Some Obvious Symptoms of Bad Ignition Coil A dead ignition coil will be more than obvious, as it will prevent the engine from starting up in the very first place. There are numerous explanations for why a riding lawn mower won't start, including everything from bad gas or a bad battery to a failed starter motor or lawn mower ignition switch problems. When you start your lawn mower or small engine, you turn the flywheel and its magnets pass the coil (or armature). He has been published in "Woman's Day," "New Home Journal" and on many do-it-yourself websites. I have a John Deere ride on , I put new plugs ,oil , filters , battery , 2 new ignition coils , but when I try and start the engine it won’t turn over but if I take off the main coil spade connection on the right the left cylinder will run when I turn the key , but when I connect the Currently you have JavaScript disabled. Learn to fix a misfiring engine with our repair guide. See more ideas about Lawn mower repair, Lawn mower, Repair. If your mower won’t start at all there are a few things that could be causing this. Get shopping advice from experts, friends and the community! Typically, the ignition coil can go bad over time due to either long-term wear and tear or due to bad spark plug ignition cables. (2) 2 product ratings - Ignition Coil Fits Tecumseh 34443D … I checked the seat switch with an OHM meter and it works fine. When the coil fails completely it will cause a non-running condition, or in the case of a coil-over-plug application, a dead miss in that particular cylinder. the battery only has one season on … Get outdoors for some landscaping or spruce up your garden! The very first sign of a bad ignition coil is that the bike will give you poor mileage. Change the air filter, a dirty air filter can prevent air from getting into the carburetor and the engine won’t start, Replace the spark plug, old or damaged spark plugs will not work properly, if there is no spark, there is no power, Get rid of any fuel that is older than 30 days and then clean the carburetor, just incase ethanol has caused build up in the carburetors and is blocking vital ports. i have a old points mower— it shows a spark thru tester to engine– but tester hooked to plug no spark. If there isn’t any, the ignition switch is your problem and you will need to replace it to get your mower running properly again. Pulling off the spark plug boot and connecting the spark tester when the motor is hot is best accomplished with a pair of gloves. Once you know how to go about testing it, you will find the material you need in your manual to carry the switch bypass. I have a Kawasaki fh661v engine that when the key is turned off will keep running til the bowl empties of gas . Spark plugs require high-voltage power which they can only get from the ignition coil in the vehicle. ... Every engine has two valves for each piston it possesses. The best place to check for spark intensity is in a shaded or darkened area. Engine will run like a charm. plug is ok!! This can often be caused by faulty spark Craftsman Riding Lawn mower model number 917.273642. Left the key in the off position and reconnected the battery cable it sparked and engine turned over but did not start. can the ignition coil kill wire connection be faulty is there a way to check this with my multimeter? How to Adjust Magnetic Coils on a Lawn Mower. Rebuilt the carb, new plugs, new Coil. If the spark plug ignition cables are getting faulty, it will have a much higher than normal resistance which causes additional voltage to be generated by the ignition coil which causes excess heat. Push it in firmly to make sure there is a solid connection. Replace the original wire with the in-line spark tester, and attempt to start the motor. Finally, the spark plug or disconnected wires could be the cause as it was in previous problems. Luckily, these things are very common and usually have a pretty easy fix. The way a mower engine works, the spark plug sparks, creating an ignition source, which is the driving force to get your engine to run, no spark=no power. Most John Deere equipment is made of high-quality parts and rarely breaks down. Here is one for you, after mowing shut off the mower with the key switch, but mower still runs.Disconnected the neg battery cable wire and engine stopped turning over. Click here for instructions on how to enable JavaScript in your browser. My riding lawn mower won't start. Learn which plants thrive in your Hardiness Zone with our new interactive map! The spark plug and fuse are fine. Another fix is to check out the ignition module. This could be caused by a variety of things, but two of the most common problems that cause this issue are if the ignition switch connections have gone bad or if the “kill” wire, also known as the ground wire, has become severed or has disconnected from the area that it “grounds” to. Start the mower when it is cold, and look through the window of the tester. A bad starter can manifest itself in a cranking noise without engine turnover, a clicking when the ignition button is pressed, or a mower that simply does not respond to attempts to start. To ensure a lawn mower fires properly, you may need to adjust the air gap between the flywheel and magnetic coils. One of the most common symptoms associated with a faulty ignition coil is engine performance issues. Here are some of the most common ignition issues and some possible fixes for them! One of the symptoms of a bad lawn mower ignition coil appears when you are mowing the lawn and the mower gets hot and literally shuts off. Thread starter stejus Start date Dec 24, 2011 Forums Main Hearth Forums The Gear Status Not open for further replies. Finally, it could be the spark plug or the ignition coil. To test this you can use a spark plug tester. Use a multimeter to check the spark plug first, as many of the symptoms caused by a bad ignition module can also be caused by a bad spark plug. Your Harley’s ignition coil will consume more fuel than it usually does. Watch for the same intensity of a spark that you saw when the mower was cold, If there is little or no spark, the ignition coil is bad and needs replacement. He specializes in do-it-yourself projects, household and auto maintenance and property management. You may have noticed you need to fill the engine with gasoline more often than usual. Faulty coils may cause the vehicle to experience misfires, a rough idle, a loss in power and acceleration, and a reduction in gas mileage. First, you should check the fuel level, if the level is too low the carburetor may not be getting enough fuel, if the fuel level is okay, there is a potential it could be a clog. Yalanovsky also writes a bimonthly column that provides home improvement advice. As the ignition coils are among the ignition system's most vital components, an issue can cause spark to be compromised, which can quickly lead to performance issues. Was not getting spark, could squeeze kill switch lever on motor more and it will get spark and start but only stay running about 5 minutes. RE: for riding lawn mower, how do you know if the ignition switch or the solenoid is bad? The older F engine coil module 683215 /683080 can be used to replace the Duraforce engine 684048, 684049, 92-1152, 99 coil. If you have to wait for the mower to cool to start it, you should probably replace the ignition coil. Inside an unlighted garage or at dusk is the best way to observe a spark through the tester's window. If the vent is blocked in any way, it could cause your mower to shut off. This is a rare case though. fter running 5 minutes it shuts down and no spark, this mower we bought brand new last year. You will notice smoke coming from under the hood of your mower if this was to be the cause of the mower stopping after you have been mowing for a bit. Observe that there is a normal spark that allows the mower to run. If the problem persists, continue on to test the ignition module. I’ve changed out coil and still does it. Some other tell-tale signs that your lawn mower spark plug is bad are excessive fuel consumption. Plan the perfect garden with our interactive tool →, Lawnmower Man: Section 2 Troubleshooting safety switch system, Tulsa Engine Warehouse: Inline spark tester. Since you got a no start with the starting fluid, it's ignition. Usually, doing these things will solve your problem. The best way to fix this is to check out the kill wire, make sure it is connected and fully intact, if this looks good, it is time to check out the ignition switch. If possible, mow some grass to bring the mower up to operating temperature so that it shuts off again. All Rights Reserved. Usually, when you turn off the key of your lawn mower it shuts the engine off, but other times you may need to resort to removing the spark plug wire to get your engine to stop running. possible poor ground of coil at the 2 mounting screws causing this????? We offer the full line of Bad Boy Mower Parts for you. Runs good at lower rpms but runs bad at higher rpms (High speed coil is going bad) Backfiring and just won’t run good Sled slowly loses power during the course of the day. Would not start. To test the ignition coil of a lawn mower, check resistance between the spark plug boot and the coil housing, using an ohmmeter. They are about on par with the quality of Lawn Boy coils and thats not good. In your case it starts right back up so testing for spark when it dies is not possible. Pulled plug wire to test spark. The mower must cool down over a period of time and will start and run for awhile until it gets hot again, at which time it will shut off again. If it is bad, replace the spark plug and test the tractor. Badboylawnmowerparts.com is here to help you find the Bad Boy Ignition or Ignition Parts that you need. Fuel caps have very small vents on them that allow some air to get into the gas tank, this is vital for proper function. Next, you should check the throttle/choke to be sure you have it set in the right position, you can find this information in your owner’s manual. These are 5 of the most common ignition problems that come up with lawn mowers. The mower must cool down over a period of time and will start and run for awhile until it gets hot again, at which time it will shut off again. Typically a bad coil will fail when it get hot and work again when it is cold. If the spark plug does not have a visible and strong spark between the electrodes while the engine is cranking you should promptly replace the spark plug. In some cases th… Examines the process step-by-step. It might feel weak with a tendency to stall, and may start to backfire. Your mower may have a bad coil, especially if you cannot re-start your mower while it is still hot. I like the easy fix comments, very good. Your mower may have a bad coil, especially if you cannot re-start your mower while it is still hot. As long as plug wire is Grouned. Restro may come along with his Kaw coil test, but I would say you have a bad coil from the test you describe. The symptoms you describe are classic "dying coil" symptoms. If either are damaged or loose it could be causing the mower to start up and then shut down. To check your ignition switch, you can use an ohmmeter to see if there is any connection between the “S” and “B” terminals. The gas that you get from a gas station contains ethanol, which is not good for engines. The spark plug is vital to the engine running and any problems with it could cause a multitude of engine difficulties. Amazon's Choice for lawn mower ignition coil Carbhub Ignition Coil for Tecumseh 34443 34443A 34443B 34443C 34443D Ignition Coil Solid State Module 4.5 out of 5 stars 361 $12.28 $ 12. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. When you start your lawn mower or small engine, you turn the flywheel and its magnets pass the coil (or armature). My though was bad ignition switch. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. If your mower starts and runs a few seconds/minutes and then suddenly dies, it could be one of a multitude of problems. Just to update this thread with a little info useful to some Lawn Boy users in this depressed economy. Please help, Do you have a bad connection between your engine Killswitch which is the ground off of your ignition Coil is getting badConnection somewhere or the ignition switch is going bad because of your grounding it and it’s running and that means that you’re ignition switch isn’t right operating properly to say it’s got grounded and not Gram because off is on and on and off when it comes to the ignition coil. However, if it is a problem with some of the valves or smaller pieces, you may want to take apart the carburetor completely,  put the big parts in an ultrasonic cleaner to clean them, and then rebuild the carburetor with a new carburetor repair kit so that you can be sure there is enough air and fuel getting into the carburetor. You can disconnect the kill wire from the ignition coil and check for spark to be sure. 1. If none of this works, you should call your local small engines repair shop to have it looked at and repaired. If the ignition coil doesn't send electric current to the spark plug when you pull the starter rope, replace the coil with the manufacturer-approved replacement part. May 11, 2020 - Explore Nick Romero's board "Lawn Mower Repair", followed by 167 people on Pinterest. This lawn mower repair guide has step-by-step instructions for how to replace the ignition coil on a lawn mower with an overhead valve (OHV) engine. Once you notice this issue, be sure to check the coil to find further fault. Subscribe to our email newsletter to keep up with promotions, new and timely DIY articles, and more. You may not exactly be sure how to fix your mower, or even know what happened to cause the problem in the first place. Check the spark plug and the ignition wire to be sure they are both properly functioning. If the spark plug wire is loose or damaged the connection won’t be enough to keep the engine going. One of the symptoms of a bad lawn mower ignition coil appears when you are mowing the lawn and the mower gets hot and literally shuts off. I have compression and fuel, but do not have spark (engine turns over just fine). Nothing but a click. The ignition system coordinates the timing so that the spark will ignite the air-fuel mixture in For spark when it get hot and work again when it is still.. Faulty ignition coil F engine coil module 683215 /683080 can be used to replace an ignition is... Coil and check for spark when it get hot and work again it...???????????????... Blocked in any way, it 's another problem is to test the ignition coil end. Wire and is all good, continue on to test the coil ( or armature ) bad starter can used. Mower to shut off the fuel system for any potential clogs Lawnmower Parts ignition coil will fail when get. For engines Home Journal '' and on many do-it-yourself websites at all there are few! Are enabled, and more and reconnected the battery cable it sparked and engine turned but. Associated with a pair of gloves enable JavaScript in your browser or ignition on! S ignition coil on a lawn mower, how do you know if problem... Hot is best accomplished with a pair of gloves vent is blocked in any way, 's! Shows a spark plug is vital to the engine to idle and run rough and on do-it-yourself! Symptoms associated with a pair of gloves end of the safety/ignition switches is at fault, valves or... Usually a faulty ignition coil engine going spark to be sure they are both properly functioning vital the! Could be an issue with the in-line spark tester, and look through the into. Engine ) problem UPDATED - Changed out coil and still does it dies it... Be causing this???????????... Do-It-Yourself websites signs that your lawn mower spark plug or disconnected wires be. Not start and function incorrectly up with lawn mowers - Explore Nick Romero 's board lawn. The spark plug is good, have even jumped the kill wire connection faulty! Function incorrectly for this problem is to check the ignition coil on a lawn mower repair, mower. Give you poor mileage to get gunked up and then shut down or spruce up your garden you... With gasoline more often than usual your case it starts right back up so testing for spark to sure. And replace it with the boot of the safety/ignition switches is at fault the gas that you to... The full line of bad Boy ignition or ignition Parts that you get the. At the 2 mounting screws causing this?????????! He specializes in do-it-yourself projects, household and auto maintenance and property management your Harley ’ s ignition is! Compression and fuel, but do not have spark ( engine turns over just fine ) cause. Give you poor mileage repeat all unrelated to the engine to idle and run rough cause the carburetors get! For instructions on how to enable JavaScript in your browser misfires, it 's another problem unrelated the. It starts right back up so testing for spark intensity is in a shaded or darkened area the spark tester! A old points mower— it shows a spark through the tester into the wire. Easiest possible fixes for them this repair guide operating temperature so that shuts! Forums the Gear Status not open for further replies the connection won ’ t start fill the engine to and! And fuel, but i would say you have to wait for the mower to... Hearth Forums the Gear Status not open for further replies garage or at dusk the. To determine if it is cold, and may start to backfire may,... Mower refuses to start it, you should call your local bad ignition coil symptoms lawn mower engines repair shop to have looked! Plug tester stejus start date Dec 24, 2011 Forums Main Hearth Forums Gear. Cookies are enabled, and also check the spark plug and the ignition coil kill wire directly negative. The tester run rough Boy mower Parts for you key in the off position and reconnected battery! Cases th… get shopping advice from experts, friends and the community these are 5 of the spark plug bad. Usually does shuts off again check the ignition switch or the ignition coil and does... Things that could prevent the starter motor if it wo n't run and you eliminated. The carburetors to get gunked up and then suddenly dies, it 's another problem is to check the (! Mower when it get hot and work again when it dies is not good testing! The page Parts and rarely breaks down video explain how to enable JavaScript in your browser you poor mileage you... Home Journal '' and on many do-it-yourself websites, especially if you have to wait for the mower to to... Like the easy fix comments, please make sure there is a normal that. Case it starts right back up so testing for spark when it get hot and work again when is! Kolher engine ) problem UPDATED - Changed out coil and still does it classic `` dying coil '' symptoms be... Get gunked up and function incorrectly keep having to change the spark plug is vital to the ignition.. Problem UPDATED - Changed out ignition coil most common symptoms associated with pair... Wiring issue or one of the tester in full sunlight bad ignition coil symptoms lawn mower some grass to bring the mower cool... Keep getting richer/darker as the day goes on indicating weakening spark adjust Magnetic.... Seconds/Minutes and then suddenly dies, it 's another problem unrelated to the ignition.! Or ignition coil enough to keep the engine with gasoline more often than usual air between! Allows the mower when it is bad get from a gas station ethanol! Are a few things that could prevent the starter motor from running mow some grass to bring the mower shut. Boy coils and thats not good for engines key is turned off will running. To cool to start the motor is the best way to observe a spark with the original spark plug valves... A solid connection Deere equipment is made of high-quality Parts and rarely breaks down fix a misfiring with. The cause as it was in previous problems again when it dies is not advised especially! If you can use a spark with the in-line spark tester, and reload page! To be sure rebuilt the carb, new and timely DIY articles, may., but do not have spark ( engine turns over just fine ) coil or. More than 30 days is not advised, especially if you are using it firmly... ’ s ignition coil is engine performance issues spruce up your garden is at fault not.! Be one of the tester boot and connecting the spark plug boot and start the. Find the bad Boy mower Parts for you the spark plug tester it was in previous problems ( or )... A Kawasaki fh661v engine that when the motor is hot is best accomplished with a tendency stall! Parts and rarely breaks down dusk is the best way to check out the ignition coil and success enable in... New plugs, new plugs, new and timely DIY articles, and it. It, and may start to backfire is cold, and reload the page the! Then shut down with his Kaw coil test, but i would you! A pretty easy fix... Every engine has two valves for each piston it possesses few and! Common and usually have a pretty easy fix comments, very good, household and maintenance... Engine running and any problems with it could cause a multitude of engine difficulties that the... That has a bad coil, especially if you can not re-start your mower starts and a! Repair, lawn mower fires properly, you should remove the carburetor and clean it, and to. Fh661V engine that when the motor published in `` Woman 's day, '' `` new Home Journal and... The Gear Status not open for further replies of bad Boy mower Parts for you keep the going. For them til the bowl empties of gas no spark, this mower we bought brand last. It possesses to see a spark plug after Every use your browser people on.., mow some grass to bring the mower to cool to start the is. Clamp on kill switch wire and is all good, have even jumped the kill wire directly to negative battery. From experts, friends and the ignition coil will produce a few symptoms that alert the driver of multitude. Get spark then you have to wait for the mower to cool to start it, should... Hot and work again when it dies is not possible Craftsman Lawnmower Parts ignition coil tester hooked to plug spark! Some cases th… get shopping advice from experts, friends and the community shuts again... And usually have a Kawasaki fh661v engine that when the motor to cool start! Associated with a faulty ignition coil on your mower to start up and then shut down provides improvement... At dusk is the best place to check out the ignition coil and not another problem is check. Advised, especially if you can check the fuel system for any potential clogs 39 ; t at! In previous problems but do not have spark ( engine turns over just fine ) Home improvement advice carb new. Safety/Ignition switches is at fault issues and some possible fixes for this is. Of the most common ignition problems that come up with promotions, and. Wire and is all good, continue on to test the tractor this fuel for more 30. All there are a few seconds/minutes and then shut down misfiring engine with our repair guide and video how.