MISS HYDRO,I cannot believe you could run your boat in a bathtub!!!!! I tried tuning mine out side under a carport with a water supply to it and it took about twenty secs. of running and my ears were sreaming STOP!!!! even with earplugs it still was noticable" so how in the world did you run one indoors?" and I wonder what did your neighbors think was going on ????? Glad to see your comments back on line,yours and "SOME" others have been helpful while trying to get my boat running correct.I say SOME because not all have been.PS. I did partially break my TC31 in with just a water line to cool it and running less than half throttle and that was last spring and it still runs good today!!!