The Honda 91253-921-003 Water Seal (6MM) is a genuine OEM component designed for Honda outboard motors including the B75, BF100, BF15, BF25, BF30, BF5, BF50, BF75, BF8, and BF9. As a direct Honda OEM part, it meets the original engineering standards the outboard was built to, ensuring a proper seal without modification. Verify part number 91253-921-003 against your motor's serial number and model designation using the fitment table before ordering, as Honda supersedes and updates seals at production breaks.
Key Features
- Genuine OEM Sealing Integrity — sourced directly from Honda, this seal delivers the dimensional accuracy that water exclusion demands in a marine environment, where an improperly sized seal can allow water ingress into critical rotating or moving components
- 6MM Variant Identification — the (6MM) designation is the key selection criteria; confirm that this size matches your motor's requirement before ordering, particularly when multiple seal sizes appear across the Honda outboard range
- Broad Outboard Fitment — listed for Honda portable and standard outboard motors including the B75, BF5, BF8, BF9, BF15, BF25, BF30, BF50, BF75, and BF100; use the fitment table to confirm your specific motor
- Serial Number Verification Recommended — Honda updates seals at production serial breaks, so always cross-reference your motor's serial number against the compatibility table to confirm part number 91253-921-003 is correct for your unit
A water seal prevents moisture and water from migrating past a rotating or reciprocating shaft into areas of the outboard motor where water intrusion would cause damage — such as bearing surfaces, gear oil cavities, or internal mechanisms. In an outboard operating continuously in a wet marine environment, even a minor seal failure can allow water to contaminate gear oil or reach components that depend on lubrication, leading to accelerated wear or seizure. Replacing a worn or compromised water seal promptly is a straightforward step that protects the more costly internal components of the motor.
Part Details
| Part Number | 91253-921-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Water Seal (6MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF25, BF30, BF50, BF75 | All |
| Portable Outboard Motor | B75, BF5, BF8, BF9, BF15, BF100 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
