hi i am looking at a few 60+ sport fish that have mtu 16v2000 motors all under 2000 hours. I have searched around and i can't find a lot of comments with regards to the quality of the motor. how many hours do they last at the 1800hp rating? Are they reliable motors? Any design flaws? are part substantially more expensive then that of Cats? How much does it cost for a rebuild on these? Any other comments regarding these engines? Any input you have would be great. thanks.