We have touched on seawater cooling and lack of...Now what about if you have a intermittent problem, or the pump won't start at all ? In boats with multiple systems running on one seawater pump there is most likely a Pump Relay to receive a signal from each system to tell the pump it needs to run...That is unless it has been bypassed and the pump runs 24/7 from the breaker ( I see this done fairly often) Lets start with the breaker in the main panel...Most are labeled A/C pump or … [Read more...]