I'm thinking about buying a Bullet with a Mercury Pro XS and know I will need to change the lower unit to a Sportmaster and I was concerned that it would void the warranty of the motor. I ask this because I added a nose cone to one several years back and the lower unit went out and the dealer that I bought the boat and motor from replaced the lower unit once but said he couldn't do it again due to he had to replace it out of pocket since Mercury would not replace due to modifications. Does the Sportmaster have warranty? Thanks in advance for any input.