The Honda 91301-426-010 O-Ring (4.9X2.5) is a genuine OEM replacement designed for G300, G65, and G80 horizontal shaft engines. As a factory-sourced component, this O-ring is manufactured to Honda's original dimensions, ensuring the same profile and fit as the part it replaces. Honda supersedes parts at serial breaks, so verify your engine's serial number against the fitment table before ordering to confirm this is the correct listing for your unit.
Key Features
- Genuine OEM Sealing Integrity — manufactured to Honda's original 4.9 x 2.5 mm specification, so the cross-section and diameter match the seating groove exactly as intended for these G-series engines.
- Direct OEM Replacement — sourced directly from Honda, this O-ring installs without modification as a like-for-like swap for the original part.
- G-Series Fitment — listed for G300, G65, and G80 horizontal shaft engines; confirm your serial number against the compatibility table to ensure this variant matches your specific unit.
- Restore Fluid Sealing — a worn or hardened O-ring allows fluid or air to bypass its seating groove, leading to leaks or pressure loss; replacing it with a correctly sized OEM part restores the seal.
An O-ring is a loop-shaped seal that sits in a machined groove and is compressed between two mating surfaces or components to prevent the passage of fluids or gases. In Honda's G-series horizontal shaft engines, O-rings are used throughout the engine wherever a reliable, pressure-resistant seal is needed between assembled parts. When an O-ring ages, hardens, or takes a set, it loses the ability to conform to its seating surfaces and will allow leaks to develop — making timely replacement essential to keeping the engine running cleanly and efficiently.
Part Details
| Part Number | 91301-426-010 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | O-Ring (4.9X2.5) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | G300 | 1000001-1177540 |
| Horizontal Shaft Engine | G80 | 1016984-9999999 |
| Horizontal Shaft Engine | G65 | 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.
