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First the coupling was unbolted from the transmission. A nut held the tapered shaft in place. I elected to do this job myself because the boat yard planned to use a slide hammer on the shaft to remove the shaft from the coupling. A previous yard did this to another boat I had and the transmission rear seal leaked from then on. I decided it would be better to just do it myself . With the nut loosened on the shaft and a 3/8” socket as a spacer I put 2 longer bolts back in and used the transmission flange to put some pressure on it. I then used a 30 mm shaft coupling spaced about 1/8” behind the coupling. Using a screwdriver as a pry bar between the two couplings the shaft coupling popped off easilly.
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New shaft seal installed. Note the addition of a 30 mm shaft coupling flush against the PSS Stainless collar. This may be anal retentive but for an extra $20 it seemed like a good idea.
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For the seal’s vent I used 6’ of 3/8” heater hose. It was run through the engine bay and up through a dead space in the companion way. You can see it exiting the engine bay behind the water strainer.
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One down side to this changeover is engine alignment is more difficult. You cannot just slide the coupling back to check alignment because the coupling pushes against the transmission.
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