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  1. O

    Evinrude big twin 40

    That’s very helpful, thank you. Because before I knew it the entire thing was in pieces. The oil seal under the water impeller was shot. Once that was removed the fun began. Top drive shaft bearing was in pieces. Steel on aluminum, and two plus days later I have it out. Some scratches on...
  2. O

    Evinrude big twin 40

    Have the lower unit off. Bingo!
  3. O

    Evinrude big twin 40

    I live in southern Minnesota.
  4. O

    Evinrude big twin 40

    Well folks I’ll have to go ahead and change the seals in this lower unit. Found new washers for vent and drain. I use Sierra brand type c lube. Ran it at the lake this morning, still came out looking like chocolate milk. I have had the parts on order for a few days. I’ve changed the water...
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    Evinrude big twin 40

    Well all be go to…. It says Lark on the back.
  6. O

    Evinrude big twin 40

    Don’t think so, I save each drain store in clear bottles. Some have been still for over a month. A thin layer of clean oil near the top.
  7. O

    Evinrude big twin 40

    Thanks I’ve done a lot. No vacuum yet, I think I’ll just replace the seals. Would you think the screw washers are bad. I’ll change those 1st.
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    Evinrude big twin 40

    Yes right away
  9. O

    Evinrude big twin 40

    I have a 1967 Evinrude 40 hp big twin electric shift. My issue is with milky lower unit lube. Had it air pressure tested and held for a full day. Fella told me it looked like the seal had been changed. I’ve changed lube a few times this summer, it’s worse after I run it in higher rpm’s. To me...
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