Dirt in the carb or carb out of adjustment or both.
The most common cause of engine surging (rev up and down) is a dirty air filter.
Fast idle motor is not working. This is allowing the idle to fall below the threshold of what it should be when the A/C is on.
Idle slows down to a stall when you stop or slow down when AC is running. How do I adjust idle or is something else wrong?
might be bad motor mount / or electrical short
Bad clutching? Idle adjustment
Where is the location of the idle screw on the Briggs and Stratton 6.0 engine mulcher mower?
on the carb there is a plate that moves when you throttle up and returns to a stop screw when throttled down. This stop screw is the idle adjustment, turn it in until you reach your desired idle rpm.
move your throttle cable and follow it to the carb. See how is moves?? There is a screw right there. That's the idle adjustment screw. Move it in and it speeds up. back if out and the idle will slow down
Check the idle, if its fluctuating or falling than nomal. Usually, low idle causes stalling when coming into stops. Low idle, usually is due to dirty throttle, a leak in the vac hose, or a damaged MAF or IAC motor.
idle speed motor on the throttle body.
vacumm leak problem.
Idle Air Control Motor malfunctioning.