Briggs & Stratton 300e hardly running rough

jay07

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Jul 30, 2024
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Got given this mower, originally it ran but was surging and thought a simple carb clean would sort it. Cleaned the carb, now it’s barely running! Replaced fuel, filter, plug etc. getting ready to throw it off a cliff.
 

Bertrrr

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Mar 11, 2021
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Clean it again and check all the fuel supply side lines , filter ,screens , vent on tank etc.
 

jay07

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Jul 30, 2024
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Clean it again and check all the fuel supply side lines , filter ,screens , vent on tank etc.
I’ve had the carb off and cleaned it about 4 times, I’m now thinking possibly governor problem? No choke on this mower just a primer.
 

Bertrrr

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Governor only regulates the speed , it has to be running well enough for the governor to respond , if it will not run smoothly there is still a carburator / fuel problem I usually find some small debris or rust particle in the main jet when they run like this
 
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