Mercury Washer 35777
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You have 30 days to request a return. All sale items are final sale.
Mercury 35777 is a genuine OEM washer listed in Mercury catalog format as 12-35777. Dealer listings identify it by size as .5156 x 1.375 x .125 and describe it as an aluminum washer used in selected Mercury MerCruiser applications.
Key Features
- Genuine Mercury Marine / Quicksilver OEM hardware
- Part number 35777
- Mercury shorthand listing: 12-35777
- Washer size: .5156 x 1.375 x .125
- Commonly listed as aluminum.
Engine Compatibility
This washer is associated with selected MerCruiser Alpha One and Bravo sterndrive applications in dealer listings. Because washers are often used in very specific stack-up locations, fitment should still be confirmed by the exact model, serial number, and parts diagram before ordering.
Serial Number Fitment Notice
Please confirm compatibility by your exact Mercury MerCruiser serial number before purchase. Small OEM washers can look interchangeable while still differing in diameter and thickness.
When This Part Needs Replacement
Replace this washer when the original is missing, bent, worn, corroded, or no longer providing the correct support or spacing in the assembly. Because this is a size-specific OEM washer, matching the exact part number is the safest way to maintain proper fit. This is a practical service inference based on its exact dimensional listing and hardware role.
Installation Notes
Install only the exact washer specified for the assembly being serviced. On marine hardware, thickness and diameter matter just as much as the bolt or shaft it supports.
Alternate / Superseded Part Numbers
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12-35777
No confirmed superseded Mercury part number was established from the sources reviewed.
Parts Desk Insight
A washer like this is simple, but it still does an important job in maintaining clamp load and stack height. Using the exact OEM washer is the smart move when refreshing older MerCruiser hardware assemblies.
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.