The Honda 14482-ZG8-000 Rocker Arm Collar is a genuine OEM replacement designed for GX640 horizontal shaft engines, H4518 lawn tractors, and H5518 multi-purpose tractors. As a Honda OEM component, this collar is manufactured to the exact tolerances required for correct valvetrain geometry and consistent rocker arm operation. Confirm fitment by checking your unit's serial number against the compatibility table before ordering, as Honda supersedes parts at serial breaks.
Key Features
- Genuine OEM Valvetrain Precision — manufactured by Honda to maintain the exact rocker arm geometry that keeps valve timing accurate across the GX640's OHV valvetrain
- Direct OEM Replacement — this part installs in place of the original with no modification, preserving the correct rocker arm pivot relationship
- Broad Fitment Coverage — fits GX640 horizontal shaft engines as well as H4518 lawn tractors and H5518 multi-purpose tractors; use part number 14482-ZG8-000 to confirm you have the right collar for your machine
- Serial Number Verification Advised — Honda updates part supersessions at specific serial breaks, so cross-check your machine's serial number against the fitment table to ensure this collar is correct for your unit
- Valvetrain Integrity — a worn or damaged collar allows the rocker arm to shift laterally, leading to inconsistent valve lift, rough running, and accelerated wear on the rocker arm and valve stem
The rocker arm collar is a precision spacer within the OHV valvetrain that locates and retains the rocker arm in its correct lateral position on the rocker shaft. By keeping the rocker arm properly aligned, it ensures the arm transfers camshaft motion to the valve stem cleanly and consistently with each combustion cycle. When the collar is worn or missing, the rocker arm can shift out of position, causing erratic valve actuation, increased wear on surrounding valvetrain components, and a noticeable drop in engine performance.
Part Details
| Part Number | 14482-ZG8-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Rocker Arm Collar |
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.
