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Look for a dirty/clogged air filter or fuel filter. A more likely cause would be a blockage inside the carburetor. Secondary, a bad gasket somewhere between the carb and engine block. A clogged fuel filter would allow the engine to run ok for a few minutes before surging, and a blocked air filter would cause a rich running condition.
What else can I help you with?
What causes a lawn mower engine to constantly rev up and down?
Revving up and down is usually a symptom of a dirty air filter.
What causes a lawn mower engine to rev up and down with out moving the throttle setting?
The governor spring adjustments
Why does lawn mower engine power fluctuate?
If you mean the engine will rev up and down as it is running, it has been my experience that a dirty air filter is a cause of the fluctuation.
Why does your riding lawn mower rev up and down?
A riding lawn mower may rev up and down due to several reasons, including a dirty air filter, a clogged fuel filter, or issues with the carburetor. Additionally, a malfunctioning throttle control or a problem with the ignition system can cause erratic engine behavior. It's also possible that the mower is experiencing a fuel supply issue or has a spark plug that needs replacement. Regular maintenance can help prevent these issues.
What causes a Briggs and stratton engine idle speed go up and down?
The most common cause of engine surging (rev up and down) is a dirty air filter.
What causes a 4.5 Briggs mower to rev up and down?
A Briggs & Stratton mower revving up and down can be caused by several factors, including a dirty air filter, which restricts airflow, or a clogged fuel filter affecting fuel delivery. Additionally, a malfunctioning carburetor or a sticky governor can lead to inconsistent engine speed. Check for loose or damaged spark plugs and ensure the throttle is properly adjusted as well. Regular maintenance can help prevent these issues.
Why wont your lawn mower rev up and it keeps dying?
not getting gas. clean\carb rebulid needed
What causes engine to not speed up on riding mower?
governor not moving freely or dirty carb
What causes small gas engines to rev up and down?
The govenor on the carbeurtor, When the motor is not getting enough fuel and is about to cut off, The govenor kicks in and squirts more fuel in to keep it alive.
What causes a lawn mower motor to seize up?
Usually lack of oil or somebody put something in the gas.
What causes an engine rev up and go on its own?
it might men that your gas intake lever is sticky or rusted
Why does my simplicity riding lawn mower slows down when cutting grass. The grass builds up at the discharge.?
blade needs sharpening,or belt is slipping for mower deck.
