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For a better experience, please enable JavaScript in your browser before proceeding. Stihl Ignition Module Air Gap Thread starter Nicholas Start date Jun 12, Jun 12, Nicholas ArboristSite Operative. Good morning everyone, I have a question regarding the ignition module on my magnum II.

According the the shop manual I have, a person is supposed to insert the Stihl setting gage which I have between the ignition module and the flywheel magnets. Next, a person is suppose to push the ignition module against the setting gage, and flywheel magnets while torquing the torx screws to 9 newton meters. Next, the shop manual says to remove the setting gage, and measure the resulting air gap which is 0.

Sounds easy enough. Here's the problem, the stihl setting gage seems to set the air gap too tight, like 0. It seems as though the center coil pick up on the ignition module has a wider air gap. Now my question, what is the proper way to measure an ignition module air gap?

Shall a person measure the gap between the flywheel magnets and the ignition module arms? Please enlighten me, I am a bit confused Any help would be greatly appreciated.

trimmer ignition coil gap

Thanks, Nicholas Gajewski.Trimmer out of whack? It's time to face the fix. Whether you are a legendary landscaper or a weekend weed whacker, eReplacementParts.

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Does your engine shut off randomly? Does it seem to shut off whenever it gets hot? If so, you might have a bad ignition module. The ignition coil, along with the flywheel, create the electric charge for the spark plug. The most common mistake when diagnosing an ignition coil is to test it by removing the spark plug, and grounding the plug to the engine to test for spark.

The spark plug operates in a pressurized environment inside the cylinder; much different from the ambient air outside. To recreate what happens inside the cylinder, you will need to use a spark tester. A tester with an adjustable gap is best, as it will allow you to stress the coil by increasing the width of the gap, which forces the coil to create more power to jump it.

Let's get started. Remove the rear motor housing. Remove the screws securing the rear motor housing to the engine. Remove the rear housing from the engine. Remove the shaft and handle assembly.

trimmer ignition coil gap

Remove the 4 screws securing the shaft and handle assembly to the engine. Separate the shaft and handle assembly from the engine. Bind the engine this is necessary to remove the clutch drum. Disconnect the spark plug boot from the spark plug.

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Use a spark plug wrench or socket to loosen the spark plug. Remove the spark plug from the engine.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up.

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I did a compression check by pulling the pull starter and the compression seemed good. Next I pulled the spark plug, put it back on the boot, grounded it to something metal. I then pulled the cord again and saw no spark.

I kept doing this and some times I'd get a very weak spark, but most of the time I'd see no spark at all. I haven't had time to look at it again for a few days, but I will be pulling it out again probably tomorrow.

String Trimmer Ignition Coil Replacement #545046701

What things would you check and in what order? There's a good YouTube video that shows how to replace a lawn trimmer ignition coil. Your model may vary, but the procedure will be similar. The ignition system is made up of 3 major parts. A magnet located on the flywheelan ignition coil, and a spark plug.

When you turn the engine pull the cordthe flywheel rotates. When the magnet on the flywheel spins past the ignition coil, a current is induced. This current travels through the ignition wire to the spark plug. The electrons want so badly to return home groundthey jump the gap in the spark plug.

As they jump, they produce an electric arc also known as a spark. This arc ignites the fuel air mixture in the chamber, and the trimmer starts. On top of Tester's excellent answer, here are some quick and easy ways to get it working without going through the trouble of replacing the ignition system or buying special diagnostic tools.

Take a bit of fine sandpaper and try to rub the grime and dirt off of the spark plug. Give it a little bit of a shine and try again. You can also try a small amount of carb cleaner, but just let it dry out before attempting to start it again.Forums New posts Search forums. What's new New posts New media New media comments Latest activity. Media New media New comments Search media.

Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter CaptainBarnacle Start date May 3, May 3, CaptainBarnacle New Member.

After years of reliable service I took it out last September and I just couldn't get the thing to fire up at all. I finally got around to taking a good look at it today and stripped it down to try and fix it.

trimmer ignition coil gap

After reading a bit about what the problem could be I went through these steps: Disconnected the switch to rule out faulty switch - no difference.

Check the gap between the flywheel and ignition coil - it looked OK but I set it again using a business card as a spacer. Remove the plug and check for a spark on the plug whilst grounding the body of the plug and cranking the starter - no spark. Replaced the plug with one that I know to work from my Stihl chainsaw - still no spark. Removed the plug completely and stuck a steel rod in the spark plug boot. Made sure there was a gap between the rod and the engine body and cranked - no spark. Checked continuity between the plug boot and the two terminals on the ignition module - no continuity between any two of those three points.

At this point I was all set to go and buy a new ignition module but I though I would try putting my Fluke multimeter on the plug boot to see if there was any voltage when I cranked.

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I set it to record the min and max voltages. When I did this the Fluke showed the max voltage as OL over limit, overload??

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So now I am not so sure that the ignition module is broken. So my questions are: 1. Typically what sort of voltages does the coil supply to the spark plug? Am I doing something wrong in my testing? Are there any other tests that I can do to help determine where the problem is?

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Should I just get a replacement ignition module? Thanks guys, Paul. An ignition needs a minimum of volts or so to jump the gap. I would not use you nice Fluke meter for spark testing. It won't work for that purpose and will get fried. Instead get a spark test tool for small engines that looks like a spark plug and clamps to ground.Compression should be at least pounds to even start, it will not run properly at that amount though.

On a "broken in" machine would be perfect. Unfortunately due to the EPA regulations I can not legally post the carburetor settings or even how the adjust them. There is a hefty fine for giving this information out.

You would need to have an authorized service technician do that adjustment. Contact Us. This site requires JavaScript to function properly. JavaScript is either disabled or not supported in your browser. Try enabling JavaScript in your browser and then refreshing this page. String Trimmers. I have a Trimmer Husqvarna LD could you send me the coil Answered escalated.

I have a Trimmer Husqvarna LD could you send me the coil gap specs,compression specs and proper adjustment for the carburetor thanks. Be the first to rate this. Best Answer posted April 13, by Greg P. Hi, Audie Thanks for contacting the Answer Army to post your questions. Ignition coil gap is. Thanks again from the Husqvarna Technical Services Team. Terms of Use Privacy Policy.When you pull the starter cord to fire up your Stihl trimmer only to find that there's no response from the machine, the ignition coil may require adjustment.

Another sign that the ignition coil is malfunctioning is a machine that runs erratically. If the ignition coil isn't properly spaced, it can be difficult or impossible for the spark to ignite and start the machine.

Fortunately, adjusting the ignition coil, also known as spacing or setting the gap, is a task almost any homeowner can perform. Remove the outer housing cover from exterior of the trimmer so you can access the spark plug and inner workings of the trimmer. Lay the housing and screws aside for replacement at the end of the adjustment.

Disconnect the spark plug wire from the spark by pulling off the boot by hand. Ensure that the boot cannot inadvertently reconnect with the spark plug until you're finished with the adjustment.

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Turn the screws that hold the ignition module in place to the left to loosen the module. Do not remove them completely. Simply adjust them to the point where you can wiggle the module a bit. Rotate the flywheel manually until the magnet aligns with the ignition module. Insert the spacer card -- or a thick business card in the absence of a Stihl spacer card -- between the flywheel magnet and the arms of the ignition module.

Tighten the screws that hold the ignition module in place with the spacer card still in position. When finished, slide the card from between the flywheel and ignition module. The card should slide out easily with mild resistance. Reattach the spark plug wire to the spark plug. Reposition the outer housing on the machine and reinstall the screws that hold it in place. Amie Taylor has been a writer since Book reviews, gardening and outdoor lawn equipment repair articles and short fiction account for a handful of her published works.

Taylor gained her gardening and outdoor equipment repair experience from working in the landscaping and lawn-care business she and her husband own and operate. Skip to main content. Home Guides Home Home Improvement Home Maintenance When you pull the starter cord to fire up your Stihl trimmer only to find that there's no response from the machine, the ignition coil may require adjustment.

References 2 eReplacementParts. About the Author Amie Taylor has been a writer since Accessed 11 April Taylor, Amie. How to Adjust the Ignition on a Stihl Trimmer. Home Guides SF Gate. Note: Depending on which text editor you're pasting into, you might have to add the italics to the site name.With proper maintenance, even an old chain saw will allow you to cut firewood for the winter.

When you have an old classic chain saw like the Homelite XL model, chances are you're going to have to perform maintenance and repairs on it from time to time to keep it up and running. When you've replaced the old ignition coil with a new one, it's crucial that you set the ignition coil gap distance correctly in order to ensure the machine will fire up and run like it should.

Every time you pull the starter cord of your Homelite XL, the flywheel turns rapidly in response.

Stihl Ignition Module Air Gap...

The spinning flywheel contains a magnet that aligns with the ignition coil and creates a spark that connects with the spark plug and ignites the fuel and air mixture in the chain saw. When the gap between the spark plug and the ignition coil, also known as an air gap or coil gap, is too wide or too small, the chain saw will refuse to start.

When you have an older chain saw like the Homelite XL, it's possible that your operator's manual may have become lost or damaged somewhere throughout the years, preventing you from consulting it to learn the figure for the correct gap.

Homelite advises that the gap between the ignition coil and the flywheel must be set anywhere from. If you've not replaced the ignition coil recently and your machine won't fire up, it may be possible that you simply need to check the gap and reset it if necessary. Before setting the air gap on your Homelite XL, take steps to prevent accidents from happening.

Disconnect the boot that's connected to the spark wire from the end of the spark plug. This will prevent accidental starting of the machine. Empty the gasoline from the tank into a plastic container to prevent spillage or leaks during the repair. Always allow the machine's engine to cool completely if you were using it prior to making the repair. Since an accurate air gap is so essential, the best thing to do is measure the gap with a feeler gauge.

Feeler gauges can be purchased at most automotive parts stores. Feeler gauges typically come in sets of 12 to 32 blades connected together at one end, each one a different thickness. Select the gauge that is.

Amie Taylor has been a writer since Book reviews, gardening and outdoor lawn equipment repair articles and short fiction account for a handful of her published works. Taylor gained her gardening and outdoor equipment repair experience from working in the landscaping and lawn-care business she and her husband own and operate.

Skip to main content. Home Guides Home Home Improvement. Home Guides Home Home Improvement With proper maintenance, even an old chain saw will allow you to cut firewood for the winter.


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