Reply To: 1941 Mercury KB-3 Top Crank Oil Seal?

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January 22, 2023 at 11:18 pm #271615
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    7414 is slightly thicker 0,188″  Should work OK ,but, will need to be seated slightly deeper in pocket to be flush. It would have to be touchy application for 0.032″ difference in seal thickness to affect situation. I would still go with 7415 when sourcing a seal. I have used general industrial 7415 and have tried NAPA version intended for use in automobile transmission. The shell of NAPA did  not appear as robust or corrosion resistant.  I believe that for the limited use a restored motor might receive that corrosion resistance is the important consideration.

    so it seems to me

    Louis