stuffing box

Discussion in 'Inboards' started by tropicalbuilder, Jan 10, 2012.

  1. tropicalbuilder
    Joined: Jun 2010
    Posts: 49
    Likes: 3, Points: 0, Legacy Rep: 38
    Location: costa rica

    tropicalbuilder Junior Member

    Hi guys ..
    my sailboat (1979) comes with a traditional stuffing box with the box itself screwed on the shaft log and bolted to the hull .
    I see that nowdays most of the stuffing boxes are clamped to a hose that is then clamped to the shaft log.
    Is this "hose" solution better?? Why?
    Should I change to the "hose" arrangement? (I'm already in a major rebuilding project)
    I was also thinking about dripless seals .... any advice??

  2. tunnels

    tunnels Previous Member

    Has it given any problems in the past ?? usually has hemp or some kind a graphite imprenated string as a seal inside and packed with grease so if there is a drip you can slacken off the lock nut and tighten the main nut a fraction to tighten the seals and then retighten the locknut again or you could even just pump a little more grease in the grease nipple somewhere ! The hose is only so it will self align a small amount and if the hose or the clips crap out then you have a fast leak instead of a slow leak . suit your self ! if its not broken why try fix it ?? I never seen anyone ever replace anything to do with the older style , :idea:::D:p
  3. PAR
    Joined: Nov 2003
    Posts: 19,128
    Likes: 497, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Unless it's got a problem, I'd just pull a full service on it and worry about the other portions of your project. In other words, inspect the fasteners, remove the gland nut, clean things up, replace the packing and reinstall with new pieces as required. A dripless setup is nice, but not inexpensive, so why tear out what just needs some maintenance, unless you have to.
    Joined: Oct 2002
    Posts: 4,519
    Likes: 111, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Use one of the new modern $$$$ (Duramax) shaft packings and its drip free after the first adjustment.

    Second choice is a long hose and a grease gun to stop the drips every time you secure the boat.

  5. jehardiman
    Joined: Aug 2004
    Posts: 3,690
    Likes: 1,077, Points: 113, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    The classic stufing box required a better fit and higher tollerance deadwood bore. The new systems are installed with a sloppy fit large dia sterntube so the hose is needed to allow shaft tollerance float. They are cheaper to build and install, not necessarily a better solution.
  6. broncobilly60
    Joined: Jan 2012
    Posts: 9
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: san jose ca.

    broncobilly60 Junior Member

    I always heard that those type of stuffing boxes should leak a little otherwise the packing is too tight and will burn up.
  7. Bglad
    Joined: May 2010
    Posts: 175
    Likes: 5, Points: 18, Legacy Rep: 67
    Location: Jacksonville, Florida

    Bglad Senior Member

    Dripless are convenient and fairly reliable but depending on the type may require shaft removal to service. Some allow installation of spare seals inboard on the propeller shaft which you can change on the fly. If you are cruising on a budget (who isn't) stick with the packing gland it is serviceable with new packing from inboard and you can get it anywhere.

  8. sdowney717
    Joined: Nov 2010
    Posts: 1,175
    Likes: 84, Points: 58, Legacy Rep: 274
    Location: Newport News VA

    sdowney717 Senior Member

    get the modern GFO marine packing. Runs basically dripless honestly.
    Mine does not weep or drip at all.
    No need to buy an expensive new setup, uses your old packing nut.
    AND it lasts a very very long time.

    I have this on shafts and rudders.
    there is no point to using anything else anymore. Unless some people who like to burp their rubber bellows.

    Seriously why waste the money for something with rubber bellows and cooling tubes which will need replacing. And you can change GFO packing in the water not that you ever will have to change it. I suppose if the shaft is in terrible condition it will wear.

Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.