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Thread: Prop Shaft Lock

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  1. #1
    Join Date
    Dec 2007
    Posts
    132

    Default Prop Shaft Lock

    Perhaps a simple question, but I am wondering how people lock off their prop shaft while they are charging their batteries under sail. If I put my transmission in neutral while sailing, the shaft spins like mad. I typically put the transmission in reverse with the engine off to lock the shaft with the folding blades closed.

    I would like to lock the prop off to charge the batteries, but in a way that can easily be overridden if I need to engage the engine in an emergency situation (i.e. without having to go below, undo something from the shaft, etc.). Any ideas?

  2. #2
    Join Date
    May 2009
    Location
    San Francisco
    Posts
    113

    Default

    On locking the shaft by putting the transmission in reverse... note that works for folding props but will lock most feathering props open (ie you are sailing dragging a bucket behind you). Maxprop recommends turning the engine iff with the transmission still in gear... the boats forward motion will then feather the prop...and then later putting in neutral. Best wishes!

  3. #3
    Join Date
    Jan 2013
    Location
    Montara, CA
    Posts
    803

    Default

    Quote Originally Posted by JimQuanci View Post
    On locking the shaft by putting the transmission in reverse... note that works for folding props but will lock most feathering props open (ie you are sailing dragging a bucket behind you). Maxprop recommends turning the engine iff with the transmission still in gear... the boats forward motion will then feather the prop...and then later putting in neutral. Best wishes!
    Oh my. I think I've been dragging a bucket. I've been putting my relatively recent MaxProp in reverse when I sail. Looks like I need to go back and read the instructions more closely. Dang....

  4. #4
    Join Date
    Sep 2007
    Posts
    3,688

    Default

    Uh oh. Now she's gonna start beating us.

  5. #5
    Join Date
    Jan 2015
    Location
    San Francisco Bay
    Posts
    156

    Default

    Quote Originally Posted by Gamayun View Post
    Oh my. I think I've been dragging a bucket. I've been putting my relatively recent MaxProp in reverse when I sail. Looks like I need to go back and read the instructions more closely. Dang....
    Depends on your setup...My Yanmar recommends leaving transmission in neutral.

  6. #6
    Join Date
    Jan 2013
    Location
    Montara, CA
    Posts
    803

    Default

    Quote Originally Posted by The Smokester View Post
    Depends on your setup...My Yanmar recommends leaving transmission in neutral.
    Yes, I used to keep it in neutral when I had the fixed prop on. My engine is also a Yanmar. Does the same hold for the folding props? Argh. Just when I think I have SOME of these things figured out.....

  7. #7
    Join Date
    Jan 2015
    Location
    San Francisco Bay
    Posts
    156

    Default

    Quote Originally Posted by Gamayun View Post
    Yes, I used to keep it in neutral when I had the fixed prop on. My engine is also a Yanmar. Does the same hold for the folding props? Argh. Just when I think I have SOME of these things figured out.....
    We need to do an experiment...

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