The Honda 91203-Z6L-003 Oil Seal (10X16X5) is a genuine OEM component designed for GX630, GX660, and GX690 horizontal shaft engines, GXV630, GXV660, and GXV690 vertical shaft engines, and EB10000 generators. As a direct Honda OEM part, this oil seal meets the exact specifications Honda established for these platforms, ensuring a proper fit without guesswork. Confirm fitment against your machine's serial number before ordering, as Honda supersedes parts at serial breaks and the compatibility table lists the applicable ranges for each model.
Key Features
- Genuine OEM Sealing Integrity — sourced directly from Honda, this seal is manufactured to the exact dimensional tolerances required to prevent oil leakage on high-displacement GX and GXV engines and EB10000 generators
- Direct OEM Replacement — replaces the original seal on GX630, GX660, GX690, GXV630, GXV660, and GXV690 engines as well as the EB10000 generator with no modification to the housing or shaft
- Broad Honda Platform Coverage — a single part number covers both horizontal and vertical shaft configurations across Honda's large-displacement engine family, including the EB10000 generator; verify your model and serial number against the fitment table to confirm the correct application
- Serial-Range Verification Recommended — Honda updates OEM components at defined serial breaks, so checking your engine's serial number against the compatibility table ensures you receive the right supersession for your unit
- Prevents Oil Loss at the Source — a degraded or worn shaft seal allows oil to escape the crankcase or gearcase, leading to insufficient lubrication and potential engine damage; replacing this seal restores proper oil retention and keeps the engine running within its designed oil-level parameters
An oil seal is a precision lip seal that closes the gap between a rotating shaft and its surrounding housing, preventing engine oil from escaping while keeping contaminants out. On Honda's large-displacement engines and generators, these seals are fitted at points where a spinning shaft exits the crankcase, and the interference fit between the seal lip and the shaft surface is what maintains the barrier. When the seal lip hardens, cracks, or wears, oil begins to seep past it — a condition that causes oil consumption, external leakage, and, if left unaddressed, low-oil damage to internal components. Replacing a failed oil seal with the correct OEM part restores the original sealing surface and stops the leak at its source.
Part Details
| Part Number | 91203-Z6L-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Oil Seal (10X16X5) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB10000 | All |
| Horizontal Shaft Engine | GX630, GX660, GX690 | All |
| Vertical Shaft Engine | GXV630, GXV660, GXV690 | 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.
