The Honda 14775-ZG8-000 Valve Spring Seat is a genuine OEM component designed for GX640 horizontal shaft engines, H4518 lawn tractors, and H5518 multi-purpose tractors. As a direct OEM replacement, this part is manufactured to the same specification as the original, ensuring correct seating geometry and spring retention at the valve stem. Confirm your machine's serial number against the fitment table before ordering, as Honda supersedes valve train components at serial breaks across this model range.
Key Features
- Precise Spring Retention — holds the valve spring at the correct height and angle, maintaining consistent valve timing and proper combustion sealing across all operating conditions
- Genuine OEM Construction — sourced directly from Honda, this seat matches the original geometry for a drop-in fit with no rework or shimming at the valve stem
- Broad Model Coverage — fits GX640 horizontal shaft engines, H4518 lawn tractors, and H5518 multi-purpose tractors; always cross-reference part number 14775-ZG8-000 against your serial number before installation
- Valve Train Integrity — a worn or damaged seat allows the spring to seat unevenly, leading to valve float, compression loss, and rough running; replacing it restores proper valve operation
The valve spring seat is a small but critical component in the valvetrain. It sits at the base of the valve spring, providing a flat, stable bearing surface that keeps the spring correctly loaded against the valve. When the seat wears or deforms, the spring can shift off-axis, causing inconsistent valve lift, reduced compression, and accelerated wear on the valve stem and guide. Replacing a failed seat restores proper spring tension and valve movement, bringing combustion efficiency back to normal.
Part Details
| Part Number | 14775-ZG8-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Valve Spring Seat |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX640 | All |
| Lawn Tractor | H4518 | All |
| Multi-Purpose Tractor | H5518 | 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.
