Vibration Issue

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Last post
#1 January 3, 2017 - 3:16pm
Soffel

Vibration Issue

I am getting a vibration in the boat when I get to 1500 RPM's or greater.  The boat has twin DD 8-71N engines.  A diver looked at the props last summer and said they seemed ok.  I was planning on taking the boat to Canal or CSR, but I didn't get a good feeling when I spoke to them on how they would solve the problem.  They stated they would have to pull the boat out of the water, look at the props, then pull the shafts, then keep eliminating steps from there.  All this without even taking the boat on a sea trial. My concern is that even after they do all that the boat may still have a vibration issue and the amount of hours required to determine the cause could continue to escalate. Are there methods to figure this stuff out?  Using a laser to check tolerances of the coupling and shaft???

Anyone know a good yard or mobile person that could do this type of work?  Or advice on what to do to solve a vibration issue?

Charlie