Idle Adjustment 20 hp Mercury 4-Stroke
How do I change the idle setting on a 20 hp Mercury 4-stroke? The engine runs too slowly when in neutral and stalls every now and then. The engine also shutters as its ticking over.
Can I make small alterations to the idle speed screw to achieve smooth idling? Are there instructions online that can show me step-by-step how to adjust the idle on a 2009 Mercury four-stroke 20hp? I am not even sure where the idle screw is located.
My motor looks like this…