john deere 260 riding mower, how to fix engine surging

[4josephwatts]

Can anyone help with an answer to the title subject? It is not the air filter. need explanation on how to adjust air fuel mix. thx

 

[bertsmobile1]

It is not an adjustment.
It is not enough fuel for the volume of air.
You need to clean the carb fuel passages, replace the fuel filter and check for air leaks between the carb & engine.