I don't know.. It sounds like an accident waiting to happen. I hope it's a shallow lake, so worst case scenareo you just get wet and walk to shore. If the mast broke the metal is probably fatigued. And that may be true for all the other metal parts as well. There are so many parts that can break on these boats that would just leave you stranded.
If you do get this boat running, do stick close to shore and sail where people can help you.


good luck


Fred F (ex Hobie 18)