The Honda 91212-Z0H-003 Oil Seal (10X20X5) is a genuine OEM component designed for the FG110 tiller, GX25 and GX35 horizontal shaft engines, HHT25 trimmer, and WX10 water pump. As a direct Honda OEM part, this oil seal is manufactured to the exact dimensions and material tolerances Honda specifies for these applications. Verify your unit's serial number against the fitment table to confirm this is the correct seal for your machine — Honda updates part numbers at serial breaks, and matching correctly the first time keeps your repair on track.
Key Features
- Genuine OEM Sealing Integrity — manufactured to Honda's exact 10x20x5 mm specification, ensuring the sealing lip profile and dimensional fit are correct for the application rather than approximate
- Direct OEM Replacement — installs in place of the original without modification; the 10x20x5 mm sizing is a critical match, so confirm this designation against your parts diagram before ordering
- Broad Fitment Across Honda Equipment — listed for the FG110 tiller, GX25 and GX35 horizontal shaft engines, HHT25 trimmer, and WX10 water pump, including models across multiple serial ranges
- Leak Prevention — a functioning oil seal keeps lubricant where it belongs and blocks contamination from entering; a worn or hardened seal leads to oil loss, internal debris ingestion, and accelerated wear of rotating components
An oil seal is a precision ring that closes the gap around a rotating shaft where it exits a housing, preventing oil or grease from escaping and keeping dirt, water, and debris out. In small engines and power equipment, these seals are fitted at crankshaft exits and other rotating interfaces where maintaining a clean, pressurized oil boundary is essential to protecting bearings and internal components. When an oil seal fails — through cracking, lip wear, or hardening from heat cycles — the resulting leak can quickly lead to oil starvation, overheating, and serious internal damage if left unaddressed.
Part Details
| Part Number | 91212-Z0H-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Oil Seal (10X20X5) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX25, GX35 | All |
| Tiller | FG110 | All |
| Trimmer | HHT25 | All |
| Water Pump | WX10 | 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.
