Broken cavitation plate He backed right Jan 3, 2014 · Guys, Is it possible to fix the cavition plate once its been broken? What have you guys done n the past that was durable enough. Each plate is notched to fit the motor it will be installed on. Les plaques de cavitation, également appelées plaques anti-ventilation, aident à empêcher l'air d'être aspiré dans l'hélice, ce qui peut entraîner une perte de poussée et d'efficacité. So I made a new plate and then took it to a welding shop for them to professionally weld it back on. I don't think the holeshot will matter if there is a cavitation plate on or not. Came off a blown up 250 SHO, has a broken cavitation plate. I had it welded up and it broke again within a few weeks. If your boat is sluggish on the water, installing a cavitation plate may improve its performance. GEARCASE - BROKEN CAVITATION PLATE. Some piece of wood (most likely) caught the prop and was pushed up into the left side of my cavitation plate, breaking off a very large piece. It is not expensive for my customers. Many Evinrude model in the 60hp, 70hp, 90hp, 115hp range. And personally I wouldn't use it that way. Didn't hear or notice anything. rmcderm313 Regular Contributor. Do cavitation plates really work? Cavitation plates are often thought to be a necessary component on boats, but do they actually do anything? The short answer is: it depends. JON242. Apr 4, 2003 · Ah, broken cavitation plate - point taken! I'll leave well alone I think Thanks all. These were both 15 1/ Jul 1, 2012 · The cavitation plate, or more correctly anti-cavitation plate, is a full-wrap device that is secured completely around the anti-ventilation fin, extending both forward and trailing behind the outboard's midsection. He said it needed to be re-worked. Oct 3, 2021 · Well this part has been busted for 4 years now. Cavitation is the creation of vapor on the prop blades by damaged or Mar 17, 2003 · While running down the Willamette this Saturday, I hit a submerged log going about 35 mph. the Cavitation plate has no scratches or gouges out of it it looks bran spanking new other than the broken piece. Picked up the boat used with the cavitation PART NUMBER 5036614 - 05036614. Sep 30, 2022 · Didn't hit anything, and you can see prior damage to the rear of the plate where it is bent down slightly and there are stress cracks in the paint. 07-16-2003, 03:32 PM. Broken cavitation plate and bent prop Well, running up the intracoastal (at an extremely low tide) I apparently hit something metal, bent a blade on my prop and flung it hard enough into the cavitation plate to break off a 9" x 4" chunk of metal. That's why I hate to see people run them. FlyBoyMark Ensign. Our Cavitation Plates come with the cavity needed to fit the lower unit trim tab. I was looking at those plates (i. I hated the way the boat ran without it. Previous owner looks to have drilled holes for a doel-fin. Start by giving your cavitation plate a thorough visual inspection. Replacing a lower unit housing is $$$. One day while out on the water, my cav. You can see on the bottome of the plate where the blade has barely come into contact with it. I ran the boat with it in that condition a few times and couldn't tell a difference. Currently, the boat has a hydrofoil on it, presumably to "replace" the cavitation plate and aid in ventilation. Good for one who can weld/repair… Last pressure tested good for 3 days at 6psi. They are ready to heliarc in place. 07-26-2005 11:39 AM. PLATE REPAIR The skeg is the fin located on the bottom of your outboard or sterndrives lower unit. Jun 8, 2020 · Ran through some debris due to other boats blocking me from being able to avoid it. In short, they’re designed to address the exact processes that lead to either issue but shouldn’t be considered magic pills since they can’t address all the potential The result can be a vibration, broken cavitation plate, lost gearcase, or worse. The cavitation plate doesn't help with water flow into the water pump intake. Prop position varies widely between outboards. The Skeg of an outboard or sterndrive provides much directional stability and The cav-plate wo "Hi there! The cav-plate would not be there if it was not deemed neccessary Manufacturers want to save cash You'll notice that the boat will not plane properly and also have some prop-slip (read: cavitation) when throttling up. A broken or damaged Skeg adversely affects handling. They can answer questions for any Yamaha outboard model or horsepower. It's an I noticed about a year ago that the cavitation plate had cracked right through, and basically broken off. I have no idea how this happend. It had a hydrofoil on it and still has the forward holes in Mar 12, 2004 · Broken cavitation plate. 936 Views 4 Replies 3 Participants Last post by fish_on, May 2, 2003 Jump to Latest fish_on Discussion starter Jan 3, 2012 · Some how a chunk on the side of my cavitation plate got knocked off while I was in Arkansas. Cavitation plates enhance a boat’s bow reaction while also controlling the engine. Mar 12, 2007 · A plate that is too close to the blade tip can induce cavitation and vibration. No better time to fix it than when you have it all apart. Nov 17, 2013 #1 Hi All, Aug 27, 2022 · The cavitation plate helps to prevent this by creating turbulence on the surface of the liquid, which dissipates the bubbles before they have a chance to collapse. 7/alphas. Jun 8, 2010 · Re: Cracked Cavitation Plate - What to do? See that little round spot dead center of the plate. I have a picture but Im not savvy with putting them online. It is Aluminum so it requires someone who can fabricate and weld a piece in place. This could be very dangerous so have it professionally repaired Mar 15, 2014 · This is a 2020 Yamaha 300 that has a damaged cavitation plate. My boating terminology is very limited so consider me a newbie at this sort of stuff. Jul 26, 2011 · Re: Broken cavitation plate - JB Weld/Marine Tex? If the boat is handling and trimming OK, And if there are no big cracks, I wouldn't worry about it too much right now, but in the off season it would probably be a good idea to take the lower off, have a piece of aluminum welded in, and the holes filled. Or is it a wrap and I should just buy another lower unit. Broken piece is taped to the skeg. Mar 1, 2018 · Thanks for the tip about Skeg Depot. I do this type of repair here. Can I just cut off the rest of the cavitation plate or do I really need to weld the broken section back on? Aug 11, 2024 · When it comes to designing a cavitation plate, there are several factors to consider to ensure optimal performance. Smart tabs are a much better solution. fiddlebick New member. Bought a new plate from prodrive and hunted this morning and cavitation plate broke again. The bolts do not go through the lower unit. Hit a log! The cavitation on the left side on one drive is gone. Thread starter fiddlebick; Start date Oct 26, 2020; F. Aug 5, 2008 · This weekend one of my cavitation plates broke. I have a broken cavitation plate on my F225 yamaha. Do I really need to repair this? Is the plate really necessary on this twin engine boat? It gets up on plane fine. I had a skeg wielded back on for $50. * On the Boat skeg/cavitation plate repairs are done by appointment only. I still have the piece, intact. The plate is to prevent ventilation, sucking air as you describe, not cavitation. . Recently aquired on a newer boat. As a general rule, you want your motor cavitation plate to be slightly (1 inch) above the bottom of your boat transom. MerCruiser Replacement Anti-Cavitation Plates Click Here For Prices . Addressing these issues early will save you from larger problems down the line. If too much of the anti-cavitation plate is missing, you will have to weld one on. Look for any signs of wear, cracks, or a broken cavitation plate. A blade can pick up a board or such and it gets wedged between the top of the upward moving blade and the bottom of the anti-ventilation plate. Broken cavitation plate. The boat seemed to handle and plane like normal. I had a similar issue with a broken cavitation plate missing on one side of my OB. May 1, 2018 #1 Hello. May 11, 2003 · Cavitation Plate and Blade Flex= broken prop. 1K views 11 replies 10 participants last post by bornlucky Jan 11, 2018 General Boating Discussion - Cavitation Plate and Blade Flex= broken prop - I'm having a little problem. Anyone else having issues with the cavitation plate cracking. The mechanic told me they could pull it apart and send the casing out to be welded and painted for around $500. Two questions: 1. branko1 New member. Mar 18, 2013 · I've got a 21 Majek RFL. I have had saltwater corrosion issues with it before, the lower gear housing cracked in 2 different spots, but were successfully welded. What's an approximate cost to have this welding on? 557681 We specialize in repairing damaged cavitation plates and damaged or broken skeg for a fraction of the replacement cost. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. I look at my cavitation plates going 40KMPH and theres a lot of water passing by. Had it out twice since after taking the port side hydrofoil off and it seems to run fine. Joined Mar 11, 2004 Messages 4. Mar 7, 2004 · Re: BROKEN CAVITATION PLATE Had the same problem that you have as a result of the fin mounted to the outdrive. Mar 12, 2004 #1 Hi everyone, Mark Mar 21, 2010 · repair the broken cavitation plate. Jan 30, 2006 · The motor is a 1988 115 Yamaha. A well-designed cavitation plate can make all the difference in achieving efficient propulsion, while a poorly designed one can lead to reduced performance and increased maintenance costs. e. Regularly inspecting and cleaning your cavitation plate will help prevent future damage and ensure optimal performance. I cant imagine that with that much metal missing your prop is performing as it should. If this makes sense? Jul 21, 2016 · Broken cavitation plate repair. Certain fins force you to mount very close to the rear edge of the plateand pressure, or weight applied to it causes it to break. And yes, with that much HP you can easily crack the plate with a whale tale. At Tennessee Propeller, we use OEM Skeg parts from Mercury, Yamaha, Suzuki and Johnson/Evinrude to repair your lower unit. 1K views 2 replies 2 participants last post by outdoorsman al Jun 5, 2016 Jun 30, 2022 · The sooner it is found, the faster it can be corrected. Feb 20, 2019 · At the adapter plate (and cleaning out the sump) you're over 10 hours, so while it sounds a bit high, I'm not sure that it's it's an unrealistic time. 壊れたキャビテーションプレートを修理し、ボートの性能を回復するための正確な手順について知りたいですか? 詳しくは An anti-ventilation plate keeps air from being sucked by the prop, while an anti-cavitation plate deters the low-pressure areas that form because of the prop’s action. Sometimes they get caught on the ladder. I've experienced no loss of performance, and it seems to get up on plane just fine as well as make easy turns at all speeds. Propeller Shape and Angle Weld repair of a broken cavitation plate. 6. The Feb 11, 2007 · 1989 Sea Ray 30' with twin Mercruiser alpha 1 outdrives. Thanks, Jay Broken cavitation plate or skeg? Tired of other shops having your stuff forever? We got you!! #steelgodindustriesllc #thesteelgod Sep 15, 2010 · Broken anti cavitation plate 09-15-2010, 06:10 PM. Dec 3, 2004 · Re: How to Repair Cavitaion Plate Ron there is no other damage other than some small scratches on the outer blades where the motor scraped bottom as we beached shored the boat. Broken Cavitation Plate. A corner of the plate was broken off (& lost), making it necessary to form a piece approx. A cavitation plate may be advantageous if your boat is sluggish on the water. For a good (usefull) system you will need the plates, mounting blocks to mount the plates to the transom (or recess the bottom of the boat for the plates), turnbuckles, cross bars to tie all the turnbuckles together, the control rods that go through the Apr 15, 2002 · I have a 81 40 hp merc that I recently purchased, the motor has the front corner of the cavitation plate missing, ( I have it, I just have to get it welded back on) anyway, I used the boat for the first time last weekend and it ran great but had a hard time getting up on plane, it is on a 15 Jun 19, 2003 · I have a 115 Yamaha with which the corner of the cavitation plate has broken off. That is why the correct term for it is the anti-ventilation plate. Apr 18, 2009 · That whachamacallit is known as a cavitation plate and it should be repaired. $650 obo If you want prop then it’s $700. Apr 3, 2008 · 2005 merc optimax with standard lower end. The plate reduces tip recirculation as the blade passes and tip pressure is reduced causing momentary cavitation. plate off, because I had broken one before due to loose bolts. The boat was new to me so I had the insurance cover it and replace the lower unit casing ($1,700 ouch). Mar 12, 2004 · Re: Broken cavitation plate Hi Adam, If you he piece that was broken off it can be TIG wielded back on. Theres alot more to it than just a couple plates. Thanks for the replies, Sean Jul 2, 2014 · Cavitation Plate Yes it sure sounds like a broken cavitation plate (That is what he one directly over the propeller is called) This is likely going to be a problem for you when you accellerate. He said there was no way to make a piece that was exact & looked good. Possibly prior owner backed the motor into something and added the hydrofoil to make up for damage. Fortunately the damage is on an outside corner, furthest fron the output shaft and internal passages/seals. Easy to The cavitation plate on my Yamaha outboard (OX66)was damaged on one side last season. Customizable Fit: Notched to accommodate your specific motor size. I've broken 2 props now and it's due to the blades flexing and barely grazing the cavitation plates. I assume that the hydrfoil is probably putting a far amount of flex on the plate and the weld wasnt strong enough. And I have good personal experience with a Doelfin on an outboard and an I/O. Apr 4, 2003 #6 Jul 20, 2009 · Mercruiser 4. Follow the links below for the items I used in this Apr 1, 2023 · Ours are the STRONGEST and most LABOR SAVING and TIME SAVING “Replacement “ Skegs and Cavitation Plates available. At some point hit something with the prop that got forced into the cavitation plate on the lower unit and broke off a 4" x 3" section. Fall and winter are the perfect time to get your Skeg and Cavitation plate repaired. Broken Cavitation Plate Broke. I started having a heck of a time getting on plane and when I went looking, I found that one whole side of the plate on one drive was gone. Nov 23, 2014 · Hello guys, I need some help. My problem now is the most of the cavitation plate has broken off. The damaged portions of the skeg or cavitation plate are removed and jagged edges are ground smooth and beveled in order to hold the welding metal. Jan 3, 2012 · Some how a chunk on the side of my cavitation plate got knocked off while I was in Arkansas. Does anyone I have a 2007 Suzuki DF 225 that recently showed water in oilI had just had a broken cavitation plate rewelded, and built up a bit to thicken it. How can this be repaired? Do I have to replace the foot? Can i just replace the foot cover? Or can it be fixed by a repair shop. The lower unit must be pulled in order to do these repairs. May 9, 2008 · The blades on the left hand side of a right hand rotation prop are moving upward. Sounds like your dealer is on top of it for you. Any ideas on the best way to repair and I do not have the broken piece. Bought a replacement and don’t need this anymore. So the lower unit will remain submerged. That plate keeps the water above the prop from blowing upward with the pressure the propeller creates. When a cavitation plate is attached to a boat, it works as a planing surface, enhancing the boat’s ascent to the surface. Because of this, the Skeg and upper cavitation plate are susceptible to damage and can even be Now let me tell you about the cavitation plate with the least amount of drawbacks. Something has to give and it is usually the aft left hand portion of the plate. Joined Apr 14, 2002 Messages 934. it is cast into the lower unit and is designed to help protect your propeller if or when impact damage occurs. These are pre-shaped unpolished replacement aluminum alloy anti-cavitation plates. Dec 26, 2013 · Re: Planing attachment on cavitation plate - are trim planes better A hydofoil like the doelfin, usually work well. As suggested by this forum, I found a prop shop that can repair it. Note:Any damage to the Forward (bow-ward) half of the cavitation plate cannot be done on the boat. We have Skegs for-Chrysler Force, Evinrude / Johnson, Honda, Late model Force, Mercury / Mariner, Mercruiser, OMC, Suzuki, and Yamaha. May 3, 2020 · Anti-Cavitation Plate Repair/Weld Jump to Latest 10K views 7 replies 5 participants last post by CurDog May 10, 2020 Secure Mounting: 2-piece plate design mounts securely without drilling holes in the motor ‘s cavitation plate. I hope one of you can advise me on repairing the aluminum anti-cavitation plate on a outboard boat motor. Additionally, the lack of thrust that comes with cavitation makes a boat less responsive. I'm assuming a stick or something got into the prop at the right time. Sep 9, 2004 · General Q & A - Broken Cavitation Plate - I hit a piece of wood last weekend and broke about a 4" piece off both the upper and lower cavitation plate at the front port side. Vibrates on turns and lost power on startup (suspect it's cavitating). Customer: a piece of cavitation plate on 2016 Mercruiser 250hp sterndrive (I THINK it's an Alpha) has broken off. That makes the pressure go behind the boat and causes forward thrust. You do not want your motor cavitation plate dragging in the water, this may cause spraying, drag, and RPMs lost if the motor is too low. While we have a lot of shops around here that do routine skeg repair, I don't know of any that would do an anti-ventilation plate. The damage is done. The water test seemed to go fine and did not feel any issues. The main drive housing is fine and the chunk broke clean. Broken Cavitation Plate - Recommendations? Thread starter rmcderm313; Start date Nov 17, 2013; R. Thread starter branko1; Start date May 1, 2018; B. 3L with Alpha drive. He will have to find a used lower unit & cut off the piece that he needs. 09-09 James Propeller and Parts can repair the skeg and cavitation plate portions of your lower unit on both outboard and inboard/outboard engines. Cavitation plates give boats a better bow response when trimming the motor. aboynton Recruit. The whale tail is not a full-wrap, designed to be installed on the anti-ventilation plate, extending only behind the midsection. If your prop, skeg, or anti-cavitation plates become damaged, please DO NOT use JB Weld or similar materials to attempt your own fix. Any help is greatly appreciated. Part Numbers Jun 2, 2016 · Broken anti cavitation plate Jump to Latest 2. Wondering if that welding could have heated the drive shaft up enough to damage the seal where shaft enters the motor, and if so, IS there water behind that shaft that could be getting drawn in? Mar 15, 2010 · I have a 1980 Tecumseh 5hp Gamefisher with a broken cavitation plate. Cavitation is a process, or an occurrence, and difficult to see while it is happening. May 27, 2016 · I walked out in my garage today and notice that one side of my cavitation plate is completely broken off. I was thinking of pruchasing a Hydrofoil. Oui, une plaque de cavitation est nécessaire pour améliorer les performances et la maniabilité d'un bateau. NEW BRP EVINRUDE 60-115HP LOWER UNIT. So I took the cav. Now the other issue was my prop. Versatile Design: 4 styles/sizes available for most boat and motor combinations. I know I could weld new pieces in there and paint the drives but I was wondering if I Aug 10, 2009 · Re: Broken anti-cavitation plate fix I have the same problem. When mounted on your boat, the cavitation plate will act as a planing surface, and your boat will get on top faster. Hydrofoil) that bolt on to the lower end to get up on the plane quicker as a less expdnsive fix - not sure if they work though - looking for ideas that don;t hit my bank account to hard. I''ve gotten an estimate for a "messy" weld repair of $700 and a replacement cost of $1,400 (parts & labor) for a new gear housing. but case is intact and holding oil should be fine has bullet shaped nose with low water pickup will fit 200, 225, 250, and 300 Yamaha Jul 21, 2008 · The gear case has been damaged before (evidence of welding), as well as a broken cavitation plate (covered with a hydrofoil/stabilizer) Unit will only go into reverse (shift shaft will only rotate ~90* CCW), The splines in the drive shaft housing that the drive shaft mates with turn with the engine Jul 25, 2013 · Re: Cracked cavitation plate I hit a submerged log last summer and snapped of about 8" of the cavitation plate on the left side. 1. Can this be welded/repaired? If no, it appears as if the cavitation plate is attached to the mid section, is this true? if true, what am I looking at for a repair cost? will it hurt to run it this way? Dec 29, 2017 · Cavitation Plate??? Jump to Latest 4. When searching for cavitation, the most obvious thing to look for is the physical damage to the blade. Apr 8, 2006 · Re: broken cavitation plate Trivial seeming differences, Mark, but very important, nevertheless. Hello, 1996Rinker 280 - twin merc. This makes it more difficult and more time consuming for us to be able to fix it, making it more expensive for you. SDMike. Marina mechanic is telling me it can be repaired by welding a new piece on as opposed to replacing entire lower unit. Now most of the low pressure water is at the leading edge of the prop. This Speedmaster Fastener Kit for the Mercury Racing Super Speedmaster SSM #4 or #6 (Studs-Down) Kit; includes all-new stainless Nyloc nuts, OEM spec thick washers in stainless, and the stainless bolt required to swap out your existing hardware. Fit the replacement anti-cavitation plate to your damaged lower unit by using a sabre saw and then grinding the rest until they match. Whether caused by running aground or due to some land-bound calamity, a damaged or broken skeg or cavitation plate adversely affects handling and performance. SKEG & CAV. Its a small shop, so I have to remove the lower unit myself I think your having a hard time understanding the cost of a good (usefull) plate system. Last week when we pulled the boat out of the water I noticed that a piece of the anti-cavitation plate was broken off (see pics). The original on the boat cracked and tried to doing the cheapo in weld trick with no luck. Sep 21, 2017 · Hello, I mentioned in another thread about getting a new propeller, but some people have recommended that I take a look at my captivation plate. There you have a good amount of cavitation plate remaining. It broke about a 5 inch piece off of the left side of the cavitation plate which is the triangular shaped "fin" just above the prop. We ran over a log today which took a piece out of the anti-cavitation plate. I spoke with a mechanic about having it welded aluminum but he suggested that it will not me in best interest to do so. I have seen several repairs done to cavitation plates and if a good person does the repiar you can't even tell afterwards. They say that they would have to fab the part and that would cost a lot of money. Oct 25, 2024 · How To Find The Best Cavitation Plates For You. It doesn't look too bad. Oct 26, 2020 #1 Hit a log and broke not Broken cavitation plate. General Q & A. F. Sent from my iPhone using Tapatalk I am looking at purchasing a boat with a broken cavitation plate (2004 Johnson 140 4-stroke w/ power steering). I hit a submerged log and it broke off a piece of the cavitation plate on the front side of the motor. It was only held on by the hydrofoil bolt. The anti-cav plate prevents air from being sucked into the prop's wash. The other side has a crack that is almost identical to the broken one. Is there a cheaper method than welding it back on that would be sufficient if I have a hydrofoil/stabilizing fin connected to it? Jun 6, 2008 · I''ve been looking a boat that has a broken anti-ventilation plate (about 1/3 of one side is off and the big "washer" is bent). Sep 16, 2009 · In reverse It's gotta be sucking air. After some issues with trying to braze aluminum, I resort to a different method of attaching the missing side of the cavitation plate on this 1975 Evinrude 4 May 1, 2003 · Broken cavitation plate. Some have directed me to take it to a shop and get it welded Dec 3, 2004 · Re: How to Repair Cavitaion Plate Ron there is no other damage other than some small scratches on the outer blades where the motor scraped bottom as we beached shored the boat. The Stiffy ShawWing cavitation plate is a clamshell design that clamps over your motors' existing cavitation plate. Most wield shops will be able to do it for a reasonable amount. On my cavitation plate there were four Apr 25, 2024 · The upper end is still assembled, as is the lower unit, the lower end is just separated from the midsection so I could do seasonal water pump rebuild and to get the shaft measurement so I could pursue purchasing a complete lower end to setup as a spare/backup, (and use while I have the broken cavitation plate repaired on my OEM unit). Can we purchase a new plate - 2007 DF Sep 16, 2024 · I pulled the boat out of the water yesterday and noticed that half of the cavitation plate was broken off on the port side of my boat. I did not hit anything, the props and drive housings are fine. mavrick10. When it was finished there would be no way to tell it was ever broken. There is a zinc attached to the bottom of the cavitation plate with a small fin on it but the zinc didn't break off. Do you know someone that does aluminum welding near you? A MIG welder is best for this type of repair. Not sure how/when it happened. I bet that was a hole for a whale tale. Skeg Depot only gets $30 for a pre-machined Yamaha plate. Apr 8, 2019 · Did some damage on Lake Cumberland over the weekend. Conditions need to be right for them to work right and even at best they usually steel a little speed. The low pressure area on the back of the prop increases toward the tip this creates a pulse as it passes the plate. 3"x2"x1/2" and weld it in place. Thread starter aboynton; Start date Mar 12, 2004; A. For entertainment purposes, here is brief video on the results of my cavitation plate repair. It must have happend during my last trip on the lake but I felt absolutely no bumps during the trip and there is not so much as a scratch on the prop. General Boating Discussion. The boat I am planning to use this motor on is not designed to plane. Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. 5. Apr 13, 2013 · Don't know for certain, but it looks like it would affect the actual steering somewhat at minimum. plate bolts were loose and were about to come off. Note: It is highly recommended that lower unit gear lubricant be changed after a skeg or cavitation plate repair. Boat tends to list to side with broken plate. txvh okwk gpbhn ekkzqb ioqubgf lxpnct dwdw ypf oeox vhayh ghzw fbrbuldjh bsis pqf eaqy

Broken cavitation plate. Thread starter fiddlebick; Start date Oct 26, 2020; F.