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Recent content by sflynn006

  1. S

    1971 Mercury 40 4hp Lower Unit

    Hi, I have a '71 Mercury 40 4 h.p. Thunderbolt ignition. I have a question concerning the lower unit. I'm in the process of changing my gear lube down there and have the old lube drained from the fill and drain screws on the right side (looking from the back) of the lower unit. But I noticed...
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