The officer must first sell the furniture or appendages of the boat or raft, if by so doing the officer can satisfy the demand. If the officer sells the boat or raft, the officer must do so to the bidder who will advance the amount required to satisfy the execution for lowest fractional share thereof, unless the person defending desires a different and equally convenient mode of sale. The officer making the sale shall execute a bill of sale to the purchaser for the interest sold.
Iowa Code § 667.9