11-25-2015, 06:50 AM
I would recommend you have the shafts aligned to factory spec of no more than .003. At .006 I would expect a vibration (although it should be minor) or at least you can expect more wear and shorter cutlass bearing life. Had shafts aligned on my 38 Open w/450 hp Cummins when they showed .004 and .005 on the coupling. Results were good and I feel the boat is now quieter (maybe wishful thinking). M2C