[Medicone]

I had a similar issue on my 35 Open a few years ago.  The old bilge pump in the sump box was full of sand/debris.  To change it, it was necessary to remove the cabin steps, which was a pain to reinstall (several posts on the forum about that including one with plans to add hydraulic rams to the steps - forget who authored it).

Once you get to the sump box, remove the top, vacuum out all the debris, remove the bilge pump and flush with fresh water, then vacuum again.  Again, it's a pain to get to, so I just changed out the bilge pump with a higher flow Rule while I was down there.  Has worked great for years and a cheap fix.

Best of luck,

-M1