Why does a hp Chrysler outboard pump water idling but not in gear?

If a high-performance Chrysler outboard pumps water while idling but not when in gear, it may indicate a blockage in the water intake or a malfunctioning impeller. When the engine is in gear, the increased load may cause a drop in water flow if the pump isn't functioning effectively under pressure. Additionally, it could be a sign of a failing water pump or a clogged cooling system. Regular maintenance and inspection of the water intake and pump components are essential to diagnose and resolve the issue.