07-26-2021, 06:11 AM
I have a 2003 38 Open w/2 Flow Jet pumps as well. Also have 2 breakers, one for each pump. I always use both pumps, although one is enough. The purpose of the 2 pump system is to minimize water pulsing at the faucet or at leas that is what I was told when I purchased the boat... From what I understand from your posting I would take a look at the filter just before the pumps to ensure you don't have an air leak there. The filter cover screws off and there is a rubber gasket that gave me trouble when removed/replaced when cleaning the metal filter... Look at the filer to ensure its full of water when using the system. Mine was allowing air to get in preventing a good suction from the tank... Once I reseated the gasket the pumps worked correctly and pressure remained good. Another guess is the pump diaphragms are worn out and can be replaced by purchasing a Flowjet repair/rebuild kit.. Kit wasn't expensive and I actually have one on the boat should I need it...M2C
