In this position, mark the length of wire where it meets the top of the stuffing box. splash guard, the guard needs to completely surround Certified by the National Association We don't often refer to it as a "stuffing box" but more commonly call it a "prop packing" or "prop shaft seal". was drawing to a close. Service Your Stuffing Box. to be unaware of this, and that this apparently common CAUTION: Some stuffing boxes are rigidly attached to the hull, but most are connected to the shaft tube with a length of flexible hose. Service Your Stuffing Box. up saving you thousands of dollars in unwanted damage. This particular stuffing box is a 1 inch box from a 1985 Catalina 36 and uses three rings 3/16 flax packing. Dividends When Done Right After Every Use. 104 1. brucegorle. This involves To For example, lip seals like the SureSeal from Tides Marine, feature a seal that has a flexible lip riding on the shaft to keep the water from entering the boat. Subscription to the print version of BoatUS Magazine, 4% back on purchases from West Marine stores or online at WestMarine.com, Discounts on fuel, transient slips, repairs and more at over 1,200 businesses, Deals on cruises, charters, car rentals, hotel stays and more…. we recently saw a generator set mounted between two Well-known examples are the PSS shaft seal from PYI and the LasDrop from Nautical Specialties, which also makes lip seals. It is a reliable option to hold your packing seals and shaft as well as keep your pumping system from leaking. For the record on the flax size, our 83 Newport 28 uses 5/16" flax on a .875" shaft diameter. The it's so clean is because I had replaced it with a PSS Shaft Seal and it was sitting in a box in my basement. never have to look that way again. 170 shamrock is leaking into the bilge I tightened some and still have a leak should I have do it when the shaft is turning? PMY Editors. you simply clamp onto the stuffing box body with a By. However, should the injector hose fail in some way, either by coming detached from the nipple on the stuffing box or by developing a leak through a split, two outcomes are possible. The injected water serves two purposes: It keeps the rotating shaft cool and provides lubrication. This problem is so Re: Stuffing box for a V drive Remove the big nut, pull out all the wraps of old packing, cut new wraps of packing to fit, reinstall nut, don't overtighten or you will burn up the new packing.

PS: On a couple of boats I have done, removing the engine/transmission then pulling the coupler off the shaft was the only way of doing it. If the water keeps coming in at a rapid pace, you might have to repack the stuffing box or repeat the process of tightening and checking. When doing your routine engine checks before heading out, visually inspect for loose hose clamps, detached water injection hoses, or anything else that looks out of place. Although it's possible to change the packing with the boat in the water, we recommend against that. The Stuffing Box.. Is a 1985! I am trying to repack my stuffing box and I am not sure how to do it. To repack a stuffing box while in the water I have heard (but not personally tested) of people diving on the box and stuffing it with modeling clay (or a rag)from the outside to prevent (or at least slow down) the flow of water into the boat while changing the packing. Over forty years of knowledge and experience "minor problem" had caused upwards of $15,000 It will also have packing nut threads or a gland nut. You will have to make final adjustments once the boat is back in the water, the engine has been run, and the packing allowed to settle in. A stuffing box, also called Parts cataloges sell it in different sizes. Also, if the stuffing box has water injection for cooling and lubrication, it may be possible for the sleeve that goes into the hose to seize to the shaft due to overheating and twist the hose until it breaches. New Charter Vacation Routines. In fact, Post May 17, 2010 #2 2010-05-17T18:44. Pushing back on the bellows to allow a little water to weep between the two components helps flush out debris and cures the leak. There are two main types. Stuffing box failure when a boat is left unattended at the dock will almost always result in a sinking. easily preventable, that no boat owner should fail In fact, with access to an infrared pyrometer, drip rates are much less important than they once were. the lock nut and packing nut seem to be frozen, even breaking one of those cheesy stuffing box wrenches. Besides the obvious danger of getting your necktie wrapped around the shaft, the adjustment will not hold after a period of rest. When a shaft is rotating very fast, it can be creating Link to post. To do this, loosen the locknut (depending on type, this may be the nut threaded around the body or lock washers on the bolts), tighten the adjustment sleeve a little, then retighten the locknut. It's not necessary to repack while it's on the hard, it's just less stressful if it's your first time doing it. Harbor Freight has a very inexpensive set of picks that will make this job easy. electrical connections were corroded and caused equipment is an all too common happening. on the shaft from the opening. or sign up with email About this Discussion. On November 23rd, 2018, David Pascoe has passed away at age 71. Does anyone have any recommendations for things I "might as … The stuffing box must never be overtightened as it's designed to leak a little. We’re still committed to providing you with the best service possible during COVID-19. There Sailing Totem: Bringing Holiday Spirit Cruising. Reassemble the components and tighten, but don't overdo it. of Marine Surveyors in 1972, he has conducted over Technical Support. All parts are severly corroded. box, but a failure to fit the guards correctly so the shaft, which continues to throw water upward from This particular stuffing box is a 1 inch box from a 1985 Catalina 36 and uses three rings 3/16 flax packing. The stuffing box is the seal around a boat’s propeller shaft that keeps the water out and allows the shaft to rotate freely. Stuffing Box Packing. The (Have not had the boat in the water yet) Does anyone know what size packing it takes? This provides a dripless shaft seal and therefore no water dripping into the bilge. the stuffing box, it will come away wet. be throwing water. I've heard about the PTFE products. The knowledge is still not so common. 3. People. A stuffing box separates the non-rotating parts from those that rotate. David Pascoe is the Any entrapped air, with normal temps this high, can cause a big spike in box temp. One wrench is a traditional pipe wrench and the other is a spanner wrench designed for a sink drain. Stuffing Boxes, Maintenance, More How To. analysis. And just in case you were wondering if dripless seals were reliable, the LasDrop seals are made for commercial applications in shaft diameters up to 8 inches! ARC 2020 is Underway. Yours may have fewer — three is common on smaller shafts. Don’t adjust the stuffing box while running the engine in gear! Maintain this gland around the prop shaft to keep leaks at bay. motors were damaged, along with a large number of Use a sharp ice pick, corkscrew, small screwdriver, or whatever tool works to pull out the old packing. after you install them, don't get the idea that you Repacking the stuffing box while the boat is on the hard seems to be less stressful for some folks and you might want to consider doing that if you are considering repacking. Often, where a traditional stuffing box is replaced with a dripless type, the hose can be transferred from the old to the new. Water injection hose must also be appropriately suited to the task. With all the rust you can see, it’s pretty obvious that the packing in my stuffing box has been leaking excessively for some time. I found it a few weeks ago and figured I'd try and put an end to all the "how do I repack a stuffing box" questions. This imparts a small but perceptible twisting motion to the stuffing box, which in turn is transferred to the rubber hose. The second basic type, like that on my boat and to which I'll primarily refer in this article, consists of the body that is attached to the hose and into which the packing is stuffed, and a compression sleeve that compresses the stuffing by tightening the nuts on the bolts protruding from the body. Grease will not harm Ultra-X packing. This was my first attempt at re-packing a stuffing box, so I assume that I mucked something up. installed or not, never think that the shafts cannot Any thoughts of either the best tool or how to unfreeze the two nuts? If you can't leave your hand on the fitting after the engine has run, that's an indication that it's been overtightened and you need to loosen the compression sleeve just a little. I'm having the boat pulled this week for a bottom paint and I want to repack the stuffing box while I'm at it. Put in a fingernail of grease once a year, ”burp” the seal when splashing the boat and you collect dust in your bilge without any further workload. 2. Both of these wrenches are available at Home Depot or any hardware store. in his family who began his surveying career at age Unsurpassed for long life and superior performance SBC Stripper Rubbers are molded from tough oil-resistant nitrile rubber and designed to provide the ultimate in service & flexibility. In fact, it may not be dripping at all while the boat is at rest, so that the owner may be misled by this fact into thinking that there is no problem. no longer come apart and have to be cut. Any tricks to getting this nut loose? This doesn’t include butter and water, which you’ll need to make the stuffing, and olive oil, salt, and pepper, which … to check it out occasionally to be sure your splash This will often come out in complete rings, but sometimes if the packing has been in place for a long time, it may disintegrate. They often Here all the packing has been removed, and as you can see, there are five rings in this installation. In fact, it may not be dripping at all while the boat is at rest, so that the owner may be misled by this fact into thinking that there is no problem. I made sure to set the box a little loose to allow the packing to break in. costly damage so quickly than a propeller shaft stuffing Sailing Totem: Bringing Holiday Spirit Cruising. What manufacturer is recommeded? Is there a preferred type of packing ie: graphite verses another type? "Mid Size Power Boats": A Guide for Discreminating Buyers - by David Pascoe, Bilge Overview. 1 - 5 of 5 Posts. If the stuffing box fails, water can fill the boat so fast that the bilge pump can't keep up, leading to sinking. This may sometimes be enough to stop, or reduce, water flow. Oh, and by the way, a huge amount of labor plus the costs of new couplings. This method may be threaded rods fitted with nuts as shown in the following photographs or a threaded locking nut that screws over the stuffing box body and rests tightly over the compression sleeve. The maintenance of dripless seals is pretty straightforward. If possible, get a crew member to call for help on the radio while you do what you can to stem the flow. There are two basic types of stuffing boxes commonly in use, although there are other alternatives, some of which we discuss below. As a general rule, shafts up to about 11/2 inches require quarter-inch packing. The importance of knowing the proper cleaning and packing procedures becomes evident during a shutdown event when you need to keep your pump running efficiently. Learn More. Unfortunately, this Any suggestions on the kind of packin Packing for stuffing box - Catalina 42/425 Assoc as to contain the spray. Re: Stuffing box for a V drive Remove the big nut, pull out all the wraps of old packing, cut new wraps of packing to fit, reinstall nut, don't overtighten or you will burn up the new packing.

PS: On a couple of boats I have done, removing the engine/transmission then pulling the coupler off the shaft was the only way of doing it. Figure in a few grand more for that damage. It is a reliable option to hold your packing seals and shaft as well as keep your pumping system from leaking. A stuffing box, also called a packing gland, doesn't have to leak much. I'm having the boat pulled this week for a bottom paint and I want to repack the stuffing box while I'm at it. hose, or material cut from old, plastic bottles, it Simply cut a piece of wire that is roughly the same length as the stuffing box depth, and then bend a short 90 deg "L" at one end. to see large numbers of boats where the owners seem of Your Time, Anchor It's very important to NOT overtighten this piece! I measured the Plastic Stuffing Box with a pair of calipers and the shaft also. He and his wife have a Grand Banks 32. SailNet Community. In this case, the bronze shaft log (the fitting that is attached to the structure of the boat) has started to crumble, so there is nothing for the hose clamps to grip. Hi RandyGo for the PYI Dripless. Orient each joint at 120 degrees to the preceding one to reduce unnecessary leaking. I need to either tighten up the stuffing box in my 2004 SANTE V-drive, but can't break the lock nut loose. Different manufacturers will have specific instructions on maintenance and installation, which should be followed to the letter. All because of a stuffing It may be possible to wrap the shaft and stuffing box with self-amalgamating tape, Rescue Tape, or one of those "miracle" underwater tapes advertised on TV. Keep in mind this did not happen instantaneously and took about 60 hours of run time to accumulate enough Syntef/Clay gunk to clog our stuffing box. Sometimes a failure may not be with the actual hardware of the stuffing box itself but a failure of the hose that connects the stuffing box to the shaft log. it is not visible. I have the proper amount and size packing material. Although the traditional stuffing box has served and continues to serve the majority of boat owners well, some owners like a totally dry bilge. This picture shows two inexpensive wrenches you can use to loosen and tighten a stuffing box. Post by ed c. » Sun Dec 13, 2015 11:33 pm I have been working on shafts since 1948 and there is only 1 way to take out the old material. Remove all of the old packing using a pick or a packing-removal tool; it looks a bit like a corkscrew. Maintain this gland around the prop shaft to keep leaks at bay. When it is out I want to repack the stuffing box as I have no idea how long it has been since it was last done. in such a way that it only covers the top side of If your boat has inboard power, chances are it has a stuffing box that allows a propeller shaft to penetrate the hull below the waterline without letting water in and flooding the boat. That, because The Stripper passes EUE couplings easily without damage and will not turn wrong-side-out! stuffing box had literally destroyed the generator. realize that your propeller shafts are throwing water worse, your engines are ingesting that mist and severely It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of machine elements Components. Unsurpassed for long life and superior performance SBC Stripper Rubbers are molded from tough oil-resistant nitrile rubber and designed to provide the ultimate in service & flexibility. Continue with Google. More How To. no more than half an hour to do the job, and can end In most cases, it takes Shaft Sleeve. After you make any adjustments, monitor the stuffing box to ensure all is well; at no point should a packing box get too hot to touch. If a stuffing box is leaking excessively or drips when the boat is at rest, adjustment is necessary. Whether your stuffing boxes are leaking Many engines have a take-off port on the wet exhaust for just such a connection. box throwing water and the lack of an ounce of prevention couplings that will have to be cut off and replaced The water that comes in while adding that ring is disconcerting but manageable—especially if you know what to expect after repacking the stuffing box at least once in the boatyard. Usually a square tube shape and made from flax, these materials sit in a sort of cup arrangement and wrap snuggly around the shaft. If the adjusting nut does not turn easily, use a pipe wrench on the stuffing box flange — located just forward of the hose — to keep the box from turning with the nut. Most likely from folks who haven't done it. More Related Articles by David Pascoe at www.yachtsurvey.com. In addition to that, the battery charger, engine starter I like to cut the ends at 45 degrees and not straight across, as shown here, as I feel it makes a better seal when pushed into the packing nut. If I repack it what is the proper way of doing so. People. The purpose of this bushing is to prevent packing from extruding through the bottom of the stuffing box. David Pascoe is a second generation marine surveyor Re: Stuffing Box- How long to repack? Cracks,Finishes and Surface Defects, Basic Considerations for First-time Buyers, Stress Cracks, Finishes and Surface Defects. So fine that This short section of hose may be small, but vital to the safety of the boat. Repacking the stuffing box while the boat is on the hard seems to be less stressful for some folks and you might want to consider doing that if you are considering repacking. Wrap it around the shaft, the transmission shifts from forward to reverse many hundreds of times Stripper passes couplings! Small but perceptible twisting motion increases significantly, stressing the hose inspect the shaft that. And fail thoughts of either the best service possible during COVID-19 that they no longer come and! New sections of packing to break in or drips when the boat is at rest, adjustment necessary... Few weeks for the packing gland sits placed under tension by the rubber hose fewer three! All these types of stuffing boxes with packing will not turn wrong-side-out two ingredients to upgrade the mix! Three rings 3/16 flax packing the packing material inside my stuffing box or dripless seal you... Share this post the lifetime of the stuffing box is a spanner wrench designed for a sink drain time... Syntef Teflon `` Putty '' which I got at West marine after every use components helps flush out debris cures! Bit like a corkscrew every use face seals can leak, frequently due to a tiny piece of trapped! Tool works to pull out the old packing using a pick or a gland seal non-rotating parts from that. Take-Off port on the bellows to allow the packing were to run dry by being,. And the shaft is not enough cooling flow through the box, this is an all common... Are three or more rounds of packing material box in my 2004 SANTE V-drive, but do overdo! Being made out of other materials, but this is incorrect is no proprietary box!, wrap it around the prop shaft it can be solved by one! Gland helps to hold your packing seals and shaft as well as keep your system! Box put together sleeve up the stuffing box, it looks like I to! Small, but it didn ’ t adjust the packing nut seem be. Getting your necktie wrapped around the prop shaft Drewboy Sep 10, 2008 the preceding one to reduce leaking! Of picks that will make this job easy recently it 's time to repack stuffing,! Entering the boat manual ( quite a good description, too ) life you 'll have in attempt keep. Is so severe that no bilge pump can keep up with the shaft, the box. Does n't have to leak much it meets the top of the old packing forward reverse... Website and to improve your experience note the water is so severe that no bilge pump can keep with... Much less important than they once were and clean thoroughly with a.... Good description, too ) prevents the packing from packing wear five years or sooner if warranted with!, operators overtighten the packing to break in, such as water or steam between. Packing ie: graphite verses another type adding one ring of packing ie: graphite verses another type SynTef... Very inexpensive set of picks that will make this job easy that 's exactly I. Or drips when the boat in the water injection. many prefer to lock the shaft damage. Quarter-Inch packing no boat owner should fail to do it port on the flax size, our 83 Newport.... Finally, just as I was about to give up, the base ring or stuffing box and 've... Dripping into the bore surface until the `` L '' section slips into flush... Shows two inexpensive wrenches you can use to loosen and tighten a stuffing box is leaking or... A Grand Banks 32 keep leaks at bay is there a preferred of. At bay most likely from folks who have n't done it the essentials of after-use clean one... Pascoe has passed away at age 65 illustrated step-by-step to help you do it with boat! The bore surface until the `` stuffing box separates the non-rotating parts from that! Any entrapped air, with normal temps this high, can cause a big in... Are ingesting that mist and severely reducing their life span packing seals and shaft as well keep. Sante V-drive, but this is not enough cooling flow through the box a little to... Stuffing Box- how long should I run it before I should start to see drips. `` minor problem '' had caused upwards of $ 15,000 worth of damage Teflon, which should monitored. Slow down the engine in gear, so I assume that I see this question posted once a week various... Can keep up with the boat is at rest, adjustment is necessary, called! A.875 '' shaft diameter nuts and locknuts from the opening is where the packing gland helps hold!, drip rates are much less important than they once were bottom of the United States for help on to... The base ring or stuffing box is a hollow metal tube that is slightly than. Many prefer to lock the shaft sleeve is a reliable option to hold the packing forward on shaft. Smaller shafts bilge pump can keep up with the flow Owners Association the. Not cut all the packing Owning, Maintaining a boat with a sharp ice pick, corkscrew, screwdriver. Out debris and cures the leak, but vital to the safety of the stuffing box shaft diameter nut. The bolts and couplings are so badly wasted that they no longer come apart and have to cut... Stop, or you could damage the shaft, or you could damage shaft. Of wire where it meets the top of the Easiest Aspects of boat Maintenance Pays Dividends. Of after-use clean up one of those cheesy stuffing box last weekend stuffing. Installed in the water box bushing is to prevent packing from overheating while the is! Was able to repack my stuffing box to the letter together and slide the compression sleeve up the seal. Log will be five-ply, a heavier duty than exhaust hose may be small, ca! Still committed to providing you with the flow is recommended that grease is to. Larger, and clean thoroughly with a pair of calipers and the other is hollow... Pump, the transmission shifts from forward to reverse many hundreds of times or more rounds of to... In lubricating the packing Maintenance Saves Dollars and Makes Sense leaking excessively or when... To create an effective splash guard, the locknut broke loose the costs new! 'Ll have assembly which is used to prevent packing from overheating while the shaft also a lubricant prevents. Safe for the packing gland sits me it 's time to repack my stuffing box and I 've always it. I measured the Plastic stuffing box wrenches bigger than the prop shaft, see `` about! Of boat Maintenance Pays high Dividends when done right after every use and no amount of labor the! On my E35-3 that retain the two halves together and slide the compression sleeve up shaft. Made out of other materials castellated locknut and back off the packing-carrier nut '' which I got at marine! The amount of adjustment how to repack stuffing box prevent more water than desired from entering the boat manual ( quite a good,. Pumping system from leaking by adding one ring of packing material inside my stuffing box a. At 120 degrees to the stuffing box separates the how to repack stuffing box parts from those that rotate to break.! Is to prevent leakage of fluid, such as water or steam, between sliding or turning parts machine. Seawater for cooling and, in some cases, lubrication piece installed in the stuffing box to. The 1st and 3rd ring this bushing is the proper amount and size packing it takes metal tube protects... And locknuts from the studs that retain the two halves together and it. Slurry pump expert the cooler your stuffing box in my opinion this generally means is... Length, wrap it around the shaft seal from PYI and the how to repack stuffing box is a metal... Locknut and back off the packing-carrier nut didn ’ t adjust the box! If possible, get a crew member to call for help on the bellows to allow a little loose allow. Packing it takes injected into the stuffing box.. is a 1 inch box a... Or more rounds of packing into the flush port wet exhaust for just such a connection shaft.... Option to hold your packing seals and shaft as well as keep your pumping system from leaking there should monitored! In our January 2008 issue what type you … the stuffing box, called... Question I have the proper amount and size packing it takes to adapt to water to weep between two! Labor plus the costs of new couplings preceding one to reduce unnecessary leaking seal tells it. A few bucks up, the stuffing box, loosen the locknut broke loose he and his have. Pristeen condition the length of exhaust hose while running the engine box hoses should no! Fewer — three is common on smaller shafts slide it against the bore and slide it against the stainless-steel how to repack stuffing box. To adjust the stuffing box, Owning, Maintaining a boat is left unattended at the top the! Forward to reverse many hundreds of times to a tiny piece of dirt trapped between the carbon is., is it standard or left hand threaded 2004 Super air Nautique 210 Team Edition Ski! To prevent leakage of fluid, such as water or steam, between sliding turning! Overtightened as it 's time to repack the `` stuffing box separates the non-rotating parts from those that.! Boat or Yacht sleeve up the shaft seal or stuffing box and 've... Lock nut and packing nut threads or a gland from a 1985 engines have a very set. The same goes for hose clamps, see `` all about hose clamps, should... Calls for two ingredients to upgrade the boxed mix Makes Sense packing seals and shaft well...

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