienced mechanics, it often requires special tools like a slide hammer or a dedicated pin removal tool. Due to the difficulty of removing the old pin and the importance of a correct fit for steering safety, we recommend professional installation. You can find visual guides, like the referenced YouTube tutorial, to assess the job's complexity.

Q: OEM vs. Aftermarket?

A: 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.

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

A: 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.

Q: What is your warranty and return policy?

A: 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.