Description
Overview:
The Governor Spring for Honda GXH50 (GCAL) engines is a small but critical metal spring that links into the governor mechanism to control engine speed under changing loads. Identified by MPN 16561 ZM7 D10, it is designed for Honda mini 4‐stroke engines commonly found on compact construction and garden machines. By maintaining a stable RPM, it prevents surging and hunting, supports smooth throttle response, and helps protect the engine from overspeed. This direct-replacement spring is suitable for routine servicing or restoring correct governor operation on GXH50 and GXH50U engines, helping the machine run consistently whether idling or working hard. A correct, well-tensioned governor spring is essential for dependable performance and fuel efficiency across a wide range of light industrial and horticultural equipment.
Key Features:
- Regulates engine speed to keep RPM stable under varying loads
- Direct replacement part to restore correct governor function on GXH50-series engines
- Durable metal spring construction for long service life
- Correct specification for the GXH50 governor linkage and travel
- Helps prevent hunting, surging, and overspeed conditions
- Supports smooth transitions from idle to high throttle
- Suitable for frequent-use machines in construction and garden environments
- Compact form factor fits within the original engine envelope
- Clear identification via MPN 16561 ZM7 D10 for easy parts matching
- Straightforward to fit with basic hand tools during routine maintenance
Typical Applications:
Used on Honda GXH50-powered equipment such as small water pumps, plate compactors, mini concrete tools, augers, lawn aerators, scarifiers, small tillers, and other light plant. Ideal when addressing irregular idle, erratic top-end speed, or poor load response caused by a fatigued or stretched governor spring.
Also known as:
Throttle governor spring, engine speed control spring, governor tension spring, governor linkage spring, speed stabiliser spring, control spring.
Fits Models:
GXH50, GXH50U, GXH50UT
Alternate Part Numbers:
16561-ZM7-D10, 16561ZM7D10
Product Specifications
| L&S Part No. | 16561 ZM7 D10 |
|---|---|
| Manufacturer | Honda |
| OEM No. | 16561ZM7D10 |
| Unit of Sale | 1 |
| Applications | GXH50, GXH50U, GXH50UT |
| Machine Type | Engines |
| Fits Brands | Honda |
| Fits Models | GXH50 (GCAL) | GXH50UT (GCBYT) | GXH50U (GCAFK) (Mixer Spec) |

