Gearcase Lubricant

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  • May 22, 2021 at 3:18 pm #238772
    jimneta
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      I have two Johnson 3-hp outboards,1951 and 1952. What is the proper oil for the gearcase? The service manual (1968) for the 3-hp states OMC Type “C,” but what is the equivalent to this today?

      May 22, 2021 at 3:22 pm #238773
      frankr
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        It (1968) says Type C because that is what OMC made then. In 1951-52 they specified “hypoid oil”. Forget all that and just use common 80-90 wt outboard gear oil. Available ‘most everywhere.

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        jimneta
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