We have same engine, and same problem from time to time. Tried to trace the wiring from panel to solenoid. Never found any fault, but works again for a year, or a month, after some wiggling of wiring,

What a brilliant tip! I have the same problem with a collapsed riser pipe in the forward holding tank, and will plan for glassing in a new glassfiber or epoxy pipe. Due to still lockdown wher my boat

Thanks :-) best regards Robert

Hi. I did this job last summer. On our boat there is a metal backing plate in the basemould. I just sealed the old holes and drilled new ones. These I threaded and just bolted the new toilet down. Bes