What is the spark plug gap for 90 hp 2 cycle mercury outboard?

The spark plug gap for a 90 hp 2-cycle Mercury outboard typically ranges from 0.030 to 0.040 inches (0.76 to 1.02 mm). However, it's always best to consult the specific owner's manual or service manual for your model to ensure the correct gap, as it can vary slightly depending on the year and specific model.