The Honda 91351-766-801 O-Ring (1.9X27.7) is a genuine OEM sealing ring designed for BF35, BF40, BF45, and BF50 outboard motors. As an authentic Honda part, this o-ring is manufactured to the exact dimensions Honda specifies, ensuring the precise cross-section and diameter the original design requires. Verify part number 91351-766-801 against your outboard's serial number and parts diagram before ordering, as Honda supersedes sealing components at production breaks.
Key Features
- OEM Sealing Integrity — manufactured to Honda's exact 1.9 mm cross-section and 27.7 mm inside-diameter specification, maintaining the leak-free sealing performance the original assembly calls for
- Direct OEM Replacement — drops into the original groove without modification, restoring the sealed interface exactly as Honda engineered it
- Broad Outboard Fitment — listed for BF35, BF40, BF45, and BF50 Honda outboard motors; confirm against your unit's parts diagram to ensure this is the correct ring for your application
- Serial-Range Awareness — Honda updates sealing components across production runs, so cross-check your outboard's serial number against the fitment table before finalizing your order
An o-ring is a precision loop seal that sits in a machined groove and compresses between two mating surfaces to prevent fluid or pressure from escaping. In an outboard motor, o-rings appear throughout the fuel system, cooling water passages, and oil circuit — anywhere two components must form a leak-proof joint. When an o-ring hardens, cracks, or takes a compression set over time, it loses its ability to seal, allowing water ingestion, fuel leaks, or oil loss that can lead to overheating or internal damage. Replacing a worn o-ring with a correctly sized OEM part restores the sealed barrier and keeps the motor running as intended.
Part Details
| Part Number | 91351-766-801 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | O-Ring (1.9X27.7) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF35, BF45 | 1008201-9999999 |
| Outboard Motor | BF40, BF50 | 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.
