The Honda 91303-259-000 O-Ring (11X2.0) is a genuine OEM replacement designed for EM500, EM600, and EX800 generators. As a direct Honda OEM component, this o-ring is manufactured to the exact dimensions and material specifications required for a proper seal. This part fits EM500, EM600, and EX800 generators — verify your unit's serial number against the fitment table to confirm the correct application before ordering.
Key Features
- Genuine Honda OEM Seal — sourced directly from Honda, this o-ring meets the exact dimensional and material requirements needed to maintain a leak-free seal in your generator.
- Exact-Match Dimensions — the 11X2.0 size designation identifies this specific variant; confirm it matches the o-ring in your unit before installation.
- Confirmed Fitment — listed for EM500, EM600, and EX800 generators; check your serial number against the compatibility table to ensure this is the right o-ring for your machine.
- Leak Prevention — a correctly seated o-ring maintains internal fluid or air containment; a cracked, flattened, or missing o-ring leads to leaks that can affect generator performance and cause fluid loss.
An o-ring is a precision-formed loop of elastomeric material that compresses between two mating surfaces to create a fluid- or air-tight seal. In a Honda generator, o-rings are used at various sealing points — including fuel system fittings and oil passages — to prevent leaks that would otherwise allow fluids to escape or contaminants to enter. When an o-ring ages, hardens, or takes a set, it loses its ability to maintain compression against mating surfaces, resulting in seepage or leaks that require immediate attention to keep the generator running properly.
Part Details
| Part Number | 91303-259-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | O-Ring (11X2.0) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM500, EM600, EX800 | 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.
