RV Repair: toilet leaking when you sit down on it, porcelain toilet, hair line

Question
We have a 2002 Travel Supreme Motor home with a porcelain toilet that has developed a leak, apparently from the bowl when you sit down on it.  It does not leak at any other time and it is not clean water. I falsely accused the boy of having an accuracy problem at first.  I have inspected for a hair line crack but noting is visible.  Any ideas on how to repair?

Answer
Hi Chris
Thats a SEALAND toilet and it sounds like the base gasket has failed or the base mount is loose. Either way the toilet has to come off the floor flange, remove the plastic base cove then the four 1/2 inch nuts and washers, disconnect the water line and remove the toilet. Replace the base gasket,remount the toilet and test.
I've not know one to crack.

Thom