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

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

This lower gimbal housing steering pin is a crucial component for maintaining precise steering control in MerCruiser stern drives. It is designed to fit MerCruiser Alpha One Gen II (1991 and newer) and all series of MerCruiser Bravo stern drives, ensuring a reliable and secure connection within the lower gimbal housing assembly.

This part serves as a direct replacement for Mercury OEM parts 17-99353 and 8M0073409, as well as several aftermarket equivalents. It is manufactured to meet or exceed original equipment specifications for dependable performance.

• Installation Method: Installs as a direct OEM replacement.
• Durable Construction: Made from high-strength steel to withstand the harsh marine environment.
• Complete Assembly: Available as a kit that includes the steering pin, cotter pin, and washer for a full replacement.

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, the 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 before purchase.

Installation Guide

Professional installation is recommended. The following are general guidelines:

1. Safety First: Turn off the engine and disconnect the battery. Securely support the stern drive in a raised position.
2. Locate Pin: Identify the lower gimbal housing steering pin, which connects the gimbal ring to the steering lever.
3. Remove Old Hardware: Carefully remove the existing cotter pin and washer that secure the old steering pin.
4. Extract Old Pin: Slide the worn steering pin out from the housing. This may require gentle tapping.
5. Clean & Inspect: Clean the pin housing and surrounding area of any debris or corrosion. Inspect the housing for cracks or excessive wear.
6. Install New Pin: Align the components and slide the new steering pin into place.
7. Secure New Hardware: Install the new washer and insert the new cotter pin through the hole in the steering pin.
8. Lock Cotter Pin: Bend the legs of the cotter pin to lock it firmly in place, ensuring it cannot back out.
9. Final Check: Lower the drive and test the steering to ensure smooth, responsive movement without any binding or looseness.

Troubleshooting & FAQ

Q: How do I know if this steering pin will fit my MerCruiser drive?
A: This pin is specifically designed for MerCruiser Alpha One Gen II (1991 and newer) and all Bravo series stern drives. To be certain, cross-reference your drive's model and serial number with the compatible models table and verify your old part number matches 17-99353 or 8M0073409.

Q: What are the symptoms of a failing gimbal steering pin?
A: Common indicators include loose or "sloppy" steering, a noticeable "clunk" from the transom area when turning, or excessive play in the outdrive when moved by hand. Visual inspection may also reveal corrosion or wear on the pin itself.

Q: Does this product include the necessary cotter pin and washer?
A: When advertised as a full kit, it includes the steering pin, cotter pin, and washer. However, as some retailers sell the pin alone, we recommend you confirm the package contents before purchasing to ensure you receive all necessary hardware.

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.