Which component in the power trim and tilt system protects against impact damage from underwater obstructions?

The shock valve plays a crucial role in the power trim and tilt system by providing protection against impact damage from underwater obstructions. When an outboard motor encounters an obstruction, the shock valve allows for a controlled amount of movement in the trim system, absorbing the energy from the impact. This helps to prevent damage to the components of the trim system and the engine by allowing the motor to pivot instead of forcing everything to remain static and potentially breaking. By effectively managing the pressure and movement during such impacts, the shock valve ensures the longevity and reliability of the power trim and tilt system.