The lower unit on my ghost is very loud. Took it to service center today according to Lowrance since there was no water intrusion in lower unit the rotor is bad , but they discontinued the rotor because too many technicians were tearing lower unit up taking it apart so my only option now is to buy a new lower unit for $1100 so now I’m stumped on what to do $1100 to fix which part is on back order or buy a new trolling motor with warranty the motor is 4 years old