First question it is in the water right? It needs to be to operate. It takes in sea water to flush and fill.
Secondly if yes then you will need to take the boat out of the water and check the port on the bottom for the inlet. Mine had barnacles alittle in the grate and was preventing it from getting a good inflow. cleaned it out and all good.
My 06 342 has a separate raw water pump to bring water to the toilet. Would not hold a prime. I checked filters and lines to make sure all was tight. Then I replaced the pump and it now has no problem holding a prime
not sure if 06 is the same as 03 but the seacock on my 03 is in the aft cabin. lift the bed cushion and there will be a white plastic hatch with hole in center. Lift that up and you will see the shower pump sump in there as well as the seacocks.
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Secondly if yes then you will need to take the boat out of the water and check the port on the bottom for the inlet. Mine had barnacles alittle in the grate and was preventing it from getting a good inflow. cleaned it out and all good.
Boat Name: King Kong
"Boat + Water = Fun"