Question about 1993 Harley Davidson XLH Sportster 883 Deluxe

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Weak spark magneto - 1993 Harley Davidson XLH Sportster 883 Deluxe

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Hi Anonymous, for more information about your question please visit the website below. Good luck and have nice day.
magneto Harley Davidson
http://www.hydra-glide.com/phpBB3/viewtopic.php?f=5&t=6755
The Jockey Journal

Posted on Jun 12, 2015

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Posted on Jan 02, 2017

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1 Answer

I installed a new magneto on my toro 6.5 gts lawn mower and still only get a weak and intermittent spark how do I correct this problem?


bob, i believe the magneto only charges the battery, if you have weak or intermittent or no spark i would look at the spark plug or the coil as the coil is what causes the spark. if plug is weak, the coil is bad or even the wire on the bottom of the coil. it is a ground. unhook that and see if it has spark. if it does the coil is your problem. good luck

Apr 22, 2016 | Toro Garden

2 Answers

Further to my question about a weak spark on my etq 1200 ,would one of these be the problem, magneto,igniter ir capacitor?


A lot small ignition spark appears to be weak when they are not.

A couple things to check. make sure your spark arrestor is clean and your ignition timing is correct; otherwords, that the flywheel key is not sheared.

Nov 25, 2014 | Eastern Tools & Equipment ETQ Tg1200 1200...

1 Answer

Very weak spark


You can use a match book cover thickness, of
card board between the coil & flywheel

The spark may look weak at the speed you turn it
over with the pull cord

May 24, 2012 | Mtd Garden

2 Answers

Id like to know if you can test your magneto without a multi circuit tester ? if i am getting spark, is my magneto still good? how do i read the numbers to know what year i in fact have ?


If you are getting a strong, blue, spark on a known, good spark plug, then the magneto is good. If the spark is weak (barely visible), then it is most likely the clearance or rust build up.

The easiest thing to do is check for rust on the surface of the magneto and the surface of the pick-up coil. Emery cloth is good for removing rust on both. Then check for the clearance between the pick-up coil and the magneto. The closer to the magneto, the more powerful the spark (but rotate the magneto to ensure it never touches). When you loosen the screws on the pickup coil to adjust, make sure you have a business card to place between the surfaces to keep them from touching. The strong magnet in the magneto will pull the pickup coil to itself. Tighten the screws and remove the business card. Check for clearance as you rotate the magneto.

The only thing that can go bad in a magneto situation is the pickup coil. So, if you're getting a spark, it most likely is not the pickup coil because it will either produce a spark or won't.

May 31, 2011 | Suzuki RM 250 Motorcycles

1 Answer

I have a brigs & stratton classic 35 engine 9d902-2022 e1 00032451 will not start it has a very weak spark could you please advise and could you also give me the gap measurement between the magneto and...


Hi John and welcome to FixYa, I am Kelly.
The gap between the flywheel and the coil is 0.0125. The easy way to set it is to get a pack of book matches tear out the matches and use the cover between the magnet and the coil then loosen the coil mounting screws allowing the magnet to pull the coil onto the match book cover. (This has worked flawlessly for 40 + years on literally hundreds upon hundreds of engines regardless of brand.)

Weak spark is caused by either a parasitic load on the kill wire or a bad magneto

Your parts list is here:
http://www.briggsandstratton.com/document/index.aspx?doc=MS4864_B_LO.pdf

If the control wire item 270 of the below link is fine / not grounding or chaffed. This little wire is notorious for grounding at the flywheel brake engine stop terminal and under the flywheel before the magneto.

http://www.partstree.com/parts/?lc=briggs_and_stratton&mn=09D902-2022-E1&dn=48640005A
then the most likely failure is a weak Magneto (Item 333 above)

Also make sure to check the high tension lead where it comes out of the air-shroud.

Lastly... use a phillips screwdriver in the spark plug cap making a small gap to the engine for checking spark. A bad spark plug can act like a resistor and show weak spark. HOLD THE HANDLE only on the screwdriver.

May 30, 2011 | Briggs & Stratton Garden

1 Answer

What would cause no spark? the mower is a masport 8/02 two stroke. Will not start and I have changed spark plug and cleaned every thing but still nothing.


Your spark plug wire may be damaged, or your magneto may be too weak to generate a spark. You also have a kill switch wired to your magneto, and a condensor. I would start by cleaning the contacts of the magneto and then check the gap between the magneto and the flywheel. The gap between the flywheel and magneto should be .010". I would start by checking the kill switch wire for damage. If any damage is suspected, replace the kill switch. Next, I would have the magneto tested or replaced. Also, check all your ground wires for damage, or loose contacts.

When you are checking for a spark, you should have the spark plug installed in the spark plug wire as normal, but not installed in the engine. The spark plug base should be grounded to the engine while trying to start and checking for a spark. If there is a weak spark, this is probably due to a worn magneto.

May 24, 2011 | Briggs & Stratton Garden

1 Answer

The coupling between magneto and engine broke, and


1) Check the points (inside the magnetor cover) and clean if needed.
2) It could be 180' out of time.
As you rotate the engine and come up to compression TDC, the magneto should trip or 'click' to start the spark. If that click is on the exhaust stroke, it is out of time.
*Magentos will make a very sharp bright blue spark, so points, condensor, and coil is very important.

Nov 23, 2009 | Electrical Supplies

1 Answer

My XR 1991 250r is just not kicking over,there is a very weak spark there,could the coil be faulty ?


no, the coil works or it don't work. Take a look at the magneto, check your gap on the spark plug, and check the magneto and see if it is rusted. Your spark plug wire might also be cracked.

Jun 30, 2009 | 1991 Honda XR 250 R

1 Answer

Weak spark on 55 rancher chain saw/ airgap on magneto


the air gap is .010 to .012 inches,hope this helps, if not contact me and i'll help you with anything i can

Mar 12, 2009 | Husqvarna Chain Saw 20" Bar

1 Answer

Crf100 has a weak spark


its the coil or magneto one of these two will cuase a weak spark they are simple to replace though

Dec 30, 2008 | Honda CRF 100 F Motorcycles

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