My vacuuflush has been cycling and then stayed on. Supposedly the duck bills were replaced about two years ago. I managed to get to the two on the inboard side of the pump, but the two between the pump assembly and the tank require the pump to be removed. This seems to require maintaining a one handed push up under the exhaust to get the screws off. I managed to get three of the four, but the fourth, besides being in a place that is impossible to see, is blocked by the pump motor. Anyone have any tricks?

I tried to go through the space by the generator, but I can't seem to get my body between the generator and the steps to get in that area. I've thought about trying to go through the vent where the blower ducts run, but that is on the side of the boat without a dock and seems too deep to reach that way anyway.

My suspicion is that the replaced duck bills were the two that are fairly easy to get to, and the others are going to be well overdue to be changed.