Honda 91211-Z3E-003 Oil Seal (12X24X5)

The Honda 91211-Z3E-003 Oil Seal (12X24X5) is a genuine OEM replacement designed for the FG110 tiller, GX25 horizontal shaft engine, HHT25, UMC425, and UMC435 trimmers, and the WX10 water pump. As a direct Honda OEM component, this oil seal is manufactured to the exact dimensions and material specifications Honda requires for proper sealing across this range of equipment. Always verify your machine's serial number against the fitment table before ordering, as Honda supersedes parts at specific serial breaks. If you are unsure whether this seal is the correct one for your unit, confirm part number 91211-Z3E-003 against your model's parts diagram.

Key Features

• Correct Dimensional Specification — the 12×24×5 mm sizing is the precise match Honda specifies for these applications; an incorrect seal dimension will not seat properly or retain oil effectively
• Genuine OEM Sealing Integrity — manufactured to Honda's own standards for lip geometry and sealing pressure, ensuring oil is retained at rotating shaft interfaces where an aftermarket seal may allow weepage or premature failure
• Broad Cross-Equipment Fitment — listed for the FG110 tiller, GX25 engine, HHT25, UMC425, and UMC435 trimmers, and the WX10 water pump; confirm your serial number against the fitment table to ensure this is the correct supersession for your serial range
• Genuine Honda Part — sourced directly from Honda, this component carries the OEM part number 91211-Z3E-003 and is the authoritative replacement for worn or leaking seals on these models

An oil seal prevents lubricating oil from escaping past a rotating shaft where it exits a housing or case. In small engines, pumps, and handheld power equipment, these seals are subject to constant rotation, heat cycling, and exposure to fuel and oil — all of which degrade the sealing lip over time. When an oil seal fails or wears out, oil migrates past the shaft, leading to loss of lubrication, external leaks, and potential seizure or damage to internal components. Replacing a worn seal with a correctly sized genuine OEM unit restores a leak-free barrier and protects the equipment from the consequences of lubricant loss.

Part Details

Compatibility & Fitment

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.