The Honda 16551-ZN4-000 Governor Arm is a genuine OEM component designed for GXV50 and GXV57 vertical shaft engines. Sourced directly from Honda, this part meets the same standards as the original installed at the factory, making it the straight swap your repair demands. Confirm your engine's serial number against the fitment table before ordering, as Honda periodically supersedes parts at production breaks — part number 16551-ZN4-000 covers specific serial ranges within these two models.
Key Features
- Genuine OEM Throttle Linkage Integrity — Honda-sourced original equipment ensures the governor arm delivers the correct geometry and travel range for accurate engine speed regulation on GXV50 and GXV57 engines.
- Direct OEM Replacement — this arm is the same part Honda installs in production, so it drops straight into the existing governor linkage without modification or adaptation to mounting points.
- Verified Fitment for GXV50 and GXV57 — designed specifically for these vertical shaft engines; check your serial number against the fitment table to confirm this is the correct arm for your production range.
- Engine Speed Stability — a worn or bent governor arm causes erratic RPM, hunting, or runaway speed under load; replacing it with a genuine part restores steady, controlled operation across all load conditions.
The governor arm is a critical link in the mechanical governor system that keeps engine speed stable as load changes. It translates the governor flyweight or cup movement into throttle plate movement, opening or closing the throttle to maintain the set RPM. When the arm bends, wears at its pivot, or breaks, the governor loses its ability to regulate speed — the engine may surge, hunt, or rev beyond its safe operating range, making prompt replacement essential for safe, consistent performance.
Part Details
| Part Number | 16551-ZN4-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Governor Arm |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GXV50, GXV57 | 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.
