If it is leaking water then it is also leaking carbon monoxide and other exhaust gasses. It might be the case of a simple hose clamp loosening up or it might be the hose itself is split. Once water permeates the hose and gets into the
steel coil inside it can rust out and then split. This is exactly what my hose did after 42 years. It wasn't leaking any water that I could tell last year but when I inspected a few weeks back it I found a bad spot in the bottom in one area in the aft
cabin. It's not going to get any better.
Right now I've got 12-feet of new 2-1/4" hose in the mail from Jamestown Distributors. It's under $150 shipped. It's not worth my life or the life of anyone on the
boat getting CO poisoning. Some boats have better access than others. I was able to get the whole 12-foot section out in one piece without having to disassemble anything other that open a few pull-off access
panels under the berth
cushions in the aft
cabin Thank you Hallberg-Rassy for awesome access.