Yamaha O-Ring 93210-25552-00

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Alternate/Superseded Part Numbers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.