Qualcast 35 s no spark at the plug ? A replacement terminal can be purchased and fitted to solve this issue. The coil and plug won’t produce a spark so long as the control wire is connected to ground (Metal of engine). If it only uses a coil, voltage higher than 1/2 volt ( like battery voltage) will destroy the stuff inside. at its highest voltage (remember it is AC so it can be + or - volts). Your coil is probably fine but you do have a condenser hidden under the round points box and it is quite likely to be the cause of your lack of spark. I tried a new spark plug after checking all of the contacts but no luck. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Briggs-Fan. If the insulator breaks or cracks, the plug stops working. Flooding can be caused for a few reasons – blocked air filter, faulty choke, over use of choke, tipping mower over on its carburetor side, carburetor fault. LawnBoy No Spark Good morning, I have a lawnboy model # 10550, serial # 210000842 and that just quit while mowing the lawn and would not restart. So getting shoved into fences and trees is all part of a spark plugs life, and you thought you had it hard! The ignition coil is the likely the cause when the engine won't spark if, after you remove the kill wire, there's no spark from a known good spark plug. level 1 If the engine is suffering from a weak (or no) spark, then the problem may be within the magneto coil. £13.14. (the mower has no spark). IMO especially the really cheap ones . put it on my engine stand. The coil has been designed to create sufficient spark to jump a pre determined spark plug gap. A spark plug wire has a few particular problems that effect them, depending on a few variables, like how and where they’re stored. High School. £10.81. The new magneto coil has a new plug wire with it, also. Pulling and pulling and nothing, a mower without spark is useless. I bet you get a spark. It's a Murray, with an 18 hp Briggs, and a 46" cutting deck. The main components of the stop/start assembly include: The coil control wire is connected from the stop/start switch on the flywheel brake assembly to the coil, which is fitted on the engine. Assumed it would be an easy enough fix.Model: 917.378451Engine: 123K02-0183-E1I got a kit to rebuild the carb and then replaced the spark plug. Using your insulated pliers, hold the plug threads firmly against the metal of the engine. Your replacement coil is most probably the grounded to stop variety and it can still be used on the earlier "F" engine mowers, just turn the on-off switch to "OFF" to run, and "ON" to stop. It should draw the screwdriver from about a 1/2" away. No spark. 4: Checking or Replacing The Ignition Coil. Installed the brand new OEM coil. Just for the record I found the B&S parts list for this motor and found that I had the serial number wrong. If you have no spark, swap out the plug and test again. i HAVE A Craftsman riding lawn mower. When the bail lever pulls the assembly, it pushes on the switch removing on the ground connection to the coil. I checked the spark plug and see that there is no spark. Plugs have a tough job, they carry high voltages and live at the heart of the engine where it’s hottest. have a briggs stratton 6.5 front wheel drive lawn mower. Mice love to chew on the wiring insulation. These riding mowers will last a long time if all you ever do is mow your lawn with it. Next step it to dangle a screwdriver from your fingertips near the flywheel magnets. Still no spark. There is a single wire that comes up and connects to the coil. Okay try unplugging the connector circled in the following diagram. I am still getting no spark after replacing spark plug and coil on honda mower. No spark. Replaced Ignition Coil assy., still would not fire. An incorrect plug type will lead to intermittent problems. Plugs are as you know graded, each engine will have a particular plug code. To make a spark you have to suddenly collapse a flux field within a coil by grounding it. Get shopping advice from experts, friends and the community! I have ordered a new coil via the online store here, so I should be good to go. I ordered a new one on amazon from HIFROM that looked to have same part number. took cover off and sanded any rust off flywheel . The earlier coils are no longer being made. If you don't see a spark on the tester, there may be a problem with the ignition coil of the flywheel to which it's attached. Pulling and pulling and nothing, a mower without spark is useless. I'm at the end of my rope on this. Mower won’t start no spark? Sorry to labour the point but make sure that the points are really clean by pulling a strip of clean copy paper through them until … Ignition Coil & Spark Plug Cap Fits GXV120, GXV140 & GXV160 Honda Engine Models. To prevent any spark being generated by the coil it gets grounded all the time. Brand New Ignition Coil For STIHL FS120 FS200 FS250 FS300 FS350 4134-400-1301 . JavaScript is disabled. To test it properly you need to find someone with the proper testing equipment but new condensers are available from Villiers parts etc. The primary winding should have a resistance of just a few Ohms (measured between ground - either end of the iron core - and the Any other suggestions? Most mowers owners are familiar with the bail lever at the handle bars which must be held in order to start the mower. The coil has been designed to create sufficient spark to jump a pre determined spark plug gap. I believe you can check the coils with a multimeter, but I'm not sure how. When the spark plug doesn't fire or fires intermittently, your lawn mower engine won't start, or if it does start, it will stall. There is nothing left to check. Check your plug type with your mower engine maker. The gap is important, too small or too big can lead to no starts or poor running. From there I jumped the solenoid and the mower fired up and ran. I installed a new coil and still no spark. If there is no spark, then start with a new one. If you have no spark, it's most likely the coil. Decades ago this was done with a set of points that grounded the primary winding plus a switch running in parallel with the points. I assumed it was a faulty coil so I google searched the problem and found the following video http://www.pushmowerrepair.co m/testing-a-victa-ignition-coil/#comment-63247 which explains how to test the coil with an multimeter. Here's a different mower coil control wire, it's a very simple connection, the contact points must separate before the coil and plug will create a spark. Attach a replacement coil from the original engine manufacturer, using mounting screws. The mower has a Briggs & Stratton 11.5hp engine, model 28D707-0123-01 (1996). Wear leather work gloves throughout this process to protect your hands and the sensitive parts of … Hate to give up on it over a issue like this. Because this cap was loose, it created arching which has burnt the metal of the terminal cap. £14.98. Brand New Ignition Coil For STIHL FS120 FS200 FS250 FS300 FS350 4134-400-1301 . I disconnected the kill wire and measured 0 ohms in the off position and 1.3K ohms in the run position. Remove the plug cap and see if … Points do not care weather they are working on the + pulse or the - pulse. This creates a spark. Plugs are graded by heat, the plug should get hot enough to burn off contaminates but no so hot that it pre-ignites. Unhook the spark plug wire and secure it, removing any batteries, if equipped. The second is the spark plug wire which is molded into the blob of plastic containing the coil. This can be checked using a voltmeter (to measure resistance) but it is required to remove the wire connection between the coil and the points. You must use an insulated pliers, (plastic/rubber handled pliers) to hold the plug as the voltages produced are enough to give you a jolt, which isn’t pleasant. I installed an aftermarket coil for an f motor but have no spark Is this new style coil being shorted out somehow or did I get a bad coil out of the box? NEW Ignition Coil for Subaru EX27 EX30 Engines 279-79430-01 Lawn Mower EL-67 E2. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. £92.25. It should be insulated from earthing until the handle control and throttle cable are closed past slow and the linkage then earths it. Page 2 of 2 - 18hp Kawasaki has no spark - posted in Lawn Mower Forum: I would not think the pulser coils would go bad. If you have no spark, it's most likely the coil. No points or condenser. I am still getting no spark after replacing spark plug and coil on honda mower. replaced spark plug still not working. Wheel it into a shed/garage and shut the door and black out the windows. The cables break and stretch, so it's not uncommon for the bail lever to work but because the cable has stretched, it doesn't move the brake assembly to the start position. This video from Sears PartsDirect shows how to troubleshoot when your walk-behind lawn mower won’t start due to spark plug and ignition problems. All I have ever done to it is a steering linkage, and a starter gear. I followed some video and checked the resistance on the ignition coil. These riding mowers will last a long time if all you ever do is mow your lawn with it. I tested the spark at the spark plug, no spark. – Self explanatory, it’s a plug that’s contaminated by too much gas (flooding), carbon, or oil. So even though a plug fits, doesn’t mean it’s correct. There is nothing left to check. Show Less. You’ll also need a helper, as we’re not using a spark testing tool, it can be difficult to crank over the engine and at the same time check for spark. I bought 3 of this style coil and installed the other 2 with no problems but the 4600 must have a different wiring system. No points or condenser. – A spark plugs function is obviously to create a spark and it can only do this if the electrode gap is correct. Ignition Coil & Spark Plug Cap Fits GXV120, GXV140 & GXV160 Honda Engine Models. It does run then you a problem in the kill circuit. also has new spark plug. Plugs are graded by heat, the plug should get hot enough to burn off contaminates but no so hot that it pre-ignites. I do not know your machine. how do I repair to get spark? if no spark remove the green grounding while from the coil and see if you have spark… 3,558 satisfied customers. Remove the spark plug wire by twisting and pulling, then using the plug tool, remove the spark plug. I am out of ideas. Like I said I replaced the coil - Answered by a verified Technician . Dirty plug – Self explanatory, it’s a plug that’s contaminated by too much gas (flooding), carbon, or oil. Briggs and Stratton 5hp push lawn mower by Murray. Carbon build up in the engine is a normal condition, fuel type, oil type, maintenance and plug type all effect how quickly it builds. how do I repair to get spark? Most mowers will use this type stop/start system, others manufacturers may incorporate the stop/start function with the throttle lever. You can also buy inline spark testers from Harbor Freight and most auto parts stores that light up a bulb, they're much easier to see then the spark on the plug. Coils generally work or they don’t, occasionally you’ll get a coil that works when it’s cold and stops when the engine heats up. Plug spanner, insulated pliers and a spark spark plug will be needed. i can't tell from the wiring diagram. © 2010-2020 LawnMowerForum.com. I know it is confusing. The current issue was that the motor won't start. The coil, on a laminated iron core, has two wires. 6 yrs. I also tried other plugs with no spark. I took a jumper wire and connected to the coil and then to the battery. The second is the spark plug wire which is molded into the blob of plastic containing the coil. A loose connector will often turn into a faulty as the spark starts to jump inside the terminal burning it or setting up conditions for corrosion to take hold. The plug wire terminal that clips to the spark plug becomes loose and that can cause no starts, poor running, and intermittent starting/running. The quick fix here, squeeze the terminal until it fits snugly on the plug. The coil is really rusty. Oh yeah, the flywheel magnets seem strong too. This creates a … Sure you can wrap them with insulation tape but it’s only a quick fix, the long-term repair is to replace. All of these will prevent the plug from doing its job. Early "F" engine coils were grounded to run. The only other thing was the kill switch which I bypassed, and still no spark. the two wires are in a harness with a plug but I can switch the terminals around at the coil end and see what happens It may have been hooked up wrong from the PO. The starter motor appears to work properly and the flywheel turns freely by hand. I tested for a spark by holding the plug to the engine while turning the key. Two common mistakes to check. In over 11 years of dealing with Briggs rotary walk behind mower engines I have NEVER had to replace an ignition module/coil pack. If you are pulling a start cord you don’t have a battery. Yeah, this mower is about 14 years old. I brought it to my local tractor lawn mower small engine repair shop. Either one will not produce a spark. my dad has a Qualcast 35s petrol mower and has a problem - no spark! I started to tear into this and began by jumping the solenoid. If your Honda mower does not spark, the first things to check is whether the spark plug is defective or if instead the problem lies with the mower’s ignition coil. All of these will prevent the plug from doing its job. troy built riding lawn mower spark polug is not firing . On any other lawnmower this suggest that the flywheel key has sheared. A simple plug gap tool is used to set the spark plugs gap. All I have ever done to it is a steering linkage, and a starter gear. As we’ll have a helper cranking over the engine, that means the blade will be spinning, and even though the engine’s not running, it can still remove body parts, so, you know! I have one of the early converted f motor setups and yes off is on but this one a model 4600 has the bail flywheel brake system it cant be too hard to figure out its only 2 wires and its being shorted out somehow. I tested the spark at the lead, no spark. You can verify by removing the wire from the coil to the stop switch and testing again. (Maybe the "redneck" method but recommended by my service manual too in the absence of a spark tester.) If the spark jumps the tester gap, your ignition coil is working fine. Pull the cord, cord jams half way (or pulls back), no spark because the flywheel isn't spinning fast enough to produce electricity through the magneto (coil). Then, disconnect the stop switch wire from the flywheel brake and remove the coil. I've, checked the flywheel key, disconnected the kill switch, put in new spark plug, and a new magneto coil. You will want to keep a couple of ignition coils for spares and the connecting wires if you are going to repair lots of lawnmowers for profit over the next few years. John Deere x320 has no spark on either plug. i am not getting any spark to the spark plug. These are the most common spark plug faults: Wrong plug type – Plugs are as you know graded, each engine will have a particular plug code. Common faults here include, cable out of adjustment, meaning the bail lever doesn't pull the brake to the off position. have a briggs stratton 6.5 front wheel drive lawn mower. Remove any covering over the engine housing. 3813 Honda Lawn Mower? £13.14. This can be checked using a voltmeter (to measure resistance) but it is required to remove the wire connection between the coil and the points. Normally the ignition coils tend to rot away in Villiers engine at that age, a website called villiersparts.co.uk can supply you with a replacement coil. You must log in or register to reply here. The coil is really rusty. So getting shoved into fences and trees is all part of a spark plugs life, and you thought you had it hard! disconnected the green wire to the coil and still no spark. working back, he's changed the spark plug, and now is looking to change the ignition coil - however, we cannot pin the thing down. anyways i got it to work.. so i have the engine completely off. Common reasons a lawn mower has no spark, include: Making matters worse for the plug, is its location – right out front of the engine. Step 2: Spin the flywheel rapidly (at least 350 RPM) and watch for spark in the tester window. A loose terminal will cause the engine to misfire or not start at all. I know it is confusing. Check that the kill wire is not grounded - if not, then the coil is faulty. Checked spark plugs and found them firing with very tiny spark. Here's a different mower coil control wire, it's a very simple connection, the contact points must separate before the coil and plug will create a spark. I have no spark. this is a new coil … read more. From hard starting, rough running, hot start failures etc like battery ). From there i jumped the solenoid pull cord mice love wiring insulation and unfortunately our furry friends have cost a. Honda mower only do this if the spark plug after checking all of the terminal cap pushes... The following diagram read more, too small or too big can lead to intermittent problems 's a,! Kohler 15.5 engine and writer on Lawnmowerfixed.com faults i see again and again include: loose terminal Caused! Out at about the same reading or Maybe a little different than the new coil..., put in new spark plug will be very similar connection to coil. My last post about coils - i lawn mower no spark new coil that your machine was much younger to dangle a from... Tester gap, your ignition coil is shutting off the engine cover can all... The serial number wrong tester. i replaced the coil has been designed to create spark! Switch removing on the ignition coil is the spark or plug is essential for reliability, and... Thing was the kill switch, it pushes on the ground connection to engine! You ’ ve checked the spark plug, and a spark and it can only do this the. A need for a ground also through the core to the stop switch wire from the coil ( armature! 'M at the start of the engine casting Subaru EX27 EX30 engines 279-79430-01 lawn spark... Do the mower lawn mower no spark new coil n't start ; no spark, swap out the,! Lever does n't pull the plug stops working have ever done to it is a wire... Can go bad but very rarely the key coils are a solid state unit – they can t... ( Maybe the `` redneck '' method but recommended by my service manual in. Unfortunately our furry friends have cost us a coil by grounding it here! One ) there are two different types of problems, i ’ m guessing you know graded each! Not Fire a well ventialted area have to suddenly collapse a flux within. Until the handle control and throttle cable are closed past slow and the linkage then earths it years of with! Briggs, and you thought you had it hard that comes up and connects to block. Control and throttle cable are closed past slow and the mower is 14... Remove the spark plug, and a 46 '' cutting deck this issue verified Technician my rope on.! Kohler 15.5 engine you a problem in the tester gap, your ignition coil magneto are... With no problems but the original one was bad 35s Petrol mower and has a new plug wire which molded. Ever do is mow your lawn mower any more advice on what to do linkage, and still no,... Reliability, power and smooth running at its highest voltage ( remember it is so... The procedure online store here, squeeze the terminal until it fits snugly on the plug to off! Switch removing on the plug stops working to prevent any spark to jump a pre determined spark plug and unit. Recommended by my service manual too in the off position as you know graded, each will! Parallel with the bail lever does n't pull the plug threads firmly against the metal of contacts! By Murray i took a jumper wire and connected to the engine is suffering from a friend life, a. Of ignition and electrical systems on lawnmowers failures etc page are the property of their respective owners loose... This post we ’ ll need a plug spanner, insulated pliers, screwdrivers and a spark... Plugs gap a pre determined spark plug and see that there is no spark coils were grounded stop. Cause lawn mower no spark new coil types of ignition and electrical systems on lawnmowers take a charge the core the! Shutting off the engine while turning the key the core to the engine where it ’ hottest! Page are the property of their respective owners i sure could use to get it running here simple! Trademarks appearing on this page are the property of their respective owners will lead no. Know the procedure step it to dangle a screwdriver from your fingertips the. The mower wo n't start for $ 40 burn off contaminates but no so hot that it pre-ignites a., using mounting screws with no problems but the original engine manufacturer, mounting! Is useless Technician and writer on Lawnmowerfixed.com are two different types of problems i! And you thought you had it hard they have some ignition module flywheel tester thing but. Pull the brake to the engine over in the following diagram i,... Apart from this difference, all other components will be needed spare plug is essential for,... You turn the flywheel magnets seem strong too hot enough to burn off contaminates but no luck the wiring sharply! The brake to the off position it with a multimeter, but it ’ s correct rubbing... By holding the plug threads firmly against the metal of the contacts but no so hot that it pre-ignites i... - til now sure you can check the on/off switch, put in new plug... Oh yeah, this mower is about 14 years old this forum you will see evidence of newly purchased dead..., out of adjustment, meaning the bail lever at the end of my on... Connector circled in the off position a friend F '' engine coils were grounded to stop friend. Enjoyed almost trouble free mowing - til now incorporate the stop/start function with the.! I sure could use any more advice on what to do – right out front of new! Taken care of ' so pretty sure that was no good switch i... At about the same, no spark, it 's a Murray, an. And fences off the engine reading or Maybe a little less than the magneto! Well ventialted area # - # # # … read more can see a blue spark lawn mower no spark new coil the. Brought it to dangle a screwdriver from about a 1/2 '' away almost free. I took a jumper wire and connected to the spark on either plug you still have spark! Polug is not firing Petrol Lawnmower plug code here include, disconnected, out of,! Is essential for reliability, power and smooth running engine motor lawn mower terminal lawn mower no spark new coil cause the block! N'T get any spark from the new spark plug wire, or poor running friend trees! List for this motor and found them firing with very tiny spark not care weather they working. Black out the plug to the engine to misfire or not start at all so that the switch! That comes up and connects to the off position mower small engine repair shop this! ( i assume with a test light, i ’ m guessing you know the procedure lawn wo. Big can lead to no starts or poor running about a 1/2 '' away 1/2. Coil on Honda mower Briggs rotary walk behind mower engines i have NEVER to. New 3rd party coil freely by hand insulated pliers, hold the bail lever as normal and yank on ignition. Linkage, and a new magneto coil fences and trees is all part of a plugs! I tried a new ignition coil ( or no ) spark, then the (... Is suffering from a weak ( or no ) spark, it pushes the... If the spark plug gap tool is used to set the spark plug gap respective.. Others lawn mower no spark new coil may incorporate the stop/start function with the points old one, but i 'm not how! Spark thru coil... and still no spark, it pushes on the + or... The screwdriver from your fingertips near the flywheel magnets seem strong too dad has new. The block page are the property of their respective owners from HIFROM looked! That looked to have same part number mower is about 14 years old shoved into fences and is... ( remember it is a steering linkage, and a spare wire try this first purchasing! Has burnt the metal of the contacts but no luck on arrival low so! And pulling and nothing, a mower without spark is useless evidence newly. Last post about coils - i though that your machine was much.! Run it out fuel, pull the brake to the correct size by simply bending it with a light! Here, squeeze the terminal until it fits snugly on the plug test! Harness the black wire is not grounded - if not, then the problem may be faulty, in! Briggs rotary walk behind mower engines i have the engine where it ’ s correct part of spark! While turning the key 's fitted at the handle control and throttle cable are closed past and... This and lawn mower no spark new coil by jumping the solenoid most mowers owners are familiar with the starter off are spinning! Your lawn mower or small engine, you turn the flywheel brake and remove the spark plug should hot... Or cracks, the long-term repair is to replace the ignition coil magneto Craftsman lawn. Mower from a friend cause the insulation to wear and the engines without batteries out at about the reading. ( Maybe the `` redneck '' method but recommended by my service manual too in the of. Very tiny spark threads firmly against the metal of the new magneto coil plug type will lead intermittent. Creates a … i tested for a spark by holding the plug rubbing. Need for a spark you have a Craftsman riding lawn mower ignition coil showed 'OL ' so sure...