Question about Briggs Stratton IC Horizontal OHV Engine 305cc 1450 Series 145 Gross Torque 1in x 3 2132in Shaft Model 2053320537B1

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Can,t get voltage to spark plug. Checked condensor and points and they are both ok. How do you check the coil ? I,ve tried with a ohm meter but I,m not sure what I should get as far as readings on the coil, spark plug wire to other side of coil and point setting. Any help would be greatly appreciated. Thanks Gary.

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Hi Garry,

One of the points should connect to the coil and the other to ground, With the points open and the kill switch for the engine off i.e. open circuit, measure the resistance from ground to the other end of the coil which is connected to the points. If this is infinite, the coil has gone open circuit or is not grounded properly. Normally the resistance should be a couple of ohms falling to near zero as the points close. If the resistance doesn't fall, check the points aren't dirty or corroded. they can be cleaned with fine sandpaper and IPA but dont overdo it as the points are given a coating to resist arcing and this can be worn away if you rub too hard.
Try a new spark in case this is the problem.
Possibly the spark lead isn't making contact with the end of the plug in the spark plug booth.
Check the kill switch for the engine isn't shorting out the coil, it should be open circuit when the engine is running.

Posted on May 28, 2011

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1 Answer

How do I check the coil on my 8n to verify it is OK?


A digital multimeter is required for testing the resistance levels of the ignition coil. The terminals of the coil are going to be marked "negative" and "positive," and these are the two points where the resistance of primary winding can be measured. Step 1: Prepare the multimeter
To check a 12 volt coil, set the multimeter to at least a 200 Ohms setting. Attach both leads of the meter to the coil-terminals with black to the negative terminal and red to the positive one.
Step 2: Test the resistance
The normal, acceptable range for a standard 12-volt car is 1.5 to 1.7 Ohms. See if the reading is within this range.
Step 3: Test the secondary coil resistance
Set the meter to 20K Ohm setting, and attach the leads to the ignition coil's center terminal. The reading for secondary-coil resistance should be 11, because if it is lower, that's the reason why sparks are not appearing

Oct 19, 2016 | Cars & Trucks

1 Answer

I got fire to my points on my 4 cylinder 1932 ford but not to my plugs what's wronghat wrong


Could be a bad coil. Check its resistance and compare to specs (find some real old mechanic to tell you what specs to expect, if you have to-lol). Also could be a bad high tension lead from coil to dist. cap-can also be checked for too much resistance.
Do the points open and close when engine is cranked? Are they set right-about 0.015 inches- or two matchbook covers placed together? If coil and high tension cable are good, and points are good and set right, the condensor that goes with the points may be bad-try a known good one-I'm assuming that old car has a condensor to trap the current when points open so no sparks at points occurs.
If everything checks out so far, maybe the distributor rotor is not making good contact to transfer the high voltage current from the coil cable to the spark plug wires.

Mar 18, 2013 | Cars & Trucks

1 Answer

MY 1969 YAMAHA ENDURO WONT GET SPARK OR FIRE IVE CHECKED EVERY THING I NEED SOME TIPS FAST


Fisrt check the plug and plug cap. Remove this and see if you have spark from the HT wire.
Check points are clean and points gap and make sure the wire is not shorted out and you have spark there.
If not, remove the HT coil wire and condensor wire and check for spark at the points again.
If you have spark then the bottom coil is ok and then connect the condensor wire and check again.
Connect the HT coil wire after checking no shorts and if you have spark at the points and still none at the HT side then your coil is probably faulty.

Jul 06, 2011 | 1974 Yamaha DT 360

1 Answer

I own a 1976 hd sporster ironhead 1000 engine turns over but does not fire.


Pull one of your spark plug wires off and put another spark plug in it. Ground the plug against the head. Turn the switch on and then back off while watching the plug. You should see a single spark. If your bike is still set up with the original points type ignition system, you may simply need a new set of points installed in it. You also need to check the mechanical advance unit behind the breaker plate that the points are mounted to. Make sure you mark the position of the breaker plate before you take it out in a manner so that you can reinstall it back in the exact same position. To test the coil, disconnect the two small wires on either end of the coil. Using a digital volt ohm meter, set the meter's function selector switch to R X 1. Put one of the meter's probes on each of the small terminals, Your meter should read between 5 and 6 ohms. Reconnect the white or blue wire to the coil. Turn the ignition switch on and check the voltage. You should have battery voltage at the coil.

Good Luck
Steve

Jul 02, 2011 | Harley Davidson XLH 1000 Sportster...

1 Answer

I have a 1972 yamaha 360. it had ran 1 min when i first got it, then died. fiddled around a bit and got it to run 30 seconds then died again. checked for spark none existent. clean points, ground...


Hi, Greener_dude nice novella and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
DT360 NO SPARKLETS Vintage Enduro Discussions
How to fix No Spark Problem on Motorcycles and Dirt Bikes
DOWNLOAD NOW Yamaha DT250 DT360 DT 250 360 Service Repair Workshop Manual... $15
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-dt

Apr 06, 2011 | 1972 Yamaha DT 360

1 Answer

1999 sportster sport will turn over but will not start changed signal lights on it and will not start act like no fire but havent checked yet was wondering if there was a fuse block for this model


Yes there is a fuse blow or a circuit breaker block on the bike. It's either under the seat or behind the triangular plate on the left side of the bike. Usually, the ignition circuit in on a different circuit from the lights.

Take a test light or a Volt Ohm meter and check for voltage on the coil. To test the coil, unplug a spark plug wire and insert another spark plug in it. Make sure the plug is grounded to the engine. Turn the ignition switch on and then back off. The spark plug should spark once when you turn the switch off. If not, you either don't have power to the coil, or the coil is bad.

To further test the coil, disconnect all wires from the coil and connect a DVOM (digital volt ohm meter) across the coil. Connect one lead from the meter to one of the small primary terminals and the other meter lead to the other primary terminal. Put the meter's function switch in OHMS, R x 1 scale. You should read 2 to 3 ohms, no more or less.

Good Luck
Steve

Nov 22, 2010 | 2000 Harley Davidson XL 1200 S Sportster...

1 Answer

My 72 sportster is getting power to the coil but no power to the terminal leading to the points. Any advice?


Well, power only comes in from one side of the coil and if the points are closed, your meter will not read voltage on the other side. Make sure the points are open when checking for voltage.

To check the coil's primary circuit. Take all wires loose from the small terminals at either end of the coil. Using a DVOM (digital volt ohm meter), put the meter in OHMS, R times 1 scale. Connect one meter lead to each terminal of the coil, make no difference which one goes where. The meter should read between 5 and 6 ohms of resistance. If it reads "Infinite" the coil is open and if it read "Zero" the coil's primary circuit is shorted.

The easy way to test the coil is put a spark plug in the plug wire and lay it on the head. Make sure it has a good ground. Turn the engine over until the points are closed. Turn on the ignition switch and use something to open the point. Each time you open the points, you should see a spark at the plug. If not, you've probably got a bad coil.

Good Luck
steve

Aug 06, 2010 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

Have 10 hp Tecumsa engine and can not get ignition spark from plug. Have new spark plug, cleaned flywheel & coil with emery cloth. Have checked on/off switch for continuity. Can ignition coil be tested...


Did you check, that the magnet is on the flywheel.
When you cleaned the flywheel, did some metal rasping gather around it.
The magnet should be strong. A small steel instrument will be pulled by it.

The high voltage coil can be tested for resistance with an Ohm meter. The resistance may be some kOhm but not MOhm. If MOhm it should be replaced.

If the coil and magnet are OK, and well attached to the flywheel and aside with a minimal air gap, then the coil may be checked by turning the flywheel. As the voltage on coil ends when magnet passes by the coil should be very high, the only way for checking is with a spark plug, connected to the checked high voltage cable, the thread of the plug well connected to motor case. A spark is the prove that it is OK

Check also the HV cabel and the connection of other coil end to motor case.

I hope that this will be helpful, because I don't have your device in front of me. Some people rank such an answer with 2 thumbs (meaning useless). Better don’t rank.

Jul 28, 2010 | Coleman Powermate Premium Plus 6250W...

2 Answers

Taking coil of the engine on snoblower toro 8/32 briggs/stratton I don't have the manual for this engine and i need to replace the coil but there is a wire that i have to unplug but it seems to go inside...


that wire goes to under the flywheel which goes to the condenser and points which is probably the problem in the first place the condensor goes bad first before the coil very seldom does the coil go bad few bucks for a condensor and points comparred to big bucks for a coil you have what they call conventional points and condensor not electonic ignition but you can just buy a new electronic ignition coil and just yank the wire from under the flywheel then put your kill switch on the new coil set your gap with a business card from the magnet and the coil and your set

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