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Governor spring and linkage...

Externet
in Engineering

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Small engines like Briggs Stratton may have a governing linkage for steady rpm on certain applications.

Seen several implementation ways, but my mower has a weak spring paralleled to the rod, both attach to the same points.  How do they work?

Makes not much sense seeing such configuration, but there has to be a detail/reason am missing.  Is it related to avoid speed  'hunting'  or steadyness ?

image.png.395ec0bbc1263fb52c0e31353a8d5171.png

[The choke has nothing to do with the subject]

image.png.8ba2f42dda67dda3fc31a7fbd1a81ed6.png

 

The rod often runs inside spring.  The anchoring is slightly different here at the right side lever, attaching to apart holes, which may show more logic :

image.thumb.png.c7798f8be2cfffe5b2c6fd56754f33ab.png

-Images borrowed from the web-

Edited by Externet

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