Yamaha O-Ring 93210-25552-00
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The 93210-25552-00 is a crankcase O-ring used on compatible Yamaha V6 Four Stroke outboards and Mercury 225 HP 4-stroke applications. It seals the specified crankcase joint or passage where the parts diagram calls for this O-ring and replaces Mercury 25-887812.
Key Features
- Crankcase O-ring
- Yamaha part number: 93210-25552-00
- Mercury replacement reference: 25-887812
- Fits Yamaha V6 Four Stroke applications
- Fits Mercury 225 HP 4-stroke applications
- Used in the crankcase sealing system
- Replace during crankcase-related service or whenever the O-ring is removed
Application Compatibility
Fits select applications including:
- Mercury 225 HP 4-Stroke
- Yamaha V6 Four Stroke
Use where the engine parts diagram calls for 93210-25552-00 or Mercury 25-887812.
Serial Number Fitment Notice
Confirm fitment by model, serial number, and crankcase diagram location before ordering. Yamaha-built Mercury 4-stroke applications can share related parts, but fitment still depends on the exact engine model and production range.
When This Part Needs Replacement
Replace when servicing the crankcase area, when the sealed joint is opened, or when the existing O-ring is flattened, cut, swollen, hardened, pinched, or leaking. O-rings should not be reused once compressed or damaged.
Installation Notes
Clean the sealing groove and mating surfaces before installation. Inspect the crankcase area for corrosion, scratches, or debris that could prevent proper sealing. Install the O-ring without twisting or pinching, and follow the factory service manual for crankcase assembly procedure.
Alternate/Superseded Part Numbers
- Yamaha 93210-25552-00
- Mercury 25-887812
Parts Desk Insight
This is a crankcase-specific sealing O-ring, not a generic service O-ring. Matching the Yamaha and Mercury reference numbers helps ensure the correct size and sealing profile for Yamaha V6 Four Stroke and Mercury 225 HP 4-stroke crankcase applications.
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.