If there is a lien(sp?) on the boat, arrange to pay for the boat at the place that has the lien on the boat(usually the persons bank). Make the check out to the owner, and the bank that holds the lien.. the bank will keep what portion is owed to them, and give the boat owners what is left.. and issue you the lien card at the time its paid off.
The title will do you nothing by itself if there is a lean against it.. you must have the lien card along with the title to transfer it into your own name.
This is the only way to buy anything with a lean against it. We bought a car from a guy with a lean against it, and he failed to pay off the lean when we purchased it. The title was no more than a peice of paper without the lean, and the previous owners still have legal interest in the item until that lein is paid off… trust me, you dont want to go down that road. Make the check/money order out to the lean card holder and boat owner. They will explain to you at the bank how to do it properly and you will have no problems.