I have a Mercury V6 150hp, black max serial no is 06443480, 1983-1984 (not sure of the year). I took the boat out for the first time after running at wot for 10 or 15 minutes, the motor slowly lost power while still running at wot, it slowed to a trolling speed. I have replaced two yellow wires coming from stator going ot rectifier, they were corroded and naked, touching each other and laying on the power pack. I have replaced coil wire going to no. 4 cyclinder, it was the same way the other two wires were, naked and corroded. I have checked spark going to cyclinders, I have spark on all 6 cyclinders but some are stronger than others. When the motor is hooked up on the hose it runs good, the throttle will open all the way and it will run good but as soon as you put it in the water I have no power. A couple of days while it was hooked up to the hose and I was checking some things out, it started running the same way that it does in the water, now it will not even idle while on the hose unless you give it a little throttle and it is now missing really bad. It is also leaving a black smutty residue on the propeller and on the grass while running. Any suggestions would be greatly appreciated. <br />Thanks,<br />JAthans
