Trim Cylinder Ram Cap – Fits Mercury Marine Alpha One Gen II (Replaces 19-815951, Sierra 18-2466-9)

Trim Cylinder Ram Cap – Fits Mercury Marine Alpha One Gen II (Replaces 19-815951, Sierra 18-2466-9)

This replacement trim cylinder ram end cap is designed for Mercury Marine Alpha One Gen II sterndrive trim cylinders from 1991 to the present. It serves as a direct, reliable replacement for worn or damaged original caps, ensuring proper protection and function of the trim system.

This component directly replaces Mercury part numbers 19-815951 and 8M0214953, along with several other aftermarket equivalents.

• Installation Method: Simple snap-on installation for quick and easy replacement.
• Required Quantity: Each trim cylinder requires two of these caps for complete servicing.
• Package Options: Available as a single cap or in multi-packs depending on the selected variant.

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

• 1 x Trim Cylinder Ram End Cap (Replaces 19-815951)

Note: Each trim cylinder requires two caps. Some aftermarket packages come with multiple caps (2-pack or 4-pack).

Installation Guide

1. Engage the trailer switch to raise the sterndrive to its full-up position for access.
2. Locate the existing trim cylinder ram end caps. They are the small black plastic covers at the pivot points.
3. Using a small flathead screwdriver or a trim removal tool, carefully pry the old cap off the cylinder pin.
4. Wipe the pin and surrounding area clean of any grease or debris.
5. Align the new cap over the pin.
6. Press down firmly and evenly with your thumb until you hear and feel it snap securely into place.
7. Repeat the process for the second cap on the same cylinder and for the other trim cylinder if necessary.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: The most reliable method is to check your sterndrive's serial number against the ranges listed in the "Compatible Engine Models" table above. This part is specifically for Mercury Alpha One Gen II drives from 1991 to present.

Q: How many caps do I need to buy?
A: Each trim cylinder uses two of these caps (one on each side of the pin). If you are servicing both trim cylinders on your sterndrive, you will need a total of four caps. Please check the package quantity before ordering.

Q: Is this cap difficult to install?
A: No, installation is very straightforward. It is a snap-on component that does not require special tools. Simply pry the old one off and press the new one firmly into place.

Q: What are the signs that this part needs to be replaced?
A: You should replace the cap if it is cracked, broken, or missing. A missing cap can allow dirt and moisture to enter the pin area, leading to corrosion and potential damage to the trim cylinder.

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.