The piston’s movement would then not create the pressure it was supposed to, and you’d be left with a lack of compression. As long as your reeds are not frayed and the reed cage has no imperfections then your fine. there should be a minimal amount of. Reed Valve Symptoms Idle. On the down stroke, the valve is closed and the air/fuel charge in the crankcase is pushed into the intake port and combustion chamber. Defect reed valve The reed valve can become leaky. Inspecting Outboard Motor Reed Valves. What are symptoms of bad reed valves?. The engine experiences intermittent power loss. In this video I take the reed valves out of the Yamaha 20HP 2-stroke to see if they are damaged and causing a lean condition. Less turbulence, better airflow Simply Better! Background for the Enthusiast We devote a lot of time and effort modifying engines to make them run better, faster, more efficiently, etc. If a reed is completely broken the bike will tend to not run at all. Reed Valve Symptoms Idle. During a two stroke cycle the fuel is forced into the combustion chamber by. Dont forget to richen up the low speed jets. Re: Symptom of reed valve failure? A broken/ leaking reed in a multiple cylinder engine will cause that cylinder [with the bad reed] to act lazydepending on the size of the leak, the engine could run fine at WOT, but will always be lazy at idle/part throttlea broken reed allows the intake charge being compressed in the crankcase to. Either run the engine or crank it over if it will not run. Reed Valve Failure – Air Compressor Reed Valve Troubleshooting. I have a 1992 2. It is therefore imperative to check the reed valve plate if you. Bad reeds make bikes hard to start and boggy in the low end. Turns out the reed went thru the motor, bounced around in the case for a bit, then disappeared into the guts of the motor. My intro was at the end of 1963, 10 years earlier. Im not all warm and fuzzy about running them either. Apart from these, drivers may also face trouble during acceleration due to a faulty reed valve. Because these reed valves checked out okay, Im going to take a look at the carburetors. Warmish 1 pull and sometimes a backfire or kinda a slow chug up to idle. Shop says these motors are bad news and hard on plugs and prone to this kind of problem. Warmish 1 pull and sometimes a backfire or kinda a slow chug up to idle. Looks like flap from reed valve got sucked into the cylinder and there may be some damage to the piston and cylinder which translates to a mini rebuild on that cylinder. Otherwise, the engine has ports without valves. As long as your reeds are not frayed and the reed cage has no imperfections then your fine. How to tell if your reed valves are bad Rolling Wrench 133K subscribers Join Subscribe Share Save 460K views 10 years ago Many newer 2-stroke scooter motors. Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. Decided to install a set of Chris Carson Reed Values (Sport Valves) on my 175 E-Tec. Reed valve in a two stroke engine – what it is and how it works?. 4K views 1 year ago Awakening a 90 HP Johnson. I read that the Optimax has known issue with bad reed valves after 300 hrs. How to tell if your reed valves are bad Rolling Wrench 133K subscribers Join Subscribe Share Save 460K views 10 years ago Many newer 2-stroke scooter motors have reed valve. While I would never encouraging sniffing your exhaust, combusted gearbox oil will have a different odor than the normal pre-mix oil the engine is using. Outboard Run With Low Compression?. Outboard reed valve diagnosis. 5 liter Mercury 200hp, 240hp, 260hp. Our Reed Plate Setup is for 5 petal Sport Jet or 7 Petal horizontal reed applications. Even if your boat motor will start, you should try to find out what’s causing the issue so you can fix it. And due to the lower pressure in the crank case, the exhaust fumes in the cylinder arent replaced by mixture very well. The reed valve is merely a check valve that helps direct the fuel/air flow within the engine. Re: Are my reed valves bad? On those fiber reeds, check for any sign of scorching as caused by a lean fire spit back. How to tell if your reed valves are bad Rolling Wrench 133K subscribers Join Subscribe Share Save 460K views 10 years ago Many newer 2-stroke scooter motors have reed valve. Reed valves on a two-stroke engine tend to be somewhat temperamental, as the inner workings of the assembly are very sensitive. Any cracks, chipping or uneven edges are a sign that the reed valves have failed. Reed valve in a two stroke engine – what it is and how it works?>Reed valve in a two stroke engine – what it is and how it works?. Difficulty starting the engine – Damaged reed valve petals can lead to less air being trapped in the cylinder, making it difficult for the engine to get its initial combustion when kickstarting. Your symptoms sound more like an issue with your TPS. dumps into crankcase, like diametrically opposite cylinder, most likely its. While the steel reeds are really tough, the aluminum reed blocks wear with age and the reed sealing at slow speeds can make idle uneven and irregular. It seems that the obvious symptoms of failure for the bleed check valves are the same as the obvious symptoms of many other possible. While the steel reeds are really tough, the aluminum reed blocks wear with age and the reed sealing at slow speeds can make idle uneven and irregular. The condition of your reeds in a 2 stroke outboard is indeed very critical to proper running quality and performance. I have an 06 225 VMAX HPDI with approximately 300 hours on it. But above or below this it would cough and hack like a sick dog. Did you get just the reeds, or the whole reed box assembly? If you have just the reeds, install them on what ever side lays the flatest. 7K 258K views 5 years ago In this video I take the reed valves out of the Yamaha 20HP 2-stroke to see if they are damaged and. all two strokes have reed valves?. The only benefit to having the reeds completely flat when at rest is you wouldnt have to flip the prop as fast to actuate the fuel pump in the carb. Put it in the water on Saturday and I couldnt get any more than 2,000 rpms. When an outboard boat motor “floods,” it has too much fuel in the cylinder. Spray some WD40 down the throat of the carb, if any of the oil blows back out of the carb back towards you, the reeds are bad. Blue smoke exiting the exhaust pipe after the engine has warmed may be a sign that gearbox oil is burning in the combustion chamber. I can think of several reason why reeds break and chip but my unqualified opinion is that its the rubber coating on the reed blocks. If the parts are damaged or worn down, they can immediately impact the air/fuel mixture. I want to check the reed valves while I have the carburator off as I have the symptoms of bad reed valves. Registered: 1214947529. How Do I Inspect Reed Valves. Does your 2 stroke engine use reed valves?>SER FAQ: LMFAQ: Does your 2 stroke engine use reed valves?. We also have our 1 inch Intake Spacer Plate for V6 2. What I found is it will not run clean on the bottom or the top end. Scream And Fly Powerboat and >Mercury Tech Reeds. Remove your reed valve and check the quality of it. Blue smoke exiting the exhaust pipe after the engine has warmed may be a sign that gearbox oil is burning in the combustion chamber. The condition of your reeds in a 2 stroke outboard is indeed very critical to proper running quality and performance. This little series of 7 videos covers replacing the Reed Valves in a Merc outboard motor. As well as rough running idle and a loud noisy running engine when it is idling. All reeds have a little reflux,but if one carb is spitting noticeably more than the rest check the reeds. But at a certain RPM around 6000 on the old Tcat triple it would run smooth. Its not very even to begin with and if your lap it you open up blister pockets. My 2006 225 had a broken reed,and when the dealer tried to order a new reed valve box they were on hold. One of the most noticeable signs of worn or cracked valve stem seals will be just after a cold engine start. Sometimes changing the connections and cleaning the plugs can solve the issue. Generally speaking its very easy to tell a reed is bad on a carb motorthe bad reed will cause a puff/spit from the carbits supposed to be a one way valve into the crankcase,not out. The engine may fail to respond to the increased fuel flow and then jump forward as the gas is finally ignited. It doesnt necessarily have to be a carbon reed valve, it can be a simple. In this case, some air can go through the carburetor three times, leading to a way too rich mixture. That was the point when the air/fuel would bounce back into the cylinders from the pipe cleanly and run fine. Shop says these motors are bad news and hard on plugs and prone to this kind of problem. The intake in front of the throttle bodies is always all wet. The reed valve is merely a check valve that helps direct the fuel/air flow within the engine. Things like high RPM misfires or not revving out are . In this video I take the reed valves out of the Yamaha 20HP 2-stroke to see if they are damaged and causing a lean condition. How to Troubleshoot a bad Reed Valve?. After tearing down the front of a motor that was. The manifold and Reeds will come off all in one piece. Common bad reed valve symptoms include a lack of power, engine hesitancy, excessive fuel consumption, and harsh idling. Most technicians will suspect a problem with the reed valves only after they have exhausted all other potential problems. Outboard Motor Bad Reed Plates. Mercury Optimax 225 Reed Valves. Apart from these, drivers may also face trouble during acceleration due to a faulty reed valve. In this video I take the reed valves out of the Yamaha 20HP 2-stroke to see if they are damaged and causing a lean condition. Or, you can simply place the palm of your hand over the throat of the. If you can hear it rattle, all should be fine. A bad reed will show up first as a sputtering and kickback on idle and then increasingly difficult to start as well as not liking large throttle movement at low rpm. ) One easy way to tell is to note where port is behind carburetor. What is the symptoms of a bad reed valve?. Outboard Motor Bad Reed Plates ShipShape Marine 5. Outboard reed valves Dangar Marine 231K subscribers Subscribe 2. Otherwise the crankcase pressure would just blow right on past the carbs. Excessive Coolant Exiting the Overflow Tube. A really common symptom of bad reed valves is a motor thats just really hard to start. I want to check the reed valves while I have the carburator off as I have the symptoms of bad reed valves. Re: Are my reed valves bad? On those fiber reeds, check for any sign of scorching as caused by a lean fire spit back. My DIY Relpacing Reed Valves in an Outboard Motor Part 3. The intake in front of the throttle bodies is always all wet. Generally speaking its very easy to tell a reed is bad on a carb motorthe bad reed will cause a puff/spit from the carbits supposed to be a one way valve into the. This trick was given to me by. Defect reed valve The reed valve can become leaky. To get into greater detail, when the valve malfunctions, it‘s most likely because its permanently stuck either open or closed. I want to check the reed valves while I have the carburator off as I have the symptoms of bad reed valves. This little series of 7 videos covers replacing the Reed Valves in a Merc outboard motor. How to Tell if Your Outboard Fuel Pump is Bad. Difficulty starting the engine - Damaged reed valve petals can lead to less air being trapped in the cylinder, making it difficult for the engine to get its initial combustion when kickstarting. If your reed valve is broken or cracked, it could allow the air/fuel/oil mixture to escape back through the intake. If your reed valve is broken or cracked, it could allow the air/fuel/oil mixture to escape back through the intake. Outboard reed valves Dangar Marine 231K subscribers Subscribe 2. it would seem super rich and bog bad almost the same as a faulty coil they arent that hard to check just pull them out inspect them for cracks as well if it isnt an extreme symptom it would lose a bit with just a cracked reed A Arctic Thunder Well-known member Dec 7, 2001 2,079 785 113 Lewiston, Idaho Jan 20, 2010 #3. cylinder 3: chips on petal ends. Did you get just the reeds, or the whole reed box assembly? If you have just the reeds, install them on what ever side lays the flatest. The symptoms of bad reed valves are that the compressor will struggle to build pressure past a certain point or it will not build any pressure at all. A really common symptom of bad reed valves is a motor thats just really hard to start. Another tell tale of a bad reed is fuel spitting back thru the carb (s). Outboard reed valve diagnosis Stefan Kozminchuk 138 subscribers Subscribe 90 Share 21K views 3 years ago 1970 33HP Evinrude Ski-Twin reed valve diagnostic trick. This little series of 7 videos covers replacing the Reed Valves in a Merc outboard motor. A really common symptom of bad reed valves is a motor thats just really hard to start. I have a 85 suzuki outboard i believe its a dt85,cant make. Outboard reed valve diagnosis Stefan Kozminchuk 138 subscribers Subscribe 90 Share 21K views 3 years ago 1970 33HP Evinrude Ski-Twin reed valve diagnostic trick. have some fuel vapor coming forward and forming wet areas puddling fuel and oil around the air inlet to the reed areaSometimes the motor will lean sneeze or cough at idle due to the correct amount of the combustable mixture that is. Re: Are my reed valves bad? On those fiber reeds, check for any sign of scorching as caused by a lean fire spit back. All reeds have a little reflux,but if one carb is spitting noticeably more than the rest check the reeds. Symptoms Of Bad Reed Valves OutboardMy DIY Relpacing Reed Valves in an Outboard Motor Part 4. it would seem super rich and bog bad almost the same as a faulty coil they arent that hard to check just pull them out inspect them for cracks as well if it isnt an extreme symptom it would lose a bit with just a cracked reed A Arctic Thunder Well-known member Dec 7, 2001 2,079 785 113 Lewiston, Idaho Jan 20, 2010 #3. You will have a loss of power. If it sucks the oil in, the reed is good. -- mike 03-25-2006, 12:54 PM #6 SportJ-US-1 5000 RPM Join Date Jun 2004 Location. Engines with reed valves that are failing can present symptoms of hesitation during acceleration. Common bad reed valve symptoms include a lack of power, engine hesitancy, excessive fuel consumption, and harsh idling. Turns out the reed went thru the motor,. Additional Troubleshooting Pages Air Compressor Types Troubleshooting. See more Reply Save Like mrfirecat · #4 · Feb 27, 2017. Re: Symptoms of reed failure ? Sure Smittyone big symptom of broken, cracked or missing reed is blow back through the carbusually really prevalent at low rpm. compression on my two stroke. Since a bad reed valve can be the cause of a variety of problems, knowing if you even have these can be useful - not all 2 stroke engines use reed valves. Re: Are my reed valves bad? On those fiber reeds, check for any sign of scorching as caused by a lean fire spit back. Typical symptom of reed valve petals damage and/or wear is difficulty to start the engine and uneven/non-smooth working manner. Bad PCV valve symptoms are various, from a Check Engine light to engine gasket leaks and decreased engine performance. The most likely reason why a two-stroke engine has lost compression is an issue with the piston or piston rings. The first sign is that it will backfire through the carb, or the engine may not run at all. It also intermittently looses or will not reach max RPM at WOT. How to Inspect Reed Valves on a Johnson 40hp Outboard. To get into greater detail, when the valve malfunctions, it‘s most likely because its permanently stuck either open or closed. Bad PCV valve symptoms are various, from a Check Engine light to engine gasket leaks and decreased engine performance. The fuel mixture can be pulled through it into the crankcase, but the valve closes when the pressure in the crankcase rises as the piston is on the downward stroke. A engine flooding would have fuel pouring out the front of the carburetor or passing thru the fuel pump diaphragm into the crankcase. Decided to install a set of Chris Carson Reed Values (Sport Valves) on my 175 E-Tec. I was a newly apprenticed Outboard Motor Tech & Auto electrician, 17 years old. If a reed is broken, fractured, or missingit is like having a hole in your engineand fuel cannot be properly delivered to the affected cylinder. When you flip the prop the vacum in the case will seal it up. One of the most noticeable signs of worn or cracked valve stem seals will be just after a cold engine start. Reed Valves: Signs of Problems. These are also the signs for many other mechanical issues that could be going on with your engine. Coolant blowing out the overflow tube is another good indicator of a leaking head gasket. To be honest with you, one of the most common causes of a motor running lean is blocked carburetors. Every once in a while has a high idle after a run for a few seconds. Spray some WD40 down the throat of the carb, if any of the oil blows back out of the carb back towards you, the reeds are bad. Bad PCV valve symptoms are various, from a Check Engine light to engine gasket leaks and decreased engine performance. If it sucks the oil in, the reed is good. For outboard repair information. Once all the bolts are removed you can pull the manifold off. It could also be a poor hole shot. Usually there is a power loss throughout the rev range and a decrease in fuel mileage. If a reed is broken, fractured, or missingit is like having a. Chris Carson Marine, Manufacturer of custom reed valves for. The symptoms of bad reed valves can include poor engine performance, stalling, and even damage to the engine components. If the vehicle has been sitting for any length of time or even overnight, the top of the head inside the. If the parts are damaged or worn down, they can immediately impact the air/fuel mixture from the carburetor, which then damages engine performance. Symptoms of a Bad PCV Valve. If a reed is broken, fractured, or missingit is like having a hole in your engineand fuel cannot be properly delivered to the affected cylinder. Does your 2 stroke engine use reed valves?. Remove your reed valve and check the quality of it. 10,004. symptoms of bad reed valves. Have you replaced the reed valve? but it does fit the symptoms, as does a broken reed valve, but then so does a bad crankcase seal. Which is based on the pressure pulses from. Checking for a bad reed valve is fairly simple. On the down stroke, the valve is closed and the air/fuel charge in the crankcase is pushed into the intake port and combustion chamber. Reeds should be occasionally checked for proper sealing and lack of chipped material or cracks. it would seem super rich and bog bad almost the same as a faulty coil they arent that hard to check just pull them out inspect them for cracks as well if it isnt an extreme symptom it would lose a bit with just a cracked reed A Arctic Thunder Well-known member Dec 7, 2001 2,079 785 113 Lewiston, Idaho Jan 20, 2010 #3. 2006 VMAX HPDI Broken Reed Valve. A really common symptom of bad reed valves is a motor thats just really hard to start. If your reed valve is broken or cracked, it could allow the air/fuel/oil mixture to escape back through the intake. We also have our 1 inch Intake Spacer Plate for V6 2. This can make it either difficult or impossible to start, depending on the severity of the situation. Rough idling - This is a similar problem to what causes the engine to have a difficult start. Failing reed valves can result in reduced power at what should be cruising speeds. 7K 258K views 5 years ago In this video I take the reed valves out of the Yamaha 20HP 2-stroke to see if they are. My DIY Relpacing Reed Valves in an Outboard Motor Part 3>My DIY Relpacing Reed Valves in an Outboard Motor Part 3. Could have better top end depending on conditions though. No real reason to do so other than wanting to know if it makes any difference and if I ever do have one to break it would not damage my engine. Reed valves help push air through a two-stroke engine that mixes with the fuel to create the combustion needed to Hesitation. It is most noticeable at idle and low speed. Reed valves on a two-stroke engine tend to be somewhat temperamental, as the inner workings of the assembly are very sensitive. A few weeks later my first ride was with a 75hp on a Pride 15 Starfire Hull. Re: Symptom of reed valve failure? A broken/ leaking reed in a multiple cylinder engine will cause that cylinder [with the bad reed] to act lazydepending on the size of the leak, the engine could run fine at WOT, but will always be lazy at idle/part throttlea broken reed allows the intake charge being compressed in the crankcase to. Simplicity, ease of alignment. Difficulty starting the engine – Damaged reed valve petals can lead to less air being trapped in the cylinder, making it difficult for the engine to get its initial combustion. Generally speaking its very easy to tell a reed is bad on a carb motorthe bad reed will cause a puff/spit from the carbits supposed to be a one way valve into the crankcase,not out. if broken or stuck open, the downward thrust of the related piston will result in fuel being blown out the carburetor throat. On the up stroke, the valve is open letting a new charge of the air/fuel mixture into the crankcase. Common bad reed valve symptoms include a lack of power, engine hesitancy, excessive fuel consumption, and harsh idling. 89K subscribers 9K views 10 years ago We have had a rash of bad reed plates recently. Reed Valves in an Outboard Motor Part 4>My DIY Relpacing Reed Valves in an Outboard Motor Part 4. Outboard Motor Bad Reed Plates ShipShape Marine 5. Looks like flap from reed valve got sucked into the cylinder and there may be some damage to the piston and cylinder which translates to a mini rebuild on that cylinder. In this video I take the reed valves out of the Yamaha 20HP 2-stroke to see if they are damaged and causing a lean condition. Apart from these, drivers may also face trouble during acceleration due to a faulty reed valve. It has been running rough and stalls occasionally at low RPM. Reed valves will not cause flooding. I can think of several reason why reeds break and chip but my unqualified opinion is that its the rubber coating on the reed blocks. How to Inspect Reed Valves on a Johnson 40hp …. A broken/ leaking reed in a multiple cylinder engine will cause that cylinder [with the bad reed] to act lazydepending on the size of the leak, the engine could run fine at WOT, but will always be lazy at idle/part throttlea broken reed allows the intake charge being compressed in the crankcase to bleed awayso that particular …. While it is common for coolant to exit the overflow tube when the bike has been tipped over or when it has overheated, it should not occur regularly. The reed valve assembly is no longer available for my motor, anywhere that I checked. Look for light emiting around the reed edges. Was uncrating a 1964 75hp Johnson. And, sometimes the problem continues to occur. If the vehicle has been sitting for any length of time or even overnight, the top of the head inside the valve cover will be coated with residual oil that was pumped up earlier during running operation. They are FOR SALE on our Ebay Store NOW! Visit Our Ebay Store to Buy your CCMS Reed Valves and. The intake in front of the throttle bodies is always all wet. Dont worry about that slight light leak. The industry standard untill recently has been carbon steel reeds on aluminum cages,with great success. 280hp and 300hp Drag EFI, Horn Style Intakes and Carbureted Outboards. When an outboard boat motor “floods,” it has too much fuel in the cylinder. Look for light emiting around the reed edges. What happens when reed valves fail?. com>Common Causes of Flooded Outboard Motors. Generally speaking its very easy to tell a reed is bad on a carb motorthe bad reed will cause a puff/spit from the carbits supposed to be a one way valve into the crankcase,not out. Jan 20, 2010. I was a newly apprenticed Outboard Motor Tech & Auto electrician, 17 years old. Outboard reed valves Dangar Marine 231K subscribers Subscribe 2. Aside from puling the reeds out and checking them what are the symptoms? I know hard starting, can bad reeds also cause fouling of plugs?. Because these reed valves checked out okay, Im going to take a look at the carburetors. How to tell if your reed valves are bad. Hum , never heard the water thing Lee Most of the time if the reeds are going away the idle is rough and irratic. This can be a frustrating symptom as several other factors also can be present. The reed valve is merely a check valve that helps direct the fuel/air flow within the engine. How to tell if your reed valves are bad Rolling Wrench 133K subscribers Join Subscribe Share Save 460K views 10 years ago Many newer 2-stroke scooter motors have reed valve. MRIGGS,I have studied reed valves a lot in the last few years,I also have been in the outboard business since the early 70s,and have seen a lot. Difficulty starting the engine – Damaged reed valve petals can lead to less air being trapped in the cylinder, making it difficult for the engine to get its initial combustion when kickstarting. Intermittent Loss of Power. What symptoms make you think they are broke? If one reed breaks there should be a strong puff of fuel/air out of the carb that serves that reed, and others. The best way of checking reeds are to remove them and hold a flashlight up to the reed block. The first sign is that it will backfire through the carb, or the engine may not run at all. The condition of your reeds in a 2 stroke outboard is indeed very critical to proper running quality and performance. Anyone know the symptoms of bad reed valves. Merc 650 reed valve issue??. CC round 1: cylinder 1: broken petals on 2 reeds. Outboard reed valves Dangar Marine 242K views 5 years ago Mercury Sport Jet 175XR2 with bad intake Reeds = rough idle or loss of RPM C K 4. Had this issue on my 90 Merc 100 bout 10 years back. Since a bad reed valve can be the cause of a variety of problems, knowing if you even have these can be useful - not all 2 stroke engines use reed valves. There is one odd size bolt that goes into the lower left hand side, make a mental note of where this is located. The best way of checking reeds are to remove them and hold a flashlight up to the reed block. Typical symptom of reed valve petals damage and/or wear is difficulty to start the engine and uneven/non-smooth working manner. 89K subscribers 9K views 10 years ago We have had a rash of bad reed plates recently. (Very hard to start cold, have to choke it to start when fully warmed up every time, major hesitation when accelerating). A typical symptom of a broken are damaged reed is a mist of fuel mix being spit out the throat . Rough idling – This is a similar problem to what causes the engine to have a difficult start. its not so easy to diagnose if its an Efi motor,but …. As concerns valves in 2-cycle engines, there is a reed valve that is a flap of spring steel over a port. its not so easy to diagnose if its an Efi motor,but. Which reed breakage on a E-Tec is unheard of Ran it hard this weekend in some rough seas and some backwater to test. If it sits for longe enough it will soak and drip to the ground. The Reed Valve Leak Test diagram (see thumbnail), which I also found in my shop manual, seems to indicate that the bleed valves screwed into the crankcase push air from the crankcase into the bleed hoses. It also intermittently looses or will not reach max RPM at WOT. Put your hand in front of the carb at low idle and see if it comes back wet with fuel. Performance wise it runs great. Checking for a bad reed valve is fairly simple. If the reed is only chipped you may not notice anything except reduced power from the affected cylinder and you may not notice that. Either way, the symptoms of a bad fuel pump on an outboard motor can The one-way valves are how the fuel is delivered to the carburetor. My intro was at the end of 1963, 10 years earlier. This article will discuss the steps necessary to figure out why your. A bad reed will show up first as a sputtering and kickback on idle and then increasingly difficult to start as well as not liking large throttle movement at low rpm. The mixture would just enter and expell. Since a bad reed valve can be the cause of a variety of problems, knowing if you even have these can be useful - not all 2 stroke engines use reed valves. Defect reed valve The reed valve can become leaky. If there is a crack in the piston, air can escape and cause a lack of compression. there should be a minimal amount of light coming through the area where the. One of the users mentioned that he suddenly saw Temp fault, oil level fault, TPS fault, mat fault, sensor fault, and some other warning signs going off all at once. Another tell tale of a bad reed is fuel spitting back thru the carb (s). For outboard repair information. You can , if the leak is bad enough. If any of these screws loosen as little as a quarter of a turn air begins to leak into the engine and the fuel/air mixture either is not pushed into the engine on the pistons downstroke or it becomes too lean for the engine to run by pulling in extra air during the pistons upstroke. If not, it might signal that the valve is clogged with oil and carbon buildup, and it cannot open or close properly. Did you get just the reeds, or the whole reed box assembly? If you have just the reeds, install them on what ever side lays the flatest. Remove all of the bolts holding the manifold on. In the mid 90s Merc went from alum to rubber coated cages,somewhat after OMC went with rubber cages on their 3 litre motors,and looper v4s. The piston is the part of the engine that creates the compression needed to run. Another tell tale of a bad reed is fuel spitting back thru the carb (s). I have a 85 suzuki outboard i believe its a dt85,cant make out first. Common bad reed valve symptoms include a lack of power, engine hesitancy, excessive fuel consumption, and harsh idling. Say one or two thousand RPM’s from your top end. I do not believe that reed valves make no difference in compression in an engine that is a reed design. Engines with reed valves that are failing can present symptoms of hesitation during acceleration. Checking for a bad reed valve is fairly simple. If any of these screws loosen as little as a quarter of a turn air begins to leak into the engine and the fuel/air mixture either is not pushed into the engine on the pistons downstroke or it becomes too lean for the engine to run by pulling in extra air during the pistons upstroke. On the up stroke, the valve is open letting a new charge of the air/fuel mixture into the crankcase. Steel reeds take quite a bit more pressure to open than fiberglass reeds, and that contributes to the uneven or ragged idle. Re: Symptom of reed valve failure? A broken/ leaking reed in a multiple cylinder engine will cause that cylinder [with the bad reed] to act lazy. Engine may stall out on acceleration as go past 1600 RPMs or so. If not, it might signal that the valve is clogged with oil and carbon buildup, and it cannot open or close properly. Simplicity, ease of alignment. Reed valves going bad can be difficult to diagnose as the symptoms can often be mistaken for problems. Great find with the reed. Well all two strokes with pressurized cases used to charge the cylinder with fuel have some variety of flapper valve, or rotary valve to provide this function. Here is a list of the location of the broken reeds on my motor: BRP original reeds: cylinder 3: 2 petals broken on one reed. One of the ways to check for proper sealing is to direct reed valve cone (with reeds outside) towards a strong light source. Look up at the reed valves through the bottom of the plate. outboard i believe its a dt85,cant make >I have a 85 suzuki outboard i believe its a dt85,cant make. I just this last week went through 24 of them to get 6 decent ones. Does your engine “load up” with unburnt fuel and oil resulting in poor idle . The hesitation in the engine due to failing reed valves can be very frustrating as the power is simply not available when needed. When you flip the prop the vacum in the case will seal it up. MRIGGS,I have studied reed valves a lot in the last few years,I also have been in the outboard business since the early 70s,and have seen a lot. Outboard reed valves Dangar Marine 242K views 5 years ago Mercury Sport Jet 175XR2 with bad intake Reeds = rough idle or loss of RPM C K 4. Hum , never heard the water thing Lee Most of the time if the reeds are going away the idle is rough and irratic. Symptom would be, down on power, the engine loses its ability to suck and hold the air/fuel inside the crankcase. To be honest with you, one of the most common causes of a motor running lean is blocked carburetors.