I was going to take the boat out last week and started it up in the driveway with a water hose attached. (I've done this multiple times in the past, no issues) I got the motor started and I was letting it heat up to see how the idle was and I noticed smoke coming out of the small hose in the back that's supposed to pee-out water. I immediately shut the motor down, and checked the drain hose. It was completely blocked up with mud (mud wasps I guess). I cleaned out the hose and was able to blow air through the hose, put it back on and started the motor up again. I had smoke coming out of the prop area and nothing coming out of the hose. Granted I didn't let it run for long, probably less than a minute, but it looks like something is still blocking water flow. I ordered the service manual "Service Manual, Engine specifications, maintenance, repair procedures" from Mercury Outboards when I rebuilt the carb, so I have their manual. Problem is I don't know what I'm doing as far a water flow goes. Any help appreciated!!