A spark plug wire has a few particular problems that effect them, depending on a few variables, like how and where they’re stored. I checked the spark plug and see that there is no spark. You can verify by removing the wire from the coil to the stop switch and testing again. It ohms out at about the same reading or maybe a little less than the new 3rd party coil. £13.14. Seeing that you have replaced the coil (I assume with a new one ) There are two possibilities here.. 1. How To Replace The Ignition Coil On A Petrol Lawnmower. No points or condenser. One, is the coil installed correctly? my dad has a Qualcast 35s petrol mower and has a problem - no spark! Briggs and Stratton 5hp push lawn mower by Murray. It's a Murray, with an 18 hp Briggs, and a 46" cutting deck. Visually check the kill wire from where it leaves the coil, its exit from the magneto back plate to its termination on the throttle plate. I'm at the end of my rope on this. Oil on the plug is common too, it’s caused by too much oil, blocked crankcase breather, head gasket fault, engine wear, wrong plug type. briggs stratton 6.5 no spark to spark plug? – Self explanatory, it’s a plug that’s contaminated by too much gas (flooding), carbon, or oil. Donald. © 2010-2020 LawnMowerForum.com. Small Engine Technician. I bet you get a spark. I ordered a new one on amazon from HIFROM that looked to have same part number. The gap is important, too small or too big can lead to no starts or poor running. The common faults I see again and again include: Loose terminal – Caused by our old friend the trees, shrubs and fences. if no spark remove the green grounding while from the coil and see if you have spark… changed spark plugs and still no spark. If the engine is suffering from a weak (or no) spark, then the problem may be within the magneto coil. All of these will prevent the plug from doing its job. 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. 19 hp briggs & stratton twin engine . Coils are a solid state unit – they can’t be repaired. No spark thru coil ... and still no spark. £13.14. This is known as grounding, if the plug doesn't make good contact with the metal of the engine, you won't get a spark. 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. There is nothing left to check. 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. 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. Coil control is a single wire with push on connection. Page 2 of 2 - 18hp Kawasaki has no spark - posted in Lawn Mower Forum: I would not think the pulser coils would go bad. 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. It’s packed with 25 years experience, tips, tricks and hacks and the best bit, you’ll save a packet on mower repair bills. Early "F" engine coils were grounded to run. Make sure this is outside in a well ventialted area. Sure you can wrap them with insulation tape but it’s only a quick fix, the long-term repair is to replace. The 35s I have has been laid for a number years and I tried to get it to go today - I am not getting a spark at the plug - I took the plug out and held it against the engine with the HT lead attached and turned over the engine - there was no spark observed - can you please advise . Plugs are graded by heat, the plug should get hot enough to burn off contaminates but no so hot that it pre-ignites. If it only uses a coil, voltage higher than 1/2 volt ( like battery voltage) will destroy the stuff inside. The mower has a Briggs & Stratton 11.5hp engine, model 28D707-0123-01 (1996). Visually check the kill wire from where it leaves the coil, its exit from the magneto back plate to its termination on the throttle plate. Most mowers owners are familiar with the bail lever at the handle bars which must be held in order to start the mower. It is the magneto kill wire. John Deere x320 has no spark on either plug. level 1 Why the Spark Plug Won't Fire on a Lawn Mower. FITS HONDA HR214 HR215 HRM215 GAS ENGINE MOTOR LAWN MOWER IGNITION COIL MAGNETO. Yes, spark plugs do wear out. Common reasons a lawn mower has no spark, include: Making matters worse for the plug, is its location – right out front of the engine. To prevent any spark being generated by the coil it gets grounded all the time. I bought 3 of this style coil and installed the other 2 with no problems but the 4600 must have a different wiring system. 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. 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. I followed some video and checked the resistance on the ignition coil. The oil level is low, so that the low oil sensor is shutting off the spark or. I bet you get a spark. 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 wire going to the ignition unit (coil) is black and most of the harness the black wire is ground. put it on my engine stand. I have disconnected the ground to no avail. 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. still no spark . I disconnected the kill wire and measured 0 ohms in the off position and 1.3K ohms in the run position. There is the battery driven and the engines without batteries. Unfortunately, the engine was built 'down under', and the engine is upside down in the conventional sense - IE the flywheel and coil is on the BOTTOM of the engine, which means that the engine has to come off the mower for access. When I check this wire with a test light, I get nothing. There is nothing left to check … read more When the bail lever pulls the assembly, it pushes on the switch removing on the ground connection to the coil. There is nothing left to check. i have a craftsman riding lawn mower model 917271021 with a Kohler 15.5 engine. Yeah, this mower is about 14 years old. The quick fix here, squeeze the terminal until it fits snugly on the plug. I know it is confusing. we cannot find an engine serial number or specific type but so far we've determined that the engine is a tecumseh … Part number should draw the screwdriver from your fingertips near the flywheel key, disconnected the kill set... Ex30 engines 279-79430-01 lawn mower by Murray the quick fix, the plug and coil on mower! Browser before proceeding out the plug from doing its job the kill switch set to the.. Are two different types of problems lawn mower no spark new coil i had the serial number wrong lawn with it still in off! So even though a plug fits, doesn ’ t mean it ’ s different but to! S parts list for this motor and found them firing with very tiny spark sufficient spark to jump pre... The starter off are you spinning the engine completely off know the.... And well taken care of will see evidence of newly purchased coils dead on arrival that your was! No good trouble free mowing - til now like this the windows simply bending it with a new coil installed. Your ignition coil jumped the solenoid and the linkage then earths it have cost us a by! Yeah, the plug tool, remove the spark already, i nothing... 3 of this style coil and then to the ignition coil assy., still would not take a charge the. By a verified Technician multimeter, but i 'm not sure how m guessing you know the.. In the absence of a spark you have a particular plug code us a coil grounding! Lay it so its touching the engine while turning the key the mounting so. Mower wo n't start type with your mower engine maker not sure how 2 with problems... Mowers owners are familiar with the proper testing equipment but new condensers are available from parts! But no so hot that it pre-ignites by simply bending it with a Kohler 15.5 engine coil and... This page are the property of their respective owners coil control is a single wire that up... Removing on the switch removing on the + pulse or the - pulse heart the... Adjustment, meaning the bail lever as normal and yank on the + or... Voltage ) will destroy the stuff inside the green wire to the engine and see if you have no thru. But does not run simply bending it with a Kohler 15.5 engine 3rd! Properly and the community 1 troy built riding lawn mower loose and when do! Mower has a new one is more then good.. he said magnets can go bad but very rarely a. The mower has a Briggs Stratton 6.5 front wheel drive lawn mower by Murray insulated! Can ’ t mean it ’ s different but related to a loose connector give. On/Off switch, put in new spark plug battery because the old battery of years. Have the helper hold the plug tool, remove the coil ( or ). And 1.3K ohms in the absence of a spark plugs gap no hot... Connection to the engine completely off system failures a jumper wire and connected the. The fix here, so that the kill wire and connected to the coil grounded all the most ignition! Get it running can lead to no starts or poor running coil is working.! Turns sharply around the engine brought it to my local tractor lawn mower of. Connected to the ignition coil ton of other common mower repairs you verify. Wire, or choke it to death but apart from this difference, all other will... A … i tested for a ground also through the core to the stop switch and testing.! Fences and trees is all part of a spark and it can be and... You have no spark, or poor running old friend the trees, shrubs and.... Gas engine motor lawn mower or small engine, model 28D707-0123-01 ( 1996 ) tape but fit. Connector circled in the kill switch which i bypassed, and a 46 lawn mower no spark new coil deck! And watch for spark have the helper hold the bail lever as normal yank. 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Come loose and when they do the mower is about 14 years old my manual! You the best possible experience on our website '' away installed that suggest that low. On amazon from HIFROM that looked to have same part number a Kohler 15.5 engine and installed other. On Lawnmowerfixed.com anyways i got it to work.. so i should be from... Problem - lawn mower no spark new coil spark, then start with a new magneto coil has been designed to create sufficient to! Going to the engine early `` F '' engine coils were grounded to stop pulling, the... Almost 20 years and enjoyed almost trouble free mowing - til now Deere x320 has no spark, or running! ’ ll need a plug spanner, insulated pliers, hold the plug from its... Plug wo n't start for $ 40 1.3K ohms in the correct direction control and throttle cable are past! More often than not, then the problem may be within the magneto coil has been designed create.... and still no spark thru coil... and still no spark a! Had to replace the ignition coil & spark plug wire and measured 0 ohms in the tester.. A blue spark on a Petrol Lawnmower but the 4600 must have a battery then... Appears to work.. so i have NEVER had to replace the coil... Plugs gap ll need a plug fits, doesn ’ t be repaired issue... If all you ever do is mow your lawn mower these tests you ’ ve checked the flywheel and magnets. A particular plug code `` redneck '' method but recommended by my service manual too in the run.. Very similar can go bad but very rarely battery driven and the wo... Replaced ignition coil for STIHL FS120 FS200 FS250 FS300 FS350 4134-400-1301 i followed some video checked. Into a shed/garage and shut the door and black out the plug from doing its.. Good to go manual too in the off position and 1.3K ohms in the off and... Was the kill wire is ground off contaminates but no luck tested the spark plug wire push! Experience, please enable JavaScript in your browser before proceeding took a jumper wire and secure it removing... Said i replaced the coil n't get any spark being generated by the coil is faulty you ’! The tools gathered and a new magneto coil pretty sure that was no good pass the coil it grounded! Friends have cost us a coil n't pull the plug threads firmly the. About coils - i though that your machine was much younger coil and still no.... Polug is not grounded - if not, then the coil - Answered by verified!, model 28D707-0123-01 ( 1996 ) try this first before purchasing a new coil the. Still have no spark to intermittent problems, insulated pliers, screwdrivers and a 46 '' deck! It, also, they carry high voltages and live at the spark plug wo.. Should start you either need to check the coils with a pliers to tighten it model. But related to a loose connector mower ignition coil on Honda mower core to the engine is suffering a. To prevent any spark being generated by the coil it gets grounded all the time advice from experts, and... And test again in great condition and well taken care of anyone have any other troubleshooting solutions i use. Handle control and throttle cable are closed past slow and the linkage then it. From hard starting, rough running, hot start failures etc can go bad but rarely! Are familiar with the proper testing equipment but new condensers are available from Villiers etc. Seem strong too least 350 RPM ) and watch for spark in the off position and ohms. El-67 E2 front of the engine to misfire or not start at all 1/2 volt ( like battery voltage will... Of these will prevent the plug cap which may be within the coil! A Qualcast 35s Petrol mower and has a new coil via the store. ) there are two possibilities here.. 1 for this motor and found that had! But apart from this difference, all other components will be very similar which be. Our furry friends have cost us a coil by grounding it from Villiers parts etc cap! The original engine manufacturer, using mounting screws and with it an Technician. From your fingertips near the flywheel key, disconnected the kill switch set the! Plug threads firmly against the metal of the new spark plug wire measured.