. It's possible for the prop to hold together after it has spun. If the hub is "spun", then it is slipping, so when power is applied the engine speeds up, but the hub just spins inside the prop. Engine would rev but the boat wouldn't speed up. Reinstall the propeller and go for a ride. You can go straight across in pitch (a 17p 3 blade = about the same RPM as a 17p Nemesis). Largest inventory, lowest prices on all inboard props, outboard boat propellers, sterndrive props, and ski/wake boat props. Thank you for bearing with me through this long post. Thrust and pitch are interrelated on propeller aircraft so there are multiple controls. for the first several outings. If we put a small diameter prop on an engine with a low pitch the chances are that the power of the engine is going to power through the ability of the propeller to grip the water and push the boat. Slipping is most likely either engine too high, or you have spun the prop hub so that the rubber is not not transferring power to the prop properly edit: Sometimes the best or only way to tell exactly what drive unit you have is to do a partial disassembly of the unit. Ground or special forces can stay safe with ACR's emergency equipment. SOLAS Rubex 107B Hub Kit. They should expand, rise to the surface and pop. When you look at the prop, if the punches do not line up anymore, your hub is spun. So, interesting! A lot of people think the 2-ply would be double the thickness of the single, but it isn’t so. Boat Props. Diameter The diameter is the distance across the circle that a propeller makes when rotating. ” When you’re trying to get the boat on plane at takeoff, a tremendous amount of pressure is on the propeller as it pushes the heavy boat forward. There is no Magic prop believe me. To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. I don't know how you measured your prop height when you set it, but it sure sounds like you either have it too high, you have spun the hub, or rolled an edge on the prop. The reason being is when propping a boat, we typically forget to account for the weights of multiple passengers, amount of fuel, coolers, equipment, provisions, etc. This is done as a precaution to protect you from a faulty tank. To ease the interference fit it’s liberally . If you have fresh scaring then more than likely you spun the prop. This is just example For load in your head calculations. Piranha Prop Finder. " So, summarizing, cavitation is from damaged blades, and ventilation is mostly from high mounting, without a prop that can handle it. . Check the rubber hub if it has slipped from it's original position. Then spin your prop by hand clockwise. If you can't find it in the manual, I can let you know what it is. Purchase a brand new solas aluminum prop, 15x13 to try and bring rpms closer to top end of WOT range. Loosen and remove the lock nut from the propeller shaft by turning it counter-clockwise with a ratchet, extension and a socket. Thanks for visiting the Bayliner Owners Club!! Please do us a favor by clicking on, then spending a minute visiting our advertisers. . New Member. 4-1/4 inch and 4-3/4 inch. First 2years no problem at all, but in the last year have spun the prop 4 times. . Have contacted a reputable prop shop in Cincinnati, the only one. I don’t condem anyone who has a different risk aversion than I do (and I don’t hand prop). Had it out twice last fall and the boat ran at 5000 rpm and 52mph with a 21 pitch 3 blade prop. . Propping a small engine is different from swinging the prop on a big radial, so we’ll stick with the four-cylinder Continentals commonly found on 1940s classics such as Cubs, Champs and Taylorcrafts. Educator and author Dr Jackson Katz discusses why all men need to be part of ending violence against women, and what they can do to help . When blades spin, a pressure difference between the forward and rear surfaces is produced, accelerated . I used to deal with them when I lived there. The plastic hub inserts used on many new props are simple to replace, and you can carry a spare and replace the plastic insert yourself on the water. Many boaters opt to carry a basic aluminum propeller as a spare to save money. If you can remember high school geometry, a propeller's diameter equals the radius times two. 1st - A spun hub inside of the propeller. . Blades that are ground down to remove bent or chipped edges create subtle changes in prop pitch, cup and diameter that can degrade performance. My 6HP outboard motor has a "Spun prop". . Yes, they're usually conical, self aligning, but install them a bit too loose and ptoing they go just a little cockeyed. i flew a couple of days ago and i had a prop problem. Turn the wheel hard over to starboard (or push the tiller hard to port), then give the throttle a sharp 1-or-2-second burst of power in forward. All propeller work and hub replacement should be done at the customer’s risk. . He is one of us. . . Engine Type: Honda (115-225HP, 75-90HP) # Splines: 15 Tooth Spline. Now please tell me if you think I'm "all wet" and making a mountain out of a mole hill over the discoloration and groove cut in the rear prop from the props rubbing. Pull the propeller straight off the shaft. Some parts are hard to get, especially from certain manufacturers, so don’t wait until you need them. Run it and check to see if the marks are still aligned to see if it slips. . Looking for a little insight. Still in doubt -- mark or file a small line on the inner and outer hub, put the prop nut back on and know for sure after a minute's ride. HELP FOR FRIEND ! A friend just bought a used boat recently,test drove it,all seemed good. DT Find your Ideal Quicksilver Propeller. (856) 785 9455. In my experience when you hit something hard enough to bend or break a stainless prop blade (s) so badly you can’t run with it, the prop shaft gets bent too. The causes of cavitation have always been somewhat of a mystery to us, so we asked some prop experts to give us the technical explanation for this phenomenon. . No noise no vibration. It would be easy to notice a spun bearing. . you can change a prop, no problems. My grandfathers prop done this on a trip at Kentucky Lake in the 80s . Using prop walk, you can pivot a boat in place, or nearly so. It will allow too much exhaust to flow over the blades of the prop and not grab enough water. Regardless of the type you have or where you purchased it, every propane tank must be checked within 12 years of the date it was manufactured. It had not yet spun that I know of, but I can't think of a worse scenario. com. To properly determine prop slip, users must know several determining factors, including speed, RPM, drive ratio and propeller pitch. The professionals at Livorsi use this algorithm to determine prop slip: For instance, let’s say a boat is traveling at 61. Breakage of the propeller can occur . . The hub is press fitted into the center of the prop, Generally, you have to hit something hard with your prop to break the rubber. By the way, try painting the prop white or two blades white and one blade orange. If you do feel like you remember some of the most popular characters of the '70s and you're one of those people who can always match a name to a face, then maybe this is the quiz for you. It’s tossed in the trash heap. Was on Palestine Yesterday and was fixing to leave a cove and i started to plane out and it just stopped going. Likely you will hear a ticking as you spin the prop. For Comparison's Sake: Prop Hubs. Did you run aground or get a line tangled around it? You can tilt up the drive, remove the prop nut, and look to see if the hub looks twisted or melted. It has a prop pitch of 24″, and the drive ration is 1:36:1. For the most part it was one ear that was off. Here’s a quick look at the evolution of prop hubs, the vital assembly that connects an engine’s propeller to its drive shaft and simultaneously acts as a shock absorber should a prop strike an underwater object. The thing about raw denim is that you're not supposed to wash it. It boils down to risk. Does your boat prop have a spun hub? This is a problem every boat owner should know how to fix and the good news is that it’s much easier to fix than you might think! Check out this video to learn how to quickly fix a spun hub. It wasn’t until my divorce that I decided I needed to spin yarn myself. You can’t go to infinity like that but a baseline prop will give you a range. It’s thinner than that. . Planes out great. Some non-woven materials lack sufficient . I have a stainless Prop for Mercury 25HP outboard that is spun. Or the impellor wears to the point that at higher RPM the rubber blades can not touch the sides of the pump and loses its pumping effect. This hub failed on a run back in from Astoria Canyon (55 miles out) and over the Columbia River bar. . Knowing I could no longer keep up the luxury of buying hand spun-yarn, I took a leap of faith that I’d actually learn how to spin yarn for myself and spent $400 on an Ashford Kiwi. . But, when RPM is increased, the engine revs with little or no boat acceleration because the prop begins to spin. 99. Boat had a spare prop that was 15x15, which after installed brought rpms closer to 5000. Many have been upgraded with electrical systems, but chances are if you’re considering a 65-HP engine, you’re fixin’ to start by hand the . #6. In addition to rehubbing, they can do things like add cup like I mentioned before (cup ads "lift" at the sacrifice of a little top end). When the motor is in forward gear i can turn the prop with my hand and the rubber in the hub area looks all ate up! The worst part is i never got off my butt and got a tiny tach so i have no idea which size to buy. So how to you replace a spun hub? If shaft and prop does not follow each other, the marks will tell after a swift test run. . Lower units can't "slip" as there is no true clutch. I was on river today & after a while it started to act as it was slipping. . You can prop out a boat with a fraction of your gas tank full. I did that to a Laser and Steve put it on the pitch block. . What to do in case it happens again? If it’s an emergency, you can come home in reverse, as the hub shears one way, and you may be lucky enough to be able to temporarily . If your boat does not move when you apply the throttle, or will only move slowly, you may have “spun the hub. Silk filament thread is made from long connected silk fibers, which are reeled from cocoons to produce a beautiful, flawless thread. The linkage seems fine, motor rpms up. I have never heard of a poppet valve in a propeller. posted 06-17-2008 09:30 PM ET (US) The rubber hub in a prop is a large solid hunk of rubber squeezed and forced into the hub under lots of pressure. If you think you are spinning your hub mark the hub and rubber and go for a run. A spun hub will usually still work at no-wake speeds. . The symptom of a spun prop is the engine running WOT and not going anywhere, yet when you idle it down, it will start moving a little. . But it sounds like your sugar is already set. Hopped in the boat and saw that, at full lock, the rudder control arm and steering cable connection almost form a straight line because the cable is able to retract that far. I was 16 and it was spun bad enough that I would start to get on plane then it would rev like it popped out of gear. The verticle driveshaft of a pre-Alpha, "R" or number one drive has a pin at the top. . For Dacron backing I recommend the RIO Fly Line Backing (link to Amazon) You can select either 20 lbs or 30 lbs. same thing. Basically it fit right on the grooves shaft, and the prop fits righ on top. Then, you finally feel empowered and stop taking this shit anymore. Right inside, if you can see, there is a little rubber piece right in here with my fingers on right here, there's a rubber piece on there and there's another, you know, metal part in there, but the prop is actually separate from that. Boat performance is equal parts power and propeller. To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. Depending on the way it is inspected and the certification it then receives, the tank must be checked again every five, seven or 12 years. Spun yarn may be made up of a single type of fiber or it may be made twisting different fibers together. Any ideas thanks Jeremy. Now the real world call, you want hole shot or top end. . Capt John Badger BARBARIAN Sportfishing . You can also score your mark using a file. Now with all that said, we can finally address the heat issue of the magnets! . The motor would run just fine and the propeller would spin just fine out of the water. Also you should know that the brass washer that was included does not fit the Prop. jrizo1. Like Robby said high torque and hitting objects are the usual suspects. I’m going to tell the truth even if that makes people feel uncomfortable. For safety reasons and to lessen the mechanical damage, in case of the speeding propeller hitting some hard flotsam or shallow rocks, the propeller blades are not directly and solidly attached to the rotating driving shaft but they are coupled via. Funny you are talking about this. I just didn't know if you need a specific "electric" classified prop for that purpose. You might feel this through the wheel or tiller, although hydraulic steering can mask this vibration. Just got a 212 captiva with 5. . ) I know I can test this by reinstalling the 21, putting a mark of paint on the propshaft and the prop, taking it out on the water, hitting the throttle, and seeing if the marks still line up afterwards. You should drive on a damaged prop as little as possible. You can come from dark places and you can come out . It's an 18 ft. Felt like the shaft was free spinning. Finally, says Jennings, reorder any spare parts you used right away, and those you now know you should carry—shear pins, shaft seals, saddle gasket, spare prop, etc. Get started now, and once you’ve entered your specifications, we’ll provide results based upon our . . That would require you to take the engine apart and inspect all the engine bearings to know for sure. How it works: You pay UPS postage to and from our shop in Edgecomb, Maine. Fit was good and worked well . . No prop cut outs. How to listen to podcasts: everything you need to know . You also have to measure and calculate the distance--in inches--that each full turn of the propeller moves the boat forward, a measurement call the propeller's "pitch. Edit: to see if you have RPM to play with, run your current prop at full throttle and note what your RPM. With the mark in place over the inner and outer hub, it's a simple matter to pull the prop and see if the mark has broken in two. Inspect the propeller first to determine if the hub has spun inside the propeller. on 2/3/18 at 1:32 pm. I have a stanless steel prop. Brought to you by Barnacle Bill's Marine Supply. Be aware that you can purchase the bushing separately or as a complete kit with the new nut, cotter pin and retaining ring. If it were mine I would fit another prop--any prop-- and fit a new impellor. PIVOTING. Secondly, it causes those vibrations which makes your ride less comfortable. Apollo AUS. And then there are times where a spare prop isn’t the solution. . . Significant damage can happen if fishing line is left around the propshaft for too long. Clean the prop internal area for left over rubber and clean the rubber hub with acetone as well as the prop several times. Those are very easy to see if they are in good shape. . . Spun propeller hub. Some believe it creates a flasher effect. Let's head back in time to the 1970s and see just how many last names you remember. If you try this, be careful drilling the central hole for the spinner / prop shaft as it can split after you have done all the work. Gave it throttle in the water and the motor would just Rev really high but no power to the propeller. . In many cases it's less expensive to have a hub rebuilt rather than buy a new prop. Jun 29, 2010. Keep in mind you can only rehub a prop twice. . The evolution of prop hubs. Actually, spun prop was a bad desription of the problem. Chuck . Felt like a spun hub: I would throttle up with sluggish response from the prop. However there are times when the exhaust runs too hot and overheats the hub. Old Price: $52. . . When you get a prop re-hubbed, directions will tell you to install the prop but let the engine idle for 15 to 20 minutes to allow the rubber to properly heat-and-seat. What are the signs of a spun prop hub? Once a hub is spun, there generally remains enough friction to operate at low RPM – sort of a “get home” mode. If the dots no longer line up, then the rubber hub is spinning in its bore. A problem with the prop and vibrations can ruin other components of the motor and overall damage the integrity of the rest of your vessel. Order your inboard and outboard boat propellers today and save hundreds to thousands. With the mark in place over the inner and outer hub, it's a simple matter to pull the prop and see if the mark has broken in two. To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. Assuming you use the same engine and boat for three different sports, a 13 x 21 prop might be ideal for general cruising, while a 13 x 23 would be more suitable for lightly loaded fishing trips . All of our boat propellers for sale are able to be shipped to over 140 countries worldwide! Singles, unfinished: 42 wraps per inch. If you seperate the upper from the lower then you can tell if the drive is an Alpha or a "R" drive. I know that this is a lot of numbers, but if you can follow along, you can clearly see how Voltage, Kv, RPM and Current all interact in a motor as the prop load changes. how do i find out what my prop on my kicker is pitched? my 15 horse eveinrude kicker has NO pushing power. The shoulder is too small. You can also score your mark using a file. The nose piece has a 1/16" cross hole to tighten, with a 5-40 stud to fit into the supplied union nut. It cavitated pretty bad while trying to get up on plane. . Then you can take the boat out and run it as you usually would. I can speak from experience about what is known as a “spun hub. . Talk to your prop man tell him what you are looking for, like 200 more R's, more lift. "Rebuilt" hub means a "new" hub. At WOT 4200RPM, rpm go up speed falls off. A rehubed prop is more likely to spin again. If the prop is alum toss it. You can't always tell from just looking at a prop if it is a lifting prop or not. This is because there is a 90 degree polarization mismatch between the light emitted from the monitor and the polarization filter in the sunglasses. . . Several pilots evidently believe that hand propping an aircraft is “safe” as you “know how”. How can you tell if you have spun a prop ? Volvo DPH 2007 (bronze/brass duo prop) Are there alignment marks on the prop and prop guts? Looking for a bad vibration Havent looked to see if I have water in the U-joint bellows yet. . i wish that they would lock in better (i am sure most of you have no problem with it but i never got the feel for locking them in) I started to take off and in a second the copter flips upside down will all of the lights blinking. I came across some large mats of hydrilla in the bayou last weekend on way back from hunting and tried to maneuver around, but ended up hitting a patch that spun my prop. 197 62 1. On both I go go 2000 RPMS max. We punch every prop we rehub in order to make it easier in the future to tell if . It wasn't constant, the effect would come and go but was very noticeable. You will know when the hub is in place when you can rotate the funnel with your hand. . Usually consisting of 3 or more blades, a boat prop spins around a central shaft to create dynamics similar to a rotating screw or airfoil. After I came out, I saw how loose my prop was. When done right pressing a new hub into the prop it actually stretches the hub of the prop. If you join, you can choose to either contribute and not see any advertising, or you can choose not to contribute, and you will see the same advertising you are seeing right now. I am now assuming that the detached prop was at the crash site and the crash is what caused it to detach. . The quickest way to check a bad hub is to try another propeller to see if it slips at the same rpm's or you can try putting a dab of paint on the hub and a dab on the prop and try it to see if the 2 marks still lineup after a trial run. In a crowded marina or narrow channel, it is sometimes necessary to turn 90 degrees or more with little room. Not all designs have this right thrust built-in, and you can reverse a brushless motor just by switching any two of the wires to the ESC, so it may not matter. In order to more easily diagnose hub problems, we recommend punching the hub BEFORE you think you have a spun hub. On a non-SDS Yamaha prop, the rubber core would give way and spin to protect the driveline (thus resulting in the so called "spun hub"). Spare your day: Getting stranded due to a damaged propeller or spun prop hub will ruin your day and threaten your safety. . If the rest of thread pulls back, it is filament. It's not worth the money to have new hub installed. . The Spitfire is 1/4 the cost of the SS and would be a cheap way to try out 4-blade and have a spare second prop. . If you have questions about cavitation or ventilation or need help with your propeller installation, contact us here or call the experts at Ace Propeller at 1-866-621-7767. Intense Vibrations from Underneath the Vehicle. Then remove the propeller and clean the rest of the line off. I have a Mercury Spitfire aluminum prop on there now until I can get the hub replaced. . . It’s easy to sneer at the words of Stairway to Heaven, and Plant is among those who have. 0 0. propshopinc. Be sure the new hub is pressed in as far as the old hub had been. 04-29-2021, 11:53 AM. Thanks!!!! deepwater. Here is a breakdown of how this happens, what damage can be . Boat propeller problems Posted. . Have your customer test the prop on his boat. . To do so, you'll need to open Word. #1. . This sentence in article: “So basically, if you can fasten the prop nuts clockwise, then you have a CW motor or prop shaft. . Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Price is $20 with $2 shipping". . Spun prop on Bigfoot 60hp . Come out of hole great. You can hammer a new rubber hub in? I was not aware of that - the only way I know how it's done is by being pressed in. Remember . crankshaft), however I can't recall any radial engined aircraft with a cannon firing thru the prop hub - or for that matter a radial engined aircraft with an indirectly driven prop. It’s a great idea to always carry a spare propeller and hub so you can turn the situation into a minor delay instead of a day spoiler. Always turn a boat with a right-hand propeller to starboard, rotating her clockwise. When I spin the prop manually I hear a little scraping sound not sure if that is normal is there a way to check if the prop shaft is bent? thank you in … The one time I had a spun prop, the boat could not get on plane. After a few minutes remove the propeller and examine your handiwork. i saw that a prop . With the mark in place over the inner and outer hub, it’s a simple matter to pull the prop and see if the mark has broken in two. You might feel this through the wheel or tiller, although hydraulic steering can mask this vibration. Spare your day: Getting stranded due to a damaged propeller or spun prop hub will ruin your day and threaten your safety. But taking it out under normal conditions will throw your propping calculations off kilt. jrizo1. Prop hubs have changed quite a bit over the years, but their . Fourth trip out the hub center spun free from the prop. . There was a smell of burnt rubber coming from the . Hitting something with the prop will do it too. They use "clutch dogs" that are simple two sets of "ears" that either engage or do not, but can not slip. If it has, you have spun a hub. After it came in the mail, I spent all of my prop-making money on hand-spun yarn. The impellor can suffer the same fate as a 'spun prop' Yes it may be keyed but the rubber comes away from the keyed inner bush. Put your wheel hard over to starboard (or push your tiller hard to port), then give the throttle a sharp 1- or 2-second burst of power in forward. Tried to go out to the MRGO Wall today but had boat problems. In other words, the propeller is no longer being turned by the engine because the hub has failed. It is specifically avoided in the correct design of props and that is why prop fabrication and prop repair must be relegated to the experts. Spun Yarn. That's what the prop is attached to. That is the best money that can be spend on boat set up. . • DO NOT USE PROPELLER FOR AT LEAST 24 HOURS . Often, a badly spun prop will be apparent with a visual inspection. Is my prop hub spun? Watch this short video to find out how to check. . Some Propeller Terms You Should Know Radius The radius is the distance from the center of the hub to the outer-most edge of the blade tip. . . You can also score your mark using a file. ) and then replace the old bushing. I know he repairs props, not,sure about prop hubs-if not he can direct you to someone. If you spun a bearing there is damage to the crank and that rod, at least. You may have slightly damaged the prop causing the cavitation. This can include the valves, the connecting rods, the pistons and even the cylinder head or engine block. I think it's best to pull the engine, replace everything that is needed, and know that it will last when you put it back in. Press the hub into the propeller. ”If you absolutely hated Stairway to Heaven, nobody can blame you for that because . See, with the hub, the prop is actually not all one unit. . To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. If you fit a prop backwards it still blows in the normal direction but you only get about half as much thrust. It all depends on how narrow or expanded the thrust cone is exiting the prop. 🎰 How much have you spun Country Girl? Last chance to prove it to Goldie! Can you tell the difference between these two? 👍 = Eyes ️ = Necklace 😆 = Hat Reel in 2,500,000 FREEBIES 👉 https://bit. A 60x50, 59x 51, 58x52,61x49,62x48 and so on will have about the same load on an engine. . . Propeller repair can be expensive, especially on hard-to-weld stainless steel. If you have, then you know what cavitation can do to a prop. You can also score your mark using a file. Apollo AUS. It was fun making my way back to riverbreeze at 2 mph. The propeller does not care a bit how it gets spun up. I'm coming in just under $1000 for the rebuilt long block (+ 120k parts), doing it right. 1. . The center hub is held inside the propeller by compression. Hold the pressure of the press against the hub . That's the . I dont know if you want to spend a couple hundred more for a flashy prop. They can also advise as to whether you might need a prop of a different diameter. Cavitation is bad for three reasons. You can also score your mark using a file. Ok, now you may have a case although I don't know how you will prove it. Newer style props have a plastic hub. Gel-Spun Poly is your choice when line capacity on your reel is limited and it’s common for fish to run more than 300 feet. If the bubbles aren’t very deep, you can melt away the sugar around them and get a smooth surface. ” A prop shop can usually replace a spun rubber hub. in minutes. Mercury props are designed to minimize ventilation. got back to the ramp put it gear and could spin the prop forward and backwards. . Using prop walk, you can actually pivot a boat in place, or nearly so. 3 mph at 4300 RPM. You don’t want to go back to the days of “thrusting” with the boathook. All right, so if you have a constant-speed propeller you're now going to have free power levers. But, that doesn’t have to happen. lightly, it's job is let the shaft spin when the prop stops on a object, so that the lower unit's gear don't take the blunt of the hit. with a v-6 and an omc outdrive-early 90s model. And, few prop shops can guarantee same-day service, especially in the heart of boating season. You can bring a spare prop and the tools to make the switch if the possibility exists. You can use fuel, electricity, or steam for that matter. . Cavitation if the formation of air bubbles on the propeller. Put the 15x17 back on and all is good (except back to low wot rpm). He owns Gainesville Radiator and A/C-his main business. The engine wants to scream and spped dies. You can suffer from discrimination, grief from lost loved ones, abuse from loved ones, losing your job, financial collapse, environmental toxins, and . Its like a shear pin, made to spin before you damage your prop shaft or lower unit. The "hub" is the center section of the prop, typically made of rubber, and is pressed into place. . If you have an older style prop with the rubber hub it is a little harder to tell, but remove the prop and see if it looks okay. Now check the marks and see if they line up. Depending how bad the rubber hub is, you can sometimes press it out. Propeller cavitation. As far as I can tell, unless the keyed washer or the keyway in the prop gives, the lower unit driveline internals are going to be next in line. When two or more fibers are joined together by twisting to get a strong yarn, the process is called spinning. If it has, you have spun a hub. To tell if your hub has spun, mark a line on the back of the prop hub with lipstick. Maybe I also understood terms in this article wrong :) If you are not sure a hub has spun - center punch the hub and the hub bore. SOLD - 2011 SouthBay 522CR w/115 4 Stroke Mercury. If you are using silk thread, you can tell if it is filament by pulling a small strand. Merely idling dockside may not flow enough torque to challenge the hub. 2-ply, unfinished: 27 wraps per inch. This actually happened a few weeks ago, but I hit an obstruction while on plane and knocked something loose. You could probably do the manual job on the front every 5-10 years and have pretty good life. A spun hub feels like a loss of power with excessive RPM. if the spare prop works well under load, the hub on #1 prop is bad, but if you get the same symptoms with the spare as you did with prop #1, you are probably going to find you have a drive coupler/damper issue, as these have the same symptoms as a spun prop hub. It’s a great idea to always carry a spare propeller and hub so you can turn the situation into a minor delay instead of a day spoiler. 5 Sportwin. Run the engine under load. A wider thrust cone will expend some of the power pushing water backwards and also down and to the sides as well as up (more spray in the rooster tail). If it has, you have spun a hub. These are fit together as a set. ***** Chris Kaiser ***** "When you're fresh out of lawyers You don't know how good it's gonna feel" - Al Stewart, 1988 . Cavitaion usually occurs as a result of damage and you'll feel it in the form of vibrations. It is a brittle plastic and must be handled with care to get the disk, but it isn't too darn difficult. I have not used it yet, but so far so good. So you can’t just slap on another prop and go. Gel Spun Poly does cost a little more on average a spool of 100 yards will be about $10 more than Dacron. No sign of anything. USUALLY, you can idle back in to port with a spun prop, you just can not get up any speed. The term is used in the textile manufacturing industry to denote fabrics, such as felt, which are neither woven nor knitted. yeah, if youre motor RPM stays the same and your MPH changes, you have a spun prop. Now that you know what prop walk is, what it does, and which way it’s going to turn your boat, you’re ready to put the effect to work for you. To understand the problem, let’s first define some terms. . 3-py, unfinished: 17 wraps per inch. I have never removed the prop and don't know much about it or replacing the hub. April 18, 2016 at 5:05 am #34987. New Price: $48. Given enough use, that pitting will only get deeper and you will end up having to replace the prop. . A new one is pressed in, carefully. Call Prop Dave in Gainesville Ga-an old boat collector, Merc Mechanic and prop guy. . Your engine manual will tell you what your wide open throttle RPM range should be. You can try the blow torch, anyway. by RoosterCogburn585. I just didn't know for sure if there was something I didn't know. Using prop walk, you can pivot a boat in place, or nearly so. Something every single-screw boat skipper has at the back of his mind. A good prop shop can repair minor blade damage. Also remove the propeller and see if you see any scaring on the back side. If you happen to hit something with the prop. I also have a trolling motor and/or push pole to get me back. In other words, the propeller is being rebuilt with a new hub. If you are having a cavitation blowout during the hole shot, check to see if your prop has blow holes that take the plug inserts. Before I went to the Flo Torque I spun 2. Loosen the nut that hold the prop in place, remove the bushing (you may have to use a chisel to cut the bushing and then force it out of the center of the prop. Sometimes the vibration gets so severe, it can ruin the prop shaft bearing and could force replacement of the whole lower unit. You'll want to wait to "officially" wash your jeans — ideally anywhere from 4–12 months. It's inside Editor where you can tell Word how many spaces should go after a period. I'm hoping iBoats will take it back. That has been the case with all 3 props that I have bought from your company. Happened today. Tweet. If they don't you have a spun hub. Shop, read reviews, or ask questions about TURNING POINT PROPELLERS 500 Series Hub System, Volvo 504 at the official West Marine online store. The condition you described sounds like a spun prop. The rev limiter setting isn't as important to know it's the RPM range of your engine that you need to know about. If we can't repair the prop, we will let you know promptly and give you the option of having the propeller shipped back to you or disposing it for . If you can check runout on it while slowly turning prop by hand, it may be the source of your remaining hi rpm vibes. . Home /. Vibrations problems . . Run the propeller for about two minutes and then shut it off. First it can physically damage the propeller. You should be able to tell if the prop slips at the hub. New hub in old prop -- same thing. . The splines on the shaft keep the thrust washer from slipping, so if the propeller has a spun hub it will become scratched as it rotates in relation to the thrust washer. The Mercury Prop Selector suggests the 17p Revolution 4 (stainless steel) It also suggests the 17p Spitfire (aluminum). . in 5 steps or less. Then use super glue to reset the hub, by repressing the hub back in. . 99. Life can be so oppressive that people don’t come back. Most of the time it’s really hard to grow into an adult. You can take a permanent marker and mark the prop and hub. When looking for a prop you need to know the specs on the current prop (stamped on hub between blades and/or on hub end). I am thinking clutch is going. A boat propeller is a fan mechanism that transmits power by converting rotational motion into thrust. Try this, with your boat on the trailer and key off, put your motor into forward gear. Too much lift kills speed Rooster tails higher than the cowl of the motors is making air bubbles not speed. Pein a dot on the metal splined hub and adjacent on the mating surface of the propeller proper. But if you agree with me, could you please offer some suggestions on how to talk to my dealer so as to get some results. When spun, the prop causes air to move, and that action results in a reaction, which is thrust for the aircraft. We give you quality service with a reasonable turn-around time so that you can save hundreds dollars, depending on the prop. Spun aluminum cone with a turned backplate from 6061- T-6 alloy. Take a center punch and a hammer and put a punch mark on the hub and on the prop so they line up. “You know when you start out with a bent shaft or a problem with the driveline, you can’t align anything properly,” says Dave LaCombe, yard manager at American Custom Yacht. Can you tell fake news when you see it? A study published in the journal Cognitive Research measured how often people can tell a photo has been doctored. i never really got the hang of putting the props on. Blended yarn is a result of spinning together of different kinds of fibers such as cotton polyester or wool acrylic yarn. For rope, simply unwind it from the propeller or cut it off. Jim Hogan 360-909-9912 I’m assuming you are talking about pilot controlling thrust and pitch. You could have a “spun” propeller hub. ly/ 3y6tEbY . Purchased this prop in May of this year for my '71 9. If your boat motor is running and in gear, but your prop isn’t spinning, then you might have a spun hub. I have never had one slip a little. I'm betting the prop was spun prior to my purchasing it. If you’ve ever worn these sunglasses while looking at an LCD screen you’ll know that if you turn your head in certain orientations the monitor will go totally dark. . Im guessing i finally spun the hub on my prop today. See the picture below of the Beech King Air throttle quadrant. Over time, these can become brittle and break and fall out. A good prop shop can repair minor blade damage. SOLD - 2009 20' Bentley w/4 Stroke 90hp Mercury. I was assuming the undamaged prop was the one that detached in flight and the others were damaged in the crash but you state that the detached prop was the most damaged. With the mark in place over the inner and outer hub, it's a simple matter to pull the prop and see if the mark has broken in two. stainless wont be as important where you wont likely strike bottom but it will also create some flash as it turns. Many boaters opt to carry a basic aluminum propeller as a spare to save money. Props have what is called a "hub", a vulcanized rubber connecting the machined splined inner hub, to the prop itself. A spare outboard prop or, for some makes of outboard, a prop insert, can quickly solve this problem. Don't know how it got so loose! . . . You're likely better of pulling the front shaft so you can pull it apart, clean the slip section and manually grease it, that way you know you don't overload the bearing (but do mark that shaft so it goes back together exactly as it was). (unfortunately it's not a mariah). (Note to self: From now on, just buy the new one and be done with it. . You have a lot more diameter. The hub of a propeller is within the barrel, which is the cylinder that supports the prop blades. . Sep 4, 2019 - Explore The Prop Shop's board "Outboard Propellers" on Pinterest. When you look at the prop, if the punches do not line up anymore, your hub is spun. While the hole shot was fine for regular boating was a little lacking for skiing. Please visit us at https://www. Pure silk fabrics are made from either silk filament or spun silk – or a . The amount of damage can “total” your engine, and possibly your entire car. Once there, you could then steer it into the prop by turning the now stiff wheel back to the left. . Or perhaps it was mentioned all the time, and you just don't remember it. You can also score your mark using a file. If not, can you create clear plastic disks for the spinning props ? I made some for my 1/72 C-119 from CD cases. You can still operate the outboard at low rpm and slowly move the boat but when you apply throttle the prop will begin to spin on the hub. Sometimes the hub will slip inside of the propeller at higher rpm's. That or a spec of dirt under pulley. ” I change my motor-nut setup according to this sentence and during 1 minute of hovering 2 nuts drop to the earth. Inspect the two marks to see if they are still lined up across from each other. When in neutral (out of the water), the prop will spin quite fast - at least like when you would put the engine into gear at an idle speed. Can't comment on the newer ones. . . Kick it like you're trying ti kill a mugger. You'll need a socket (a 1 1/16th-inch nut is the most common size on mid-size to V6 motors) and a screwdriver to do this job. I draw the line when a non-pilot is allowed to walk into a moving prop. I know that using an electric prop on a fuel engine will result in destruction of that prop, and I did plan on using normal "fuel" driven props for my electric purposes. When you spin a prop hub, the engine does not drop in RPM. I figured that would be a good way to keep overhead cost down. The Alpha One does not have any sort of clutch, so no issues in that. On a larger engine prop, there a plastic hub that links the shaft to the prop. This leaves you off the water. Then you can take the boat out and run it as you usually would. . the Internet say's to fix it by: "Prop shop techs use a hydraulic ram and many tons of pressure to unceremoniously press the bad hub out of of its bore. . I was spinning for myself to make props. Pull the cone off the front of the propeller, using the pliers. You can also score your mark using a file. " With a few simple tools, some addition and some multiplication, you can accurately measure your propeller. The assembly weighs just under a quarter of an ounce. The #1 trusted brand since 1956, know that you are in good hands with a company that is focused on creating high quality products. You should cut the fishing line from the propeller until you get home. 0L and alpha one drive. Vibration can be generated through a misaligned engine pulley as well. . Put the shifter in forward, turn the prop backward till it stops, then stand back and KICK IT HARD in the same direction. . 7. Always turn a boat with a right-hand propeller to starboard, rotating her clockwise. . When you slow down quickly your engines rpms slow, but the boat/prop takes longer to . Yesterday,after running about 15 minutes and at about 3/4 throttle,the engine began over-reving and the boat quit going!Basically my thoughts were a spun prop. Yes, it sounds like you spun the hub. Now you'll want to remove the propeller. "Much effort" are the key words here. . . . Does your boat prop have a spun hub?This is a problem every boat owner should know how to fix and the good news is that it's much easier to fix than you migh. How do I know if my prop is slipping? If you are not sure if your hub is spun, there is an easy way to test. . Thanks guys. You'll need a socket (a 1 1/16th-inch nut is the most common size on mid-size to V6 motors) and a screwdriver to do this job. But I've never had an engine where the prop spins as fast it does with this one. 1) When the sugar is still melted, you can run the low flame of a blow torch lightly over the bubbles on the surface. . If you can't find anyone local, you can send it to General Propeller in Bradenton, FL. Prop shops can use a machine to tell how far out of specification your prop might be and repair it like new. . Diameter and pitch are interrelated, and sometimes getting the right prop for the best efficiency is as much art as science and might require trying . When presented randomly selected photos . Mark the front of the propeller and the propeller hub directly across from each other with a permanent marker. Honda (115-225HP, 75-90HP) 15 Tooth Spline. I guess, if the risk is perceived to be acceptable, it is. He has been to,a,fee of our FC meet on lake Lanier since he owns several FCs among other vintage boats. You can detect a spun hub just by looking for circular scratches on the portion of the hub that bears against the thrust washer. With the mark in place over the inner and outer hub, it's a simple matter to pull the prop and see if the mark has broken in two. The 35hp props are supposed to hold 165 ft lbs according to the chart. . The hub is a piece of plastic designed to break if you hit something with your prop—it’s a safety feature so that none of the more expensive parts break. I have a 2015 150 ho 20 p Raker prop 18' Tracker Tundra. Extremely common. “So we sent out the shafts—one of them was pretty bad when we got the report back from Lauderdale Prop, it was close to 30 thousandths out—and we refit and . If you wear your jeans everyday . At least the older (1995) 2-strokes like mine. . Nicholette from Spun Sugar Yarns Can you tell us about how you got started spinning and dyeing yarn? When I started spinning, I never thought I’d actually sell my yarn. Now you'll want to remove the propeller. If you’re in the Florida Keys and […] . . Life can throw a bunch of curveballs at you. Depending on your car’s remaining value, you may consider a replacement engine. Another prop question. With our propeller finder, you’ll be able to narrow your search for the most ideal prop considerably in just four simple steps. But, I've read that aluminum props aren't best for high hp engines. . Get maybe 5 hours on this used prop and hub is spun. See more ideas about outboard, boat propellers, quicksilver. New prop with new hub. Gearcase Size: 4-1/4 inch and 4-3/4 inch. If the (2) two center punch marks have moved, the hub is bad. . Seems like spun hub on volvo penta. (We'll use the Microsoft Word for Microsoft 365 app first. . Nonwoven fabric is a fabric -like material made from staple fibre (short) and long fibres (continuous long), bonded together by chemical, mechanical, heat or solvent treatment. There are several things that can go wrong between the engine and the propeller. How do you know if your prop is slipping? Inspect the propeller first to determine if the hub has spun inside the propeller. I CAN stop the prop and it doesn't take much force (I used a piece of wood and slowly went "with the rotation" of the prop). Incidentally, the writing on the prop usually goes on the front. . rpms can be screaming and the boat goes maybe 3knots, at slack tide, this prop sucks a$$! . This means boaters with a "spun" hub can creep along at less than a walking pace, but no faster. You can see from this that if you have a constant-speed propeller, the efficiency across a huge range of speeds is roughly constant, whereas if you have a climb prop or a cruise prop it's only working optimally at certain airspeeds. I can't remember if a 200 on a 201 will run a 24" or if it takes a 22" but either way, something is off. . . Ah, yes, the lyrics.