The Honda 16551-ZM0-010 Governor Arm is a genuine OEM replacement designed for GCV135, GCV160, GCV190, and GSV190 vertical shaft engines, as well as HRB216, HRB217, HRC216, HRR216, HRS216, HRT216, HRX217, and HRZ216 lawn mowers. As a direct Honda OEM component, this Governor Arm is manufactured to the exact fit and function of the original part it replaces. Honda supersedes parts at serial number breaks, so confirm your machine's serial number against the fitment table before ordering to be sure you are receiving the correct version for your unit.
Key Features
- Genuine OEM Precision — sourced directly from Honda, this Governor Arm meets the exact dimensional and mechanical tolerances required for proper governor operation in GCV and GSV vertical shaft engines
- Broad Fitment — compatible with GCV135, GCV160, GCV190, and GSV190 engines, including those fitted to HRB216, HRB217, HRC216, HRR216, HRS216, HRT216, HRX217, and HRZ216 lawn mowers
- Speed Stability — a correctly functioning Governor Arm maintains steady engine speed under changing load conditions; a worn or damaged arm causes erratic RPM, hunting, or runaway throttle response
- Serial Number Verification Recommended — Honda updates governor components at production serial breaks; always check your engine or mower serial number against the compatibility table to confirm this is the right arm for your specific unit
The governor arm is a mechanical link in the engine's centrifugal governor system. As engine load increases or decreases, the governor assembly moves the throttle plate to keep engine speed consistent — and the governor arm is the component that physically transfers that motion to the throttle linkage. When the governor arm is bent, worn at its pivot, or cracked, the governor loses its ability to make accurate corrections, and the engine will either hunt and surge under load or fail to hold a stable idle. Replacing a damaged arm with a genuine Honda part restores precise throttle response and smooth, consistent power delivery across the full operating range of the engine.
Part Details
| Part Number | 16551-ZM0-010 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Governor Arm |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Mower | HRT216 | 7132771-9999999 |
| Lawn Mower | HRB216, HRB217, HRC216, HRR216, HRS216, HRX217, HRZ216 | All |
| Vertical Shaft Engine | GCV135, GCV160, GCV190, GSV190 | 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.
