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No spark at the plug. testing of the coil and reassembly

Does not start. no spark at the plug.how to test the coil or has it to be replaced and the correct procedure to replace the coil.

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  • Contributor
  • 31 Answers

You can go to Ehow.com sometimes they give good advice or will direct you. Might want to check the kill switch.

Posted on Jun 17, 2014

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

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  • 6 Answers

SOURCE: ryobi 825r 4 stroke grass trimmer fires momentarily then stops.

I would say try adjusting the carb screws further out,or start by winding all the way in then out 1,5 turns.

Posted on Mar 24, 2009

mrrichardlbo
  • 59 Answers

SOURCE: No Spark

put the kill switch back frist using a test light you can check for spark your coil is set @00.8tm..... good luck

Posted on Aug 15, 2009

  • 202 Answers

SOURCE: No Spark - Husqvarna 125R Trimmer

Check the wire that goes to the "OFF" button. See if it is by chance loose or cracked allowing a short. Beyond that, it would probably be the coil, but I would lean towards some type of a short, especially if you know the plug is OK.

Posted on Jan 10, 2010

hunter19_46m
  • 7482 Answers

SOURCE: Won't start. Replaced spark plug. Cleaned air

Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
buy and install a new carburetor repair kit, because the diaphragm will
get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please rate me, Thanks
Good Luck, I hope this helped

Posted on May 15, 2010

rycgl
  • 1545 Answers

SOURCE: weed trimmer wont start, spark

The timinmg is preset by the permanent keyed slot built into the inside of the flywheel where it mates with the crankshaft. If the key was broken off, you would get No spark because of the nature of the magneto ignition. Your compression is actually pretty low for a 2 stroke. It should run higher like around 90+. Try this. With plug removed, cover plug hole with thumb and give the pull start a real strong pull. It should push your thumb off of the hole. If it doesn't the compression is too low for the engine to run. Scored piston walls, or cylinder walls could be the problem. Again 60PSI is really low. I would remove the jug and check for piston scoring and cylinder scoring. The engine can be easily rebuilt (but not real cost effective).

Posted on May 25, 2011

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1 Answer

No spark on a 2000 blaster


Plugs, wires, or coils. Those are your options. Replace the plugs. They could be fouled and not even look like it. Check the wires for cracks abrasions or scorch marks. Test ohms and continuity of the coils with a multimeter and then compare them to specs in a FSM. Remember to use dieletric grease when you reassemble everything.

Oct 28, 2014 | Motorcycles

1 Answer

2003 crv will start but stalls. replaced fuel pump/spark plugs/ignition coils. 2 center spark plugs has a strong spark but 2 far end left and right do not have a spark. pls advice...thxs.


Do a cylinder contribution test
Do a cylinder combustion test
Do a cylinder leak down test-that is the best one to do
Do at least a compression test

Any of those may point you towards
failed valves, that no longer seal,thus
the dropped cylinders & misfire or no fire

Wires on correct coils?

Oct 04, 2014 | 2003 Honda CR-V

1 Answer

BIKE RAN GOOD BUT HAD BACK FIRE ONCE IN A WHILE REPLACED COIL RAN GOOD FOR 100 MILES SHUT IT OFF NOW HAVE NO SPARK TO PLUGS


Could be an ignition module. Check the coil first.

Check your pick-up sensor located inside the timing cover, behind the adjustor plate. If the filament is not intact you will have no spark.
A defective coil, cam position sensor, or stator will also cause a no spark condition.

First check for diagnostic trouble codes (DTCs). THEN check the condition of the battery and do a voltage test
and recharge the battery if it is below 12.60V. THEN check the condition and tightness of the battery connections
and perform either a conductance test or a load test and replace the battery if and as necessary. THEN remove the spark plug cable from one of the spark plugs and remove the plug and visually check the condition of the plug. THEN attach the HT cable to a SPARK TESTER and clip the tester to the cylinder head bolt and crank the engine over looking for spark and repeat the procedure on the other cylinder also. Be aware that the Engine will not spark with both spark plugs removed, so when checking for spark, use a SPARK TESTER with both plugs installed.

Ignition Coil Primary Circuit Test
Remove the coil. THEN set your ohmmeter scale to RX1 and place ohmmeter leads on the primary coil windings A (front of coil) to B (middle of coil), B to C (front of coil) and check for primary coil winding resistance which normal resistance range is 0.5-0.7 ohms. If primary resistance is not within this range check out test results below.

Ignition Coil Secondary Circuit Test
With the ignition coil removed from the motorcycle and the ohmmeter set to the RX1K scale place the ohmmeter leads on the secondary coil windings B (middle terminal) to
R (rear secondary terminal/socket), B to F (front secondary terminal/socket) and check for secondary coil winding resistance which normal resistance range will be 5.5-7.5K ohms. If secondary resistance is not within this range check out test results below.

Test Results
A low resistance value indicates a short in the coil winding which requires coil replacement.

A high resistance value might indicate that there is some corrosion/oxidation of the coil terminals requiring the coil terminals to be cleaned and the resistance test then repeated and if after the test is repeated the resistance is still high after the terminals were cleaned the coil must be replaced.
If there is an infinite ohms or no continuity) resistance value the coil is open and must be replaced.

May 13, 2014 | 2001 Harley Davidson XL 1200 S Sportster...

1 Answer

1998 gsxr 600 no spark


Instructions

Verifying the Spark
1

Remove the upper and side fairings, using a 4 mm Allen wrench to unscrew the fairing bolts. Unlock and remove the rider's seat, using the ignition key.
2

Pull the fuel lines off of the fuel valve under the left side of the fuel tank. Unscrew the pair of bolts from the base of the fuel tank, using a 10 mm socket. Pull the fuel tank to the rear of the motorcycle to remove it..

3

Pull the cables off of the two spark plugs on the right side of the motor. The spark plug cable furthest to the right is connected to the right ignition coil, while the second cable is connected to the left ignition coil. Unscrew the spark plugs from the motor, using a spark plug socket. Plug the ignition cables back onto the removed spark plugs.
4

Hold the spark plugs against the motor and start the motorcycle for a few seconds. Observe the gap between the electrode at the tip of both spark plugs for spark. Ideally, the spark should have a bright, blue appearance.
5

Replace the spark plugs with new DR8E spark plugs, if no spark is present. Repeat the test. Replace the corresponding ignition coil if there is still no spark present at the spark plugs' electrodes.
6

Proceed to Section 2 for further diagnosis, or reassemble the motorcycle following the reverse method of removal.
Testing the Windings
7

Remove the suspect ignition coil from the motorcycle's frame, using a 10 mm socket. Unplug the coil's cables from the remaining spark plug in the motor and from the spark plug removed in Section 1. Unplug the motorcycle's wiring harness connector from the back of the ignition coil. Remove the remaining ignition coil, if needed, using the same procedure.
8

Set your multimeter to read an R X 1 resistance range, using the meter's settings dial.
9

Measure the ignition coil's primary winding at the terminal that connects to the motorcycle's wiring harness, using your multimeter. Touch the meter's red probe to the coil's positive (+) terminal and the black probe to the coil's negative (-) terminal. Take note of the measurement on the meter's display. Replace the ignition coil if its primary winding has a resistance measurement less than 3 ohms or greater than 5 ohms.
10

Set your multimeter to read an R X 1,000 resistance range, using the meter's settings dial.
11

Measure the ignition coil's spark plug cables, using your multimeter. Touch the meter's probes to the metal connectors within the cable's end caps. Take note of the resistance measurement on the meter's display, indicated in ohms. Replace the ignition coil if the cables have a resistance measurement less than 25,000 ohms or greater than 45,000 ohms.
12

Reinstall the ignition coil if its primary winding and spark plug cables are within the specified resistance range, using the reverse method of removal. Replace the entire ignition coil if either the primary winding or the spark plug cables are within specification, as the ignition coil and its cables are a combined assembly.
13

Reassemble the motorcycle following the reverse method of removal. Connect the left ignition coil's cables to the pair of spark plugs in the middle of the motor's cylinder (#2 and #3), while the right coil's cable connect to the spark plugs on the sides of the cylinder (#1 and #4).

Jan 11, 2013 | 1998 Suzuki GSX-R 600

1 Answer

NO START, trouble code p1351


Nice job in the details except for the make model and year.

Feb 26, 2017 | GMC Sonoma Cars & Trucks

1 Answer

I have a Powermate Generator which I bought about 3 years ago from Lowe's. I start it up and run it every few months. Now it will not start. I took the magneto off and cleaned the inductor magnet in...


Remove all the wires at the coil and retest. Good idea to use a new plug for testing or insert metal into plug cap and then hold close to metal of engine. If still no spark, remove the coil and take to small engine shop for free test (may have been damaged by heat if it was making contact with flywheel). I use a growler to test the coil. If retest produces spark, most likely faulty oil sensor. Remove the wire from oil sending unit. Dont replace the oil sending unit, just check oil often.

Sep 09, 2011 | Briggs Stratton IC Horizontal OHV Engine ...

1 Answer

WAnt start


first make sure good gas in in the unit as well the fuel is flowing to the carb if this is ok pull the spark plug and ground the side to the block make sure you don't have any gas spilled.
turn the run switch on if it has one and crank the engine you should see a spark if you do then back to the carb you may need to disassemble it and rebuild kit the carb and check if the float is not stuck this is common if the unit sits a wile with gas in them the best was to prevent this from happening gain is to run the unit with the gas off till it stalls and no gas is still in the carb.
if you don't have a spark then you will need to check the kill wire and the low oil switch wires to make sure they did not rub and ground out when thease wires ground it will prevent the engine from running.
if they look ok remove the pull starter cover you will see a flywheel and on the top their will be a coil that the spark plug wire leads it will be black their will be another small wire as well ether orange , red, or black some will have a small tab for a plug check the wires from that point depending on the age their some models that use a solid state module and the small wire will be a kill so ther cant be grounded is it is repair and rotate the flywheel with spark plug removed and grounded look for a spark if so this issue will be fixed and reassemble unit and test run in it is older and has a point system you will need to remove the flywheel and replace the points or repair electrics under the fly wheel check the fly wheel key-way as well if damaged replace.
when done test for spark again if fixed reassemble test run if still no spark check the low oil sensor a one wire then just clip the wire and test spark if spark their then replace the low oil sensor or leave undone check oil regular. reassemble run if still no spark then you have a bad coil module and it will need replacing but this is rare hope this helps

Aug 06, 2010 | Coleman Powermate Portable Generator...

1 Answer

I have no spark at the plug on my k301T.I do not know if my coil is good or not.Is their a way to test the coil?


First be sure you have a new/ known good spark plug. Spark testers are much more reliable if you have one of those.
To test the coil remove the ground wire from the coil. This would be the only wire that plugs into the module. Then reassemble the starter and check for spark again. If there is spark then the module is good and you have a switch or wiring problem. If there is still no spark then the module is bad and needs to be replaced.
Dont forget to reattatch the ground wire or it will be difficult to kill the motor once you get it started.

Dec 28, 2009 | Garden

1 Answer

02 cavalier with no spark on cyl 2 and 3


did u replace the wires? You might have power but a bad connection to the spark plugs or just bad spark plugs. just a thought

Aug 17, 2009 | 2002 Chevrolet Cavalier Coupe

1 Answer

Not getting spark


Testing the coil packs.

1. Get an INSULATED wire and hook it to a ground on the car.
2. Get some one to help you
3. pull a spark plug wire off the coil
4. hold grounded wire close to, but not touching, the part where the spark plug wire connects
5. keep hands away from coil and have your helper turn the engine over ( start car and turn off)
6. if there was a spark between the wire and the coil pack it is good. if not, the coil pack needs replaced
7. replace the spark plug wire
8. test the rest

Apr 22, 2009 | 2003 Mitsubishi Galant

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