Wondering if it makes much of a difference whether I have the mechanic adjust the valves and injectors with the boat in the water or out of the water. Only negative I can think of out of the water is that he cannot turn engines over to test. My babies smoke like Cheech and Chong when there cold – which I hear is somewhat normal for cold turbo charged Cummins 903’s, but hope proper injector adjustments may reduce it. Any feedback appreciated, thanks – Scott.