I have a couple of quick questions on the outboard that came with my M-17. It is the original 1981 Evinrude Yachtwin 4hp two cylinder long shaft that came with the boat. I had the spark plugs and water pump impeller replaced on it when I got it. It works fine now, but the main issue I have with it is about how much should it be in the water? As it is now mounted on my M-17, it only sticks in the water to the first widening of the shaft above the propeller (you may be able to tell that English is not my mother tongue :-)). My concern is this: way higher above the waterline there are a number of small holes in the shaft, and when running the motor there is smoke and a slight spewing of water coming out through them. This smells, and is noisy. Plus the exhaust seems to be unusually "smoky". The motor has not been used for about 6-7 years. Could there be some slush-old oil in the carburetor/cyclinders that make the mixture be weird and which when run produces the smoke? Do you think I should have the carb rebuilt or at least cleaned up? On my Compac 16 I have a very old (I guess, 1946) all-metal 3hp Evinrude with integrally mounted fuel tank. For some reason, there were none of these holes above the waterline in the shaft, and it seemed much quieter. Its exhaust was under the cowling, and I never saw much smoke coming out. Andrei.