Home › Forum › Ask A Member › Are my clam shell gear case half's mismatched? RDE-17 25 hp 1955 Johnson › Reply To: Are my clam shell gear case half's mismatched? RDE-17 25 hp 1955 Johnson
I have done several skeg seals on these split clamshell gearcases without any issues. Knowing they were line bored after assembly as a matched set, I am careful about it and I always dry-fit them before adding sealer and putting them permanently back together. With all the parts installed and everything clean I put the halves together and look for daylight between the halves and check the gap with a very thin feeler gauge or piece of metal shim stock while pushing the halves together. If no gaps are found, I go ahead amd seal it up. So far so good. Keeping the set matched is preferred, but they generally do interchange acceptably in my experience.
-Ben
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