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    losing lower unit oil

    Hey people, I wanted to catch yall up on my problem with the lower unit on my johnson 15 horse. I replaced all my seals and o rings including the shift shaft o ring and im still losing lower unit oil. Can I have a crack in the gearcase? I dont see one, and oil doesnt come out unless its running.
  2. S

    losing lower unit oil

    I have a 79 johnson 15. I have filled my lower unit then ran the thing in a barrel of water. I lose most of the oil on top of the water but there is not a trace of water in the oil. how can this happen? I replaced prop seals and shaft seals too.
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