By 
Question: Help me Alex: My engine stalls in neutral, at idle, only.
For example your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. This valve controls idle speed by regulating air intake, and when it gets stuck in the wrong position, it can shut you down cold.
