Mercury MerCruiser Alpha One Gen II Trim Cylinder Anchor Pin - 17-815953A01
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Mercury MerCruiser Quicksilver 17-815953A01 is a genuine Mercury Marine OEM anchor pin assembly used on select MerCruiser sterndrive trim-cylinder mounting locations. This pin provides the pivot/anchor point that secures the hydraulic trim cylinders to the drive or transom assembly, allowing the sterndrive to trim and tilt while keeping the trim rams properly aligned.
This anchor pin is commonly associated with Alpha One Generation II sterndrive and transom assemblies where the factory parts diagram calls for 17-815953A01 / 815953A01.
Key Features
- Genuine Mercury Marine OEM anchor pin assembly.
- Mercury/MerCruiser part number: 17-815953A01.
- Alternate formatting: 815953A01, 17-815953, and 815953.
- Used on select MerCruiser hydraulic trim cylinder mounting points.
- Provides the pivot/anchor rod for trim ram attachment.
- Common Alpha One Gen II service component where specified.
- UPC reference: 745061655157.
- Listed overall length: 10.73 in.
- Listed outside diameter: 0.625 in. / 5/8 in.
- Cross-references common Sierra and GLM aftermarket replacement references.
Drive Compatibility
Common application context includes select MerCruiser Alpha One Generation II sterndrive and transom assemblies where the Mercury/MerCruiser parts diagram calls for this anchor pin, including:
- Select Alpha One Gen II trim cylinder installations.
- Select 1991 and newer Alpha Gen II drive/transom assemblies where specified.
- Front or rear trim cylinder anchor locations where the diagram calls for 17-815953A01.
- Sterndrive service jobs involving worn, seized, bent, corroded, or missing trim ram anchor hardware.
Use this pin only where the Mercury/MerCruiser parts diagram specifically calls for 17-815953A01 / 815953A01.
Serial Number Fitment Notice
Confirm fitment by sterndrive serial number, transom assembly serial number, trim cylinder style, mounting location, and factory parts diagram before ordering. Alpha One Gen II trim hardware can vary by production range, trim cylinder design, and mounting position. Do not select this pin by drive generation alone if the existing hardware, clips, bushings, or trim ram style has been changed.
When This Part Needs Replacement
Replace the anchor pin if it is bent, seized, pitted, worn, grooved, corroded, mushroomed at the ends, or difficult to remove during trim cylinder service. It should also be replaced if the trim cylinder has excessive side play, loose mounting hardware, damaged retaining clips, worn bushings, or visible misalignment at the trim ram pivot point.
Installation Notes
Inspect the trim cylinders, bushings, washers, E-clips/retainers, mounting bores, and surrounding drive or transom bracket before installing the new pin. Many listings for this part may supply the stainless pin only, so confirm whether the related bushings, washers, clips, or retainers are included or need to be ordered separately.
Clean corrosion from the mounting bores before installation and apply the marine grease specified by the service manual where appropriate. Do not force the pin through misaligned trim cylinder eyes, as that can damage the cylinder bushings or mounting brackets. After installation, cycle the trim system and confirm smooth movement with no binding.
Alternate/Superseded Part Numbers
- 17-815953A01 — Mercury/MerCruiser OEM part number
- 815953A01 — Mercury base/manufacturer formatting
- 17-815953 — shortened catalog reference
- 815953 — base reference
- Sierra 18-2395 — aftermarket cross-reference; verify by drive serial number and diagram
- GLM 21424 — aftermarket cross-reference; verify by drive serial number and diagram
Parts Desk Insight
Trim cylinder anchor pins are structural hardware, not just small fasteners. A worn or corroded pin can create trim ram movement, uneven load on the cylinder eyes, and noisy or loose drive operation. When replacing the pin, inspect the retaining clips and bushings at the same time so the new pin is supported correctly.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.