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I had to remove the Volvo seal, because it had worn into an oval and leaked like a tap.
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Was this caused by a 2 bladed prop being out of balance ?

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No - we had a three bladed fixed at the time and it was perfectly balanced. There were a couple of broken engine mounts that probably didn't help, and may easily have caused the problem. As you can imagine the boat was in a bit of a state when we took her over.

Reading through the various replies, I still stick with my original thought. Volvo seals are good, but to claim that they are the 'PREFERRED OPTION' is overstating their efficacy.

Choose a shaft seal that will suit the situation. Personally, we have never had a problem with our PSS seals, and I could claim that therefore the PSS is the Rolls Royce. I don't claim that, and try to have a more balanced approach. (Perhaps I have a chip on both shoulders to make me completely balanced?)

On our own boat, the engine mounts have been replaced and we now have an Aquadrive shaft coupler which takes all the wobble out of the arrangement, and we have a super quiet boat when under power as a result.

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“When you discover that you are riding a dead horse,
the best strategy is to dismount.”

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