Prop shaft seal questions

Discussion in 'Inboards' started by DougCim, Aug 5, 2010.

  1. DougCim
    Joined: Jul 2010
    Posts: 40
    Likes: 3, Points: 0, Legacy Rep: 42
    Location: IL,USA

    DougCim Junior Member

    I am pondering building a pedal boat, and using props run out the side of the hull. Since the shaft and prop will be below the waterline, the shaft needs a seal. The boat will be fresh-water only, and since this is a "car-topper" size, the boat won't be stored on the water.

    I don't know a thing about these types of shaft seals, other than McMaster-Carr sells a bunch in a variety of sizes. The buna-s ones say they are for water pumps; I'd guess that is what I'd need.

    Are these basically the same thing that boats use?
    Do boats use more than one in-line?
    Does the seal need to be backed up with oil?
    Last edited: Aug 5, 2010
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Seals for water pumps will work fine.
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