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Old 05-06-2018, 10:19 AM
sdemore sdemore is offline
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Vibration Problem

Question on what to check in my drive system. On this C&C 30 project boat I got, the engine runs really smooth until I put it in gear. I rebuilt the engine when I got the boat last year and it has now been in the boat for about 8 months. When I started this process, you could certainly feel a vibration, but not a bad one. The shaft alignment is dead on. The drivetrain now has about 20 hours on it and each time, the vibration gets worse. It is now to the point that the lids on the cockpit lockers rattle and just makes a terrible noise and feel. There is no vibration when you shift into neutral.

This is my first experience with a sailboat (or an inboard), so I am still learning. When I put everything together, I dug everything out of the stuffing box and packed it all the way full. I had to adjust it pretty loose (barely finger tight) to get any water to drip through. I put ablative paint on the prop, but it doesn't look like it has changed to throw things out of balance.

Any suggestions on what I should be checking? Can you over pack a stuffing box, could the cutlass bearing be going out and causing this? Any other thoughts?

Thanks,
Steve
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Steve Demore
S/V Doin' It Right
Pasadena, MD
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