Description
Overview:
The Governor Spring for Villiers MK10, MK15 and MK20 engines is a small but critical component that controls engine speed via the governor mechanism. As a Genuine Villiers part (OEM No. EM222), it is designed to deliver the correct tension and response for stable RPM across a range of operating loads. Manufactured from durable spring steel with hooked ends for secure location, it helps prevent hunting, over‐revving and stalling, supporting smooth throttle control and consistent performance. Well suited to classic and vintage Villiers stationary engines used on grounds care and light construction equipment, this unused old‐stock spring maintains period‐correct fit and function. It may display minor storage tarnish without affecting performance. Ideal for keeping MK10 or MK15 engines running reliably after rebuilds or routine maintenance.
Key Features:
- Genuine Villiers part for assured compatibility and correct governor action (OEM EM222)
- Durable spring steel construction for long service life under vibration and heat
- Direct replacement profile with formed hooks to fit existing governor linkage points
- Helps maintain steady RPM under varying load, reducing surging and hunting
- Supports easier starting and smoother throttle response
- Suitable for vintage restorations while preserving authenticity
- Unused old stock; cosmetic aging may be present but does not affect function
- Compact, lightweight and simple to install with basic hand tools
- Engineered tension characteristics matched to Villiers MK‐series requirements
- Reliable choice for preventative maintenance and performance recovery
Typical Applications:
Used in Villiers single‐cylinder engines to regulate speed on equipment such as lawn mowers, rotavators, pumps, generators, lighting plants, small mixers and compactors. Ideal when rebuilding classic engines, correcting unstable idle or load speed, or replacing a weakened, stretched or missing governor spring.
Also known as:
Governor tension spring, speed governor spring, RPM control spring, throttle governor spring for Villiers engines, MK‐series governor spring, Villiers EM222 spring.
Fits Models:
C12, C15, C25, MK10, MK12, MK12/1, MK121, MK15, MK20, MK25
Alternate Part Numbers:
EM222
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