Okay, I have had some new developments.
Before I start, I would like to reiterate that I am in the US and the boat is in Ixtapa, Mexico
. I bought the boat in La Paz
and was having her delivered to Panama
. She is a 49 foot steel
boat, and the engine and transmission
were replaced by the previous owner before I bought her. The motor
mounts were replaced at the same time.
I was to fly to Panama
, meet the delivery
crew, and sail her back to Texas
from there. On the way to Panama, the crew pulled into Ixtapa because of transmission
Well, after replacing the transmission bearings they noticed a lot of vibration when running and the tranmission was hard to shift. The engine runs smoothly and the transmission shifts smoothly with the propshaft disconnected.
They hauled the boat and told me I needed a new prop shaft. I agreed to have one made, which was done by a local machinist. They installed the shaft, put the boat back in the water
, and waited a day to do the final alignment. After doing the best alignment they could, they tell me there is still a large amount of vibration.
They disconnected the propshaft coupling from the transmission output flange and rotated it 180, then 90 degrees, testing the amount of vibration at each point. They tell me the the vibration changed a lot depending on which bolt holes were aligned when they bolted it together. None, however, were acceptable.
The crew has now got discouraged and essentially told me they need to go home so they can do another delivery
. Suffice it to say I am irritated that this crew is leaving me in a difficult spot with a broken boat and now I have to deal with the rest of the delivery.
Here is where I need help. I need to fly down and get my boat fixed, and I want to have my ducks in a row before I get there. Most of my repair books
are on board, so I don't have a lot of reference materials here at the house to work from.
I thought aligning the shaft was a pretty straightforward procedure. In this case, since the vibration changes dramatically depending on which bolt holes are selected to connect the prop shaft to the output flange, it seems to me that the coupling is probably the problem. Am I correct in thinking that it should not matter which bolt holes are aligned between the coupling and transmission flange when they are bolted together?
All comments, thoughts, and suggestions are welcome. Thanks!