hey guys last year before i put my boat away for the winter i noticed that there was a little bit of black oily stuff dripping out of behind the prop the motor is an 100 hp 1971 anniversary edition, should i be worried about this or is it just some burned gas dripping out of the muffler or is it water mixing with the soot on the muffler output???? can you tell me what this is and what i should do about it????
