What cyl is 1 on a mercury 2cyl 2 stroke?

On a Mercury 2-cylinder 2-stroke outboard motor, Cylinder 1 is typically the one that is positioned at the port side (left side when facing the front of the motor). This cylinder fires first in the firing order, leading to the motor's power stroke. The specific configuration can vary by model, so it's always a good idea to refer to the owner's manual for precise details.