hi all just brought my motor to a dealer to be checked thought the carb needed rebuilding. was running up down river about 4 times ran great but all of a sudden it bogged down and stalled couldnt get started again . dealler told me i would be waisting my time with carb kit. said he took compresion test and told me that bottom compresion was at 180 top end was at 30 says motor is shot . welll is that so