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Magnets have come of under flywheel and broken coil

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This is the magneto for the park,must by new

Posted on Nov 18, 2009


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NO FEELER GAGE REQUIRED! Read through these steps first and get the concept in your mind before you proceed.

  • Remove coil wire from sparkplug if attached. ( always the first rule!) Verify there are no metal shavings or rust stuck to the flywheel magnet. ANY SUCH will prevent operation!
  • Loosen the screws of the coil so that it is snug but moveable and place the coil and flywheel magnet in direct alignment,
  • Secure a sheet of notebook writing paper.
  • Cut the paper so you have 3 layers of paper the width of the edge of the flywheel.
  • Move the loosened coil away from the flywheel and place the 3 layers of paper in the gap with no metal touching.
  • Allow the coil to fit up to the magnetic field.
  • Gently pull the flywheel toward the coil to allow for any clearance or wear in the flywheel bearing.
  • Verify the coil is still snug to the paper and tighten screws of the coil.
  • Turn flywheel with your hand and verify there is a gap.
  • Apply small sideways pressure again toward the coil as you turn the flywheel. Again, there must be NO contact.
Once you have success with the above, you may test the output of the coil by placing the removed sparkplug on the plug wire. With the threaded end touching or clipped to the engine metal, whirl the flywheel quickly with the magnet passing the coil. You should see or hear a spark at the thread end of the plug. Easy!

Oct 27, 2016 | Troy-Bilt Garden

1 Answer

How do I test the magneto coil?

There not much you can test. for. It either works or not. Disconnect the kill wire and try starting checking for spark. If spark is present then coil is working a further generating voltage. Check flywheel magnets to see if they good and strong.

Now ignition can fail to operate under compression so a spark gap test set at .166" need to be used. If works at this gap then it should under compression unless the high voltage is broken internally. A resistance test can tell if this is the case. Open circuit reading will most likely be broken wire. Most coil have non-replaceable leads.

Apr 18, 2015 | Husqvarna Garden

1 Answer

What's mag

A mag or magneto is a coil of wire that is "excited" by a permanent magnet thereby inducing a high voltage to fire the spark plug with. Most single cylinder lawnmowers use mag and point systems to fire the plug. Coil is hard mounted and the permanent magnet is part of the flywheel with the points mounted under the flywheel.

A coil is a two coils of wire, one is connected to ground on one end and the other end is connected to either a set of points or an electronic switch, either of which turns on and off the current through that coil. When the coil discharges its electrical potential, its magnetic field collapses, inducing a high voltage in the other coil which is used to fire the spark plug.

Sep 30, 2012 | Generac Rv Generator - 6,500 Watt - 6.5 Kw...

1 Answer

Replaced coil an still no fire out of wire kill wire is not hooked up

My name is Dane and I am going to help you solve your problem. Ok, there aren't many things that can cause you a problem here. First, I have to say to check that spark plug. Make sure it's correctly gapped and not cracked or fouled. Now, check that the flywheel is clean and rustfree. Make sure you have set the coil gap correctly.

To set the gap for the coil, get a regular business card and use it as a feeler gauge. Turn the flywheel so the flywheel magnets are away from the coil. Loosen the bolts to the coil, and pull the coil back, making the gap as large as possible. Rotate the flywheel so the magnets are next to the coil. Slide the business card in between the coil and the flywheel magnets and loosen the coil bolts. If your coil has 2 legs, make sure the business card is under them both. Make sure the coil is even and just snug against the card. Now tighten down your coil bolts and spin the flywheel to remove the business card. Turn the flywheel at least 1 complete turn and make sure it doesn't contact the coil. You're done!!! Put it back together and try it again. It's not unheard of to get a bad new coil. Don't think just because it's new it has to be good.
Well, I think this should get your problem fixed. Thank you! Dane

Dec 22, 2010 | Echo Pb - 413t Backpack Blower

2 Answers

How do you set the gap between the coil and the flywheel, what is the gap on a 4hp snowblower briggs&statton

My name is Dane and I am going to help you solve your problem.
Too set the gap for the coil get a regular buisness card and use it as a feeler gauge. Loosen the bolts to the coil. Rotate the flywheel so the magnets are next to the coil. Slide the buisness card in between the coil and the flywheel magnets and make sure the coil is tight against the card.
Now tighten down your coil bolts and remove the busisness card. Turn the flywheel at least 1 complete turn and make sure it doesn't hit the coil. You're done!!!
Well, I hope I've helped. If you found this information useful, please leave me some THUMBS UP if you think I'm deserving! :-) Thank you! Dane

Dec 05, 2010 | Briggs & Stratton Garden

2 Answers

16'' chain Saw wont fire

Ignition module gap
Place a business or index card between the fly wheel and coil, rotate until the magnetic attraction pulls everything tight together. Tighten the coil screws, rotate the flywheel until the attraction eases and remove the card. Ensure nothing contacts when flywheel is rotated.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Thank You for using FixYa.

May 02, 2010 | Garden

1 Answer

Coil gap

Remove the plug. Place a business or index card between the coil and flywheel. Rotate the flywheel until the magnet holds the coil tightly against the card, tighten all fasteners. Rotate the flywheel until the magnetic attraction eases and remove the card. Rotate the flywheel through a couple of revolutions and ensure nothing drags or contacts the flywheel. HTH

Nov 27, 2009 | Poulan Pro Chain Saw 46cc 20"

1 Answer

What is tolarance between flywheel and pickup coil husq model 40

First, try to move the flywheel end of the crankshaft up and down to check for bearing play. If it seems tight, turn the magnets just under the coil and use a piece of light card stock between the coil and magnets, rock the flywheel slightly, and tighten the coil screws. Rotate the flywheel somewhat to clear the card stock out of the gap. Turn the flywheel one revolution to make sure there is no metal to metal contact. Check for spark.

Sep 13, 2009 | Husqvarna Chain Saw 20" Bar

1 Answer

Chipper won't start

what engine do you have im guessing a briggs & stratton was it running previously or sitting awhile it can be a few things the flywheel key could be sheered or the points are bad or the flywheel & coil are rusted check flywheel & coil to see if rusted if so take coil off mild sand paper like 80 grit i beleave clean both to get the right gap between flywheel & coil turn the flywheel alittle bit so the magnets won't touch coil or if coil still of set flywheel to where it will touch magnets fat peice of sand paper not folded but flat sand paper about .020 gap between magnet & coil if you place sand paper against the flywheel magnet then set coil against sand paper & magnet that should give you 0.020 gap & it should start if not e-mail me i will guide you through everything to get it started

May 11, 2009 | Heavy Machinery

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