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  1. #21
    Join Date
    Mar 2005
    Location
    Hants/Lozère
    Posts
    4,836

    Default Re: New boat mystery - Additional propeller!

    Quote Originally Posted by NormanS View Post
    If you look under the double bunk in our aft cabin, you would find a prop there (plus nut etc, Jonathan). As soon as I bought the boat, I realised that the prop didn't have enough pitch. I bought and fitted an Autoprop, but decided that the spare was no use sitting at home.
    That's exactly our situation! The old fixed prop is under the cabin sole and, hopefully, will never be needed

  2. #22
    Join Date
    Sep 2001
    Location
    Home - Sothampton, Boat - Gosport
    Posts
    10,530

    Default Re: New boat mystery - Additional propeller!

    But it does seem props do 'wear out' or why swap props?

    A fixed prop can't wear out - unless it dezincifies, as there are no moving parts (I know the prop spins, but it doesn't move relative to the shaft. A folding or auto prop does have moving parts, so wear is inevitable.
    Steve
    Never believe anything until it has been officially denied.

  3. #23
    Join Date
    Nov 2009
    Location
    Home UK Midlands / Boat Croatia
    Posts
    20,985

    Default Re: New boat mystery - Additional propeller!

    Quote Originally Posted by Stemar View Post
    But it does seem props do 'wear out' or why swap props?

    A fixed prop can't wear out - unless it dezincifies, as there are no moving parts (I know the prop spins, but it doesn't move relative to the shaft. A folding or auto prop does have moving parts, so wear is inevitable.
    A fixed prop as attached to a saildrive does wear out .... or at least the insulation between the prop and the central boss does. The prop then has to be replaced. One of mine wore out in this way so I decided to replace both with folding props.

    Richard

  4. #24
    Join Date
    Nov 2008
    Posts
    6,981

    Default Re: New boat mystery - Additional propeller!

    Quote Originally Posted by Stemar View Post
    But it does seem props do 'wear out' or why swap props?

    A fixed prop can't wear out - unless it dezincifies, as there are no moving parts (I know the prop spins, but it doesn't move relative to the shaft. A folding or auto prop does have moving parts, so wear is inevitable.
    It's not entirely unknown for a prop to strike something in or under the water, and thus become damaged.

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