spongehead wrote:
I have an old Briggs and Stratton 3.5hp push behind lawnmower and the
idle revvs up and down constantly. Never idles normal. The spring
on
the shaft idle looks good. Any help on what this might be would be
greatly appreciated.


Spongehead--

Recommend cleaning the air intake sponge first then let us know if the
problem still exists. I assume you have the 99 dollar Walmart mower
with no variable throttle.

Tut