The Honda 91318-PA9-003 O-Ring (23.5X2.1) is a genuine OEM sealing ring designed for E2500 and ES3500 generators and G65, G80, and GS65 horizontal shaft engines. As a Honda OEM component, this O-ring is manufactured to the exact dimensions and material specification required for a proper, leak-free seal. Verify your unit's serial number against the fitment table to confirm that part number 91318-PA9-003 is correct for your specific machine.
Key Features
- OEM Sealing Integrity — manufactured to Honda's exact dimensional specification, ensuring the 23.5 x 2.1 mm cross-section seats correctly and maintains a consistent, leak-free seal
- Direct OEM Replacement — drops in as a like-for-like swap with no trimming or reshaping required; the correct size is critical with O-rings, so confirm the 23.5X2.1 dimension matches your application before installing
- Broad Fitment — listed for E2500 and ES3500 generators and G65, G80, and GS65 horizontal shaft engines; check your serial number against the fitment table to confirm the correct part for your unit
- Seal Failure Prevention — a worn or distorted O-ring allows fluid or air to bypass the sealing surface, leading to leaks and loss of pressure; replacing it with the correct OEM part restores the seal and protects surrounding components
An O-ring is a precisely sized loop of resilient material that sits in a machined groove and compresses against mating surfaces to block the passage of fluids or gases. When the O-ring is the correct size and material grade for the application, it maintains a reliable seal across a wide range of operating conditions. As this component ages, it can harden, crack, or deform, breaking the seal and causing leaks that can affect performance or lead to damage in the equipment it serves.
Part Details
| Part Number | 91318-PA9-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | O-Ring (23.5X2.1) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | E2500, ES3500 | All |
| Horizontal Shaft Engine | G65, G80, GS65 | 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.
