I need more information
Can you describe the system--make/model toilet, and how it's plumbed? I'm assuming that you have a manual toilet that's plumbed to discharge into a holding tank. If it doesn't go into a tank, you can't legally use it, because it's illegal to flush a toilet directly overboard in all US and Canadian inland waters, including the Great Lakes. Or it may be self contained system. However, unless a PO has cobbled up some kind of jury-rig, I'm sure the plumbing is adequate to handle both liquid and solid waste, plus limited amounts of quick-dissolve TP...you just need to know how to operate and maintain the toilet and tank correctly. But before I can tell you how to do that, I need to know exactly what you have.Meanwhile, I think you'll find the link below useful...