May 2, 2019 at 6:32 pm #174708
so ipreviously posted that i need new plug wires they came in put them on and i get intermitten spark on the top cylinder…some times i get spark at low rpm but once i hit quarter or above spark goes away..now after swaping everything from good side to bad except coils i get spark every so often but mainly top cyclinder is dead…coil looks brand new…any help would be appreciated.May 2, 2019 at 8:01 pm #174718
clean the points and adjust again
coils look new means not very much if they are old they may arc to the mag plate get new ones if unsure
the cheap one work for me… go to eBay USA for U$$$
US Member - 2 Years
Topics: 62May 2, 2019 at 10:39 pm #174729
Be sure that upper spark plug wire is fully inserted in the coil as far as it will go so spark can’t leak out to surrounding metal. Also be sure the spark plug wire is absolutely clean where it goes into the coil . Spark will follow dirt and grease to any ground metal.
DaveMay 2, 2019 at 11:04 pm #174731
i cleaned and adjusted pionts about hundred times..plug wire is all the way in cant screw it any tighter…wires are new..i might swap coils see if it moves to lower cylinder if it doesnt i’m going to be amazed…could pionts be arching out on that side..everything was replaced 3 years ago when i bought it except plug wires wich i just changed.stranded copper 7mm wire..
Canada Member - 1 Year
Topics: 10May 2, 2019 at 11:06 pm #174732
I didn’t read your other post… Are you using good plugs? I’ve had a defective new plug give me similar issues before on an atv. Swapped out the plug for another confirmed good plug and all was solved.
A little information is a dangerous thing!May 2, 2019 at 11:45 pm #174735
test for sparks without a sparkplug …just insert a screw backwards in the boot and hold hit near the frame .5 inch it should jump or use a air gap spark tester
try running the engine in the dark…. look for jumping/arcing high voltage along wires etc…
test the magnets to see if they hold or pull hard on a screwdriver
what is the ohms readings on the HV secondaries between boot and frame ground (wiggle boot clip while testing you should read 4-7Kohms depending on coil type)
try adding a test ground wire between the mag plate and the engine body creating a good return path for the HV
if you have spare condensers swap out the one on the top set of points ….. if not interchange the condensers since the bottom one is known to work ok
keep (tuck) coil wires away from rotating shaft
clean points with an acetone/carb cleaner wetted business card
Canada Member - 2 Years
Topics: 2May 3, 2019 at 1:01 am #174740
Check to see if your coil heel is hitting on the flywheel .magnetMay 3, 2019 at 9:15 am #174743
nothing hitting…switched condesores still same problem…plugs arew 3 years old but good..i used an inline spark checker spark goes away at just off high idle…going to switch coils see if problem moves to lower cylinder…and i will test coil..as for cleaning pionts i use 600 grit sand paper clear clean..set at 20 thou..when it is working at idle i tested spark strength had spark arching out to about half inch before it would start to break up.May 3, 2019 at 9:48 am #174744
seems that the most “variable” elements here are increased vibrations & the points (assuming good coil, condenser , plug wire, booth and sparkplug)
have you checked for arcing , tried new points , grounded the mag plate , clean and repunched the plug clip , measured the HV secondary resistance with coils in placeMay 3, 2019 at 10:12 am #174747
so i took coil off and tested it on my meter…i’m getting 03.3 when touching the green and black wires and nothing when touching each wire and the coil output.so i’m guessing i need a new coil.May 3, 2019 at 10:43 am #174764
primary should be very low resistance few ohms…at best does your 03.3 mean 3.3 ohms ???????????? please reconfirm
ground wire to secondary HV pin should read around 4-7 k ohms… make certain you are using & reading the proper scale compare both coils secondary if made by the same manuf. coils should be close in ohms readings
in any event the secondary should NOT BE OPEN which could…allow some sparking but indicates a broken winding … not good imhoMay 3, 2019 at 11:54 am #174767
um i got a fluke meter digital set to ohm..when i touch positive to the green wire and black to the black wire i get any where from 01.2 too 10 it reads diff every time i do it…now if i wiggle the green wire and put the negative wire from meter on the coil output i get reading from nothing too 1.234 up to 20 then slowly goes down too around 1.5 same if i touch the red wire from meter to black wire on coil and black wire from meter to out put on coil it just bounces aroundMay 3, 2019 at 12:03 pm #174768
dissregard that lol i get no reading i was acidently touching the leads with my fingers and was getting a reading…i do not get any reading when i touch red wire from meter to grenn wire on coil and black wire from meter to coil out put..but i do get a reading of 01.0 too 01.1 if i touch red wire from meter to green and balck wire to black wire on coil
US Member - 1 Year
Topics: 47May 3, 2019 at 12:18 pm #174769
Secondary is open (NG) assuming you have your meter set to a suitable range to measure a few k-ohms.
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