If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT __________.

Correct Answer: Option A — the circuit breaker

A circuit breaker issue would prevent the pump motor from starting entirely. If the pump is running and developing vacuum, the electrical system is functional. The problem lies in the hydraulic path, such as air leaks, clogged strainers, or internal bypasses like a leaking relief valve.