Home › Forum › Ask A Member › Changing the shift rod seal on my Johnson CD-12 › Re: Changing the shift rod seal on my Johnson CD-12
I never have had to drill before tapping either. I never tap past about half way. All that is needed are a few solid threads for the bolt to grab and it can be driven out with a punch on the end of the bolt that is threaded into the bushing. If it were tapped thru it would undoubtedly shorten the life of the bushing. The shift rod would then only be supported by the peaks of the threads. At least it still has a decent land to bear on if the threads only go half way through the bushing. Remember that the bushing is there to guide the shift rod and the O-ring is there to seal it. If the bushing is badly worn, the seal won’t last long. I also put some Scotch 847 at the leading edge of the bushing when I reseat it to help seal the outside.
-Ben
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