Trim Cylinder Ram Cap – Fits MerCruiser Alpha One Gen II (Replaces 19-815951, 8M0214953)
Trim Cylinder Ram Cap – Fits MerCruiser Alpha One Gen II (Replaces 19-815951, 8M0214953) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Trim Cylinder Ram Cap – Fits MerCruiser Alpha One Gen II (Replaces ...
Product Details
This high-quality Trim Cylinder Ram Cap is an aftermarket replacement designed to fit MerCruiser Alpha One Generation II stern drives from 1991 and newer, specifically models with serial numbers OD469859 and up.
It serves as a direct interchange for Mercury Marine parts 19-815951 and 8M0214953, as well as Sierra 18-2466-9, GLM 26490, and Mallory 9-77201.
- Features a simple snap-on/press-fit design for straightforward installation.
- Constructed from durable, high-temperature resistant plastic to withstand the marine environment.
- Note: Each trim cylinder requires two end caps.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury Marine | 19-815951 | 8M0214953 |
| Sierra | 18-2466-9 | |
| GLM | 26490 | |
| Mallory | 9-77201 |
Engine & Model Compatibility
Confirm your engine model and serial number range in the table below to ensure accurate fitment.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha One Gen II | 1991–1995 | 19-815951 | Serial Numbers: OD469859 to 0F679999 |
| MerCruiser | Alpha One Gen II | 1996–1997 | 19-815951 | Serial Numbers: 0F680000 to 0K999999 |
| MerCruiser | Alpha One Gen II | 1998 and up | 19-815951/8M0214953 | Serial Numbers: 0L100040 and up |
Technical Specs
- Product Type
- Trim Cylinder Ram End Cap
- Installation
- Snap-on/Press-fit
- Housing Material
- High-temperature resistant plastic
- Housing Color
- Black
- Fitting Type
- Anchor pin cap
- Thread Size
- N/A (snap-on design)
- Quantity per Package
- 1 cap (some retailers sell in sets of 2 or 4)
What’s in the Box
- 1 x Trim Cylinder Ram End Cap (Replaces 19-815951/8M0214953)
Installation Notes
- Turn the engine off and secure the stern drive in a raised position using a support block.
- Carefully pry off the old or damaged end cap from the trim cylinder ram anchor pin.
- Clean the anchor pin and the surrounding area to remove any debris or corrosion.
- Align the new end cap over the pin.
- Apply firm, even pressure to snap the cap securely into place. You should hear or feel a click.
- Tug gently on the cap to confirm it is fully seated and will not come loose.
Troubleshooting & FAQ
How do I confirm this fits my specific MerCruiser drive?
This cap fits MerCruiser Alpha One Gen II drives from 1991 onward. The most reliable way to confirm fitment is by checking your drive’s serial number against the ranges listed in the compatibility table.
What are the signs of a failing end cap?
Common signs include visible cracks, discoloration, or brittleness in the plastic. You might also notice the cap is loose, rattling, or has fallen off completely, exposing the anchor pin.
How many caps do I need to buy?
Each trim cylinder requires two caps (one for each end of the anchor pin). A standard Alpha One drive has two trim cylinders, so you would need four caps for a complete replacement. This package contains one cap.
Are any special tools needed for installation?
No special tools are required. The snap-on design allows for press-fit installation. A flat-head screwdriver may be useful for carefully prying off the old cap.
Why did the original part get superseded?
OEM manufacturers often supersede part numbers due to minor changes in material, manufacturing process, or inventory consolidation. Part 8M0214953 is the current direct replacement for 19-815951, with identical form, fit, and function.
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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