Sled slowly loses power during the course of the day. A forum community dedicated to Polaris ATV owners and enthusiasts. I don't think I have ever purchased anything from ebay before. Also, is there a part number on your flywheel, CDI unit or stator? • When your spark is an orange color, then that's weak spark for sure and won't ignite the fuel. No fire on 3 of them,and weak spark on 2 ngk's. It ran like this for months. was riding it and all seemed fine. I was at that point only getting 1 spark on the initial bump of the starter switch. I need a cdi with two 2 prong ends each containing a male and a female plug. Runs okay at 1/8 to ½ throttle. here is what i have done so far. Discussion Starter • #1 • Sep 24, 2012. I tried plugs that a friend had. Your IP: 125.212.228.161 Polaris said both of these are interchangeable but they are not. If after unplugging the 4-plug connector there is no spark or the spark still looks weak, this tells you … It had a really weak spark and now it has lost all spark. But your problem sounds a lot like the problem they had with the CDI on some of the early '90s models. Spark plugs keep getting richer/darker as the day goes on indicating weakening spark. The bike is hard too start. If I just turn the key over its very dim and weak. Come join the discussion about Rangers, Sportsmans, Scramblers, Magnums, and others. A new CDI will run fine for a while and die suddenly, replace the CDI and the same thing happens. Voltage to the white and blue wire from the cdi to the coil is only getting around 2 volts while cranking. I only have a basic Walmart volt meter so I can't test the spark the way stated. I ordered a cdi for it for the plug is different so I'm going to have to send it back. Another way to prevent getting this page in the future is to use Privacy Pass. I picked up this 2000 sportsman 500 that had an overcharge issue. In examining the differences in the wiring diagrams the only change that I can find is in the stator, flywheel and CDI units - the CDI charge coil and the battery charge coils have different outputs and the magnets in the flywheel may have different strength magnets - really need to know the VIN to determine what the right parts are. The speedo is burnt up. I have checked the voltage of the stator (getting 50 v output) and Ignition pick up (getting 0.5 v output) I don't have a peak attachment for my multimeter to check the peak voltage. I think I may have found my issue. The voltage regulator had gone bad and someone rode it with the voltage way to high and burned the parts up. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Hello. It sucks to get wrong parts, but it happens. Had to replace parts when I first purchased it because it had no spark at all. Since the ignition is AC excited (no battery needed) - a weak spark tells you the pulse generator coil is telling the CDI unit to fire the coil - generally speaking, having a weak , but consistent spark rules out the pulse coil, so the culprit is either a bad ground, the CDI unit or the stator. Also Know, what causes weak spark on ATV? Was running poorly above ½ throttle. Good luck and keep us … Weak trigger has been shown to cause a heat buildup inside of the CDI. I used the part number listed above and received the wrong cdi box. If you see spark coming from the end of the spark plug, your ATV engine is getting spark. In this case, the engine runs fine until engine temperatures rise and there is an increase in workload. I did the test where you pull the spark plug from cylinder head and ground it to the motor. This helps a lot. JavaScript is disabled. ... Hello, I have a Baja ATV with no spark. Hello, I'm new to the forum and really need some help. When pulling the plug, I could smell the starter fluid on it and was slightly wet. If the spark is consistently hot when you let off the starter button while the engine is turning over, but low with the starter button is still pressed, it is nearly always either the starter relay or the commutator and brushes on the starter itself. Top dead center mark is after the fire mark so pull spark plug use a straw bring piston to top and check which mark is at the timing mark.the firing mark are always before the piston reach top dead center noting is instantaneous it take time for the spark to travel from all the various electrical parts to be on time at the compression stroke. Cracked spark plug porcelain. Hold the electrodes of the spark plug close to the engine to ground it, and try starting the engine. I have replaced the CDI, rectifier, coil and wire, stator, and a new battery. This causes misfiring or bucking under load. I checked spark and it is real weak. Honda ATC 110 Weak Spark. I have been reading about spark issues on the Lakotas and have the same problem. It pretty much smoked the electronics. Open to Banshees, Raptors, Blasters, and others for recreational riding and racing. Since the ignition is AC excited (no battery needed) - a weak spark tells you the pulse generator coil is telling the CDI unit to fire the coil - generally speaking, having a weak, but consistent spark rules out the pulse coil, so the culprit is either a bad ground, the CDI unit or the stator. Not too hard to find. It was real hard to start and wouldn't idle so I started checking fuel and spark. For a better experience, please enable JavaScript in your browser before proceeding. It would be very helpful because I keep ordering parts that won't work. • The fact that you do get a weak spark may be indicative of a poor ground. Well that's interesting! Any idea what is causing the weak spark. The other thing I can think of is the resistor cap but you can't do any harm to a cdi by not using one the only thing you can damage is the spark plug wire and maybe the coil. I do not currently have a fuel tank hooked up (carb leaks), but I sprayed starter fluid in it. Got it figured out! Yes, a bad stator can cause a weak spark or a no spark condition. S ... A forum community dedicated to Yamaha ATV owners and enthusiasts. Just rebuilt my 400ex it has ran great and then it became hard to start. i can just barely see the spark at the plug. I do burn up the Amazon prime though! On a twin one cylinder fires and the other is weak or not firing. Seemed like it didnt have spark when it warmed up. 1986 Honda TRX250R Fourtrax. You may need to download version 2.0 now from the Chrome Web Store. The early and late 2000 500's all used the same engine cases, so either you got a wrong stator or simply didn't have it positioned correctly when installing it. They would only spark when you let off the start button. I've been looking around all day and it seems that the one that fits this one is harder to find than the early ones. A no spark issue is easier to pinpoint. Shop Owner and Mechanic with over 50 years experience. Research modifications, troubleshooting, maintenance, and more! If I jump 12 volts to the coil I get a bright heavy spark. Basically every part to do with firing is new besides the cdi box. My friends say cdi,rectifier,coil,magneto, but they think all you need for tools are a hammer,cresent wrench,channel locks,and sometimes a screw driver if you need to pry on something. To quickly tell if your ATV is getting spark, remove the spark plug from the engine. It may not have as much "power" if the spark is a little less than it should be, but definitely should run. Reinsert the plug back into the coil wire. Big bear 400 weak spark. While checking all connections try a little dielectric grease to help keep them intact. pulled in the driveway and pulled the clutch in to stop and it died and will not start back. The part I keep getting has a 2 prong male/female plug and a plug that is a 3 prong, 2 males and a female end. What's the VIN - I can perhaps tell you whether it's early or late by running it through Polaris. If this cdi doesn't fix it then idk what else to do. It has a weak spark when its pull started and none with the starter. A much more efficient way as latebird describes is to test and determine which part needs replaced. The spark was weak (small and yellow). It is not uncommn for this key to shear off and cause all kinds of ignition trouble. As far as the CDI goes, you did say it had a weak looking spark,,it should be a bright white/blue color. Weak ignition wire insulation. Weak orange or yellow spark tAo tao atv weak spark - ATVs question. Yamaha's Warrior ATV series operates on a CDI system to ignite its spark plug during operation. Also checed everything per the service manual. Cutting out. Usually leaves a pea-sized bump mark in the back of the CDI casing where the internal capacitor is located. Jump to Latest Follow 1 - 9 of 9 Posts. This minor explosion takes place in the engine’s intake or exhaust and can cause the vehicle to shut off. today I checked for spark and it was good so I put it together and it fired right up and ran fine for 10 minutes and then quit. No - they are not interchangeable - 3085639 has the 3 wire plug and 3086982 has the 2 wire plug - 3086982 is no longer available from Polaris, but I know at least one dealer that has one in stock @ $395, but you can change the stator to the early model stator and use the 3 wire plug - the flywheel is the same for both early and late models. The one I just sent back was from dB electrical but it had the other plugs. I thought the problem was in the carburetor, but after going through the carb I checked the bike for spark. It is 300 or 400 dollars. Performance & security by Cloudflare, Please complete the security check to access. weak spark. There is only 7 parts to the ignition - spark plug, spark plug cap, coil, CDI box, stator, flywheel and wiring - a weak spark can be any or all of the parts - generally, it's spark plug first, wiring connections second, spark plug cap third, stator charge coils fourth, coil fifth, CDI box sixth and flywheel last. It is very weak there also. Found one from rareelectrical for $44. Check the kill switch and other safety switches. pull your flywheel off and you will see a little half circle shaped groove in the crank. Maybe I can borrow one. I have replaced the stator, ... 1986 Honda Xr 600R Bike was hard to start and had weak spark Now has no spark and no juice to lead into ign. I have an atv with the same 49cc scooter engine most people have here. If the kill switch internals fails, it … I just got off the phone with polaris. On a triple 2 cylinders are firing but one is weak or does not have spark. Check the spark plug to make sure it is firing.. remove the spark plug.. make sure you have metal to metal contact and then turn the engine over.. (this might be a two man job).. the spark plug should have a nice big blue white spark,,(some electronic's will have a weak orange and still fire fine!) Changed the voltage regulator, coil, coil wire, coil wire end that plugs onto the spark plug. Hello, I am new to the forum. They looked up part numbers for my Vin number and brought up 3086982 and 3085639. Normally a blue white spark has lots of capacity to ignite fuel. My 2002 Arctic Cat 500 4x4 atv has spark only when you first press the start button then no spark. The only way I can get some spark is to gap the plug so tight, you can barely tell there is a spark jumping between it. Very frustrating that it was running one day then not the next. I could barely see a spark with the plug laying against cylinder head. Any recommendations on knock of brand parts? Common reasons include issues with the fuel/air mixture, carburetor, ignition, or fuel pump. Post by philstubbs onMay 2, 2014 at 3:06pm. ATVs commonly backfire due to the imbalance of air and fuel sparked outside of the combustion chamber. 4 ngk's 1 bosch. This unit is producing a blue spark, but it is very small. I was getting a no spark issue. just a couple of speculations... a points coil used with a cdi will give a weak spark because there's not enough differences in the number of windings between the primary and secondary. I also don't have a timing light but I do have a test light. Last week I was driving my big bear and everything was working as it should, at the end of the day I shut it off and the starter would not restart the bike, I checked the battery and it was dead. :nerd You have a late model based on the plugs to the CDI unit. I also don't think that will be sufficient either. Everything was fine all but the speedometer. coil Resistance tests have not been helpful in pinpointing the weak component. 2007 450 ER. I changed the stator/pulse coil all in one. Fouled spark plug. Tonight I went back out and went over the whole electrical system again. There should also be a little half circle shaped key (woodruff key) that fits in that groove and allows the groove in the flywheel to locate on. Come join the discussion about performance, modifications, classifieds, racing, maintenance, and more! The engine may run fine at idle and light load. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. O wow thank you. I have a very weak spark. A weak or absent spark is a symptom of problems occurring within the CDI unit or the ignition system. and could not get it to fire. https://www.ebay.com/sch/i.html?_fr...acat=0&LH_TitleDesc=0&_osacat=0&_odkw=3084879, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Replacement aftermarket CDI's can be had,,,do a search on ebay and find the better sellers....It won't be OEM, but should be a common part to get,,,even a … Here's a whole page full using part number 3086982 to search. This thing is about to make me pull my hair out. I ordered a stator before that came with the three prong and the bolt holes for the stator didn't line up on the engine. I will order the new cdi and see how it goes. Anyway, the stator Ohm readings are: Red-White =.495Ω-------in spec-- > between 459Ω and 561Ω Brwn-Green =.292Ω-----in spec-- … There's a spark, and it's mostly blue, but it isn't a very healthy FAT spark. I have no way to know if it's early or late model. I unplugged the ground wire up next to the cdi box that goes up to the speedo and it fired right up. Please enable Cookies and reload the page. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. I'm working on an old 72 Honda SL100(engine out of frame), and I'm getting spark, but it's pretty weak. OK - I don't suppose you know if you have an early or late production model? I get a weak spark and spark knock when I drink light beer! Cloudflare Ray ID: 641e76ba59dcd956 I'm having a problem finding the correct cdi box. Seriously, you could just have a loose ground on the coil. Yeah, you can replace parts willy nilly in the hopes of getting the faulty one but that can be time consuming and expensive. I have a 93 bayou that has been working great then it just quit. I pulled boot off wire and checked spark from wire. This situation causes misfire (no defined operating state) and hard starting. Shut if off one day and now it won't start.

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